Is HSO4 polar or no polar

Answers

Answer 1

Answer:

It is polar

Explanation:

Hydrogensulfate is an oxoanion of sulphur , conjugate base of a sulfuric acid and conjugate acid of a sulfate

Please see the structure of HSO4 in the attached image

Polar molecules have  electronegativity difference between the bonded atoms.

In case of Hydrogensulfate, hydrogen is positive while sulfate is negative ion.

Electronegativity of hydrogen is 2.2 while that of sulfur and oxygen is 2.58 and 3.44 respectively

Thus, it is a polar molecule.

Is HSO4 Polar Or No Polar

Related Questions

The formula CH3CH2CH2CH2CH2CH2 represents an

Answers

Answer:

alkene

Explanation:

Since the end only has CH2 it would be an alkene.

Alkene means their is a double bond present.

Carbon always wants 4 bonds (4-2=2) Therefore this shows us that it is a double bond, known as an alkene.

Also,

alcohol = OH

alkane = single bond

alkene = double bond

alkyne = triple bond

- Hope this helps! Please let me know if you want further explanation.

Final answer:

The chemical formula CH3CH2CH2CH2CH2CH2 represents a type of hydrocarbon known as hexane, a straight-chain alkane with six carbon atoms commonly used as a solvent in labs and a constituent in gasoline.

Explanation:

The formula CH3CH2CH2CH2CH2CH2 represents a hydrocarbon named Hexane. Hexane is a straight-chain alkane with six carbon atoms. The general formula for an alkane is CnH2n+2, which in the case of hexane explains the presence of 14 hydrogen atoms. Hexane is commonly used as a solvent in laboratories and a constituent in gasoline.

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Which isoelectronic series is correctly arranged in order of increasing radius?

A) K+ < Ca2+ < Ar < Cl

B) < Ar < K+ < Ca2+

C) Ca2+ < Ar < K+ < Cl

D) Ca2+ < K+ < Ar < Cl

E) Ca2+ < K+ < Cl- < Ar

Answers

Answer:

D) Ca2+ < K+ < Ar < Cl-

Explanation:

The isoelectronic series is correctly arranged in order of increasing radius is option D. Ca2+ < K+ < Ar < Cl.

Arranging of isoelectronic series:

Since k+, Ca2+, Cl- and Ar represent the same kind of e- (18) due to this the positive charge increased. The size should be decreased due to the net attraction on outer e- increased and a negative charge should increase the size because the electronic repulsion should be increased.

Therefore, the option d is correct.

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If the molar heat of fusion of water is 6.01

kJ

mol

, how much heat energy was required to melt 2 kg of ice?

Answers

Answer : The heat energy required to melt 2 kg of ice was, 667.7 kJ

Explanation :

First we have to calculate the moles of ice.

[tex]\text{Moles of ice}=\frac{\text{Given mass ice}}{\text{Molar mass ice}}=\frac{2kg}{18g/mol}=\frac{2000g}{18g/mol}=111.1mol[/tex]

Now we have to calculate the heat energy.

As, heat energy required to melt 1 mole of ice = 6.01 kJ

So, heat energy required to melt 111.1 mole of ice = 111.1 × 6.01 kJ

                                                                                  = 667.7 kJ

Therefore, the heat energy required to melt 2 kg of ice was, 667.7 kJ

Compare and contrast the causes and effects of ocean-continent

and ocean-ocean convergent plate boundaries.

EXTRA HELP

How are the causes of ocean-continent and ocean-ocean convergent

plate boundaries similar?

How are the causes of ocean-continent and ocean-ocean convergent

plate boundaries different?

How are the effects of ocean-continent and ocean-ocean convergent

plate boundaries similar?

How are the effects of ocean-continent and ocean-ocean convergent

plate boundaries different?

Answers

Answer:seen below

Explanation:

The effects of an ocean-ocean subduction zone are the same as those of an ocean-continent subduction zone in that, the subduction zone where an oceanic plate subducts beneath another oceanic plate are the same as a continent-ocean subduction zone.

They oceanic plate and the continental plate are both convergent zones, but when an oceanic plate converges with a continental plate, the oceanic plate is forced underneath the continental plate this is because oceanic crust is thinner and denser than the continental crust. The difference is that the volcanic arc formed will be a set of islands known as an island arc.

If two plates meet at a convergent plate boundary both are of oceanic crust, the older, denser plate will subduct beneath the less dense plate into a trench, resulting in earthquakes.

Finally, When two continents meet head-on, neither is subducted under, this is because the continental rocks are relatively light and are like two colliding icebergs they resist downward motion. Instead, the crust tends to buckle and be pushed upward or sideways.

The driving forces behind ocean-continent and ocean-ocean convergent plate boundaries are similar, involving the movement of lithospheric plates due to mantle convection, the specific outcomes of these collisions differ based on the types of plates involved.

The causes of ocean-continent and ocean-ocean convergent plate boundaries are similar in that both are driven by the movement of lithospheric plates due to the convection currents in the asthenosphere. The differences in their causes lie in the density and composition of the colliding plates. Ocean-continent convergence occurs when a dense oceanic plate collides with a less dense continental plate, while ocean-ocean convergence involves the collision of two oceanic plates.

The effects of both types of convergent boundaries include the formation of mountains or island arcs, earthquakes, and volcanic activity. However, the specific effects differ due to the nature of the colliding plates. Ocean-continent convergence typically results in the subduction of the oceanic plate under the continental plate, leading to the formation of mountain ranges like the Andes and volcanic activity such as the Cascade Range. In contrast, ocean-ocean convergence leads to the creation of island arcs like the Aleutian Islands and deep ocean trenches such as the Mariana Trench. Additionally, the volcanic activity at ocean-ocean convergent boundaries tends to produce less explosive eruptions compared to the more explosive eruptions that can occur at ocean-continent boundaries.

 Convergent plate boundaries are areas where two or more tectonic plates collide. The movement of these plates is driven by convection currents in the Earth's mantle, specifically the asthenosphere, which is a more ductile layer beneath the lithosphere. These currents cause the overlying lithospheric plates to move, and when this movement is convergent, it leads to collision.

In the case of ocean-continent convergence, the denser oceanic plate is forced beneath the less dense continental plate in a process known as subduction. This subduction can cause melting of the subducting plate, leading to the formation of magma that rises through the continental crust, resulting in volcanic activity. The collision also causes the continental crust to crumple and fold, creating mountain ranges.

Ocean-ocean convergence, on the other hand, involves two oceanic plates. When these plates collide, one plate is typically subducted under the other due to the higher density of the oceanic crust compared to the mantle below. This subduction also leads to volcanic activity, but because the volcanoes form in the ocean, they often create island arcs. The subduction of one oceanic plate beneath another also results in the formation of deep ocean trenches.

The similarities in effects between the two types of convergent boundaries include the creation of topographic highs (mountains or island arcs), seismic activity due to the release of energy as the plates move and collide, and volcanic activity from the melting of the subducting plate.

The differences in effects are primarily due to the different densities and compositions of the colliding plates. Ocean-continent convergence can lead to more dramatic mountain building and more explosive volcanic eruptions because of the interaction between the dense oceanic crust and the less dense continental crust. In contrast, ocean-ocean convergence tends to produce less explosive volcanic eruptions and the creation of island arcs and ocean trenches rather than large mountain ranges on continents.

The lead-containing reactant(s) consumed during recharging of a lead-acid battery is/are ________. The lead-containing reactant(s) consumed during recharging of a lead-acid battery is/are ________. PbSO4 (s) only Pb (s) only PbO2 (s) only both PbO2 (s) and PbSO4 (s) both Pb (s) and PbO2 (s)

Answers

Answer:

PbSO4 (s) only

Explanation:

convert 1.21 kg to grams

Answers

Answer:

1210 grams

Explanation:

Message me for extra info.

snap- parkguy786

Answer:

1210

Explanation:

What are some advantages to use the Hydro kinetic energy? White might be some disadvantages?

Answers

Answer:

Here are some advantages.

Explanation:

Hydropower is fueled by water, so it's a clean fuel source, meaning it won't pollute the air like power plants that burn fossil fuels, such as coal or natural gas.

Hydroelectric power is a domestic source of energy, allowing each state to produce their own energy without being reliant on international fuel sources.

The energy generated through hydropower relies on the water cycle, which is driven by the sun, making it a renewable power source, making it a more reliable and affordable source than fossil fuels that are rapidly being depleted.

Impoundment hydropower creates reservoirs that offer a variety of recreational opportunities, notably fishing, swimming, and boating. Most water power installations are required to provide some public access to the reservoir to allow the public to take advantage of these opportunities.

Some hydropower facilities can quickly go from zero power to maximum output. Because hydropower plants can generate power to the grid immediately, they provide essential back-up power during major electricity outages or disruptions.

In addition to a sustainable fuel source, hydropower efforts produce a number of benefits, such as flood control, irrigation, and water supply.

Some advantages of Hydro kinetic energy is, it can be used to  drive turbines and generate electricity.

What is hydro kinetic energy?

Hydro kinetic energy is the energy derived from the motion of falling water.

The energy (Hydro kinetic energy) can be converted into mechanical energy of turbine which is in turn converted into electrical energy.

Some advantages of Hydro kinetic energyIt is can be used to generate electricityIt is can be used to power some machines like, turbine, etc.Some disadvantage of Hydro kinetic energyIt can lead to loss of water that would have been used for irrigation or other purposes.

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How are transition metals named in metal compounds?

Answers

Answer:

Explanation:em metais alcalinos, acho

Answer:

A roman numeral in parentheses follows the name of the metal.

Explanation:

A 500L tank contains helium gas at 1.50 atm. What is the pressure of the gas in torr

Answers

1140

I hope this help

Ethanol is added to gasoline because the oxygen it contains improves gasoline's burning efficiency. Its combustion reaction is given below. CH3CH2OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g) ∆H = - 1236 kJ a) Is this an exothermic or endothermic reaction? _______________ b) If 15.3 grams of pure ethanol is completely converted to products, calculate how much heat is absorbed or released, in: (1) kJ and in (2) kcal c) If 42.7 g of water vapor is produced, how much heat, in kJ, is absorbed or released?

Answers

Answer:

A) The reaction is exothermic reaction

B) 46 gm CH3CH2OH  = 1236KJ

15.3 gm ch3ch2OH = 1236/46 x 15.3

= 411.10 KJ..........released

therefore  1 KJ = 0.239 K cal

so, 411.10 x 0.239 kcal

= 98.2529 .................. released

c) 54 gm of H2O produced = 1236KJ

so, 42.7 gm H2O produced = 1236/54 x 42.7KJ

= 977.35 KJ released.

Explanation:

Choose the balanced equation for the reaction. Au3+(aq) + Cu+(aq) → Au(s) + Cu2+(aq) Au(s) + Cu2+(aq) → Au3+(aq) + Cu+(aq) Au3+(aq) + 3Cu+(aq) → Au(s) + 3Cu2+(aq) Au(s) + 3Cu2+(aq) → Au3+(aq) + 3Cu+(aq) b Use the standard reduction potentials for the galvanic cell to determine E°.

Answers

Final answer:

The balanced reaction between Au3+(aq) and Cu+(aq) that forms Au(s) and Cu2+(aq) is Au3+(aq) + 3Cu+(aq) → Au(s) + 3Cu2+(aq). To determine the standard cell potential, the standard reduction potentials of the associated half-reactions should be used to evaluate spontaneity.

Explanation:

The question at hand involves galvanic cells and the balancing of redox reactions.

For the balanced equation for the reaction between Au3+(aq) and Cu+(aq), the chemically accurate version is:

Au3+(aq) + 3Cu+(aq) → Au(s) + 3Cu2+(aq)

Standard Reduction Potentials and Galvanic Cell Potential

To determine the standard cell potential (E°), you would reference the standard reduction potentials of the half-reactions:

Oxidation: Cu(s) → Cu2+(aq) +2e−

Reduction: Au3+(aq) + 3e− → Au(s)

By adding the reduction potentials of these half-reactions together, one can ascertain whether the reaction is spontaneous under standard state conditions. Specifically, if the standard cell potential (E°) is positive, the reaction is spontaneous.

HELP MY TEST IS TIMED: A sample of methane gas is 22.8 L at 313 Kelvin and 4.00 atm. What will its pressure be at 341 K and constant volume?

3.7 atm


4.4 atm


2.4 atm


.15 atm

Answers

Answer:

option B.

Explanation:

Given,

Volume,V₁ = 22.8 L

T₁ = 313 K

P₁ = 4 atm

T₂ = 341 K

P₂ = ?

Volume is constant.

Using ideal gas law

[tex]\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

[tex]\dfrac{4}{313}=\dfrac{P_2}{341}[/tex]

[tex]P_2 = \dfrac{4}{313}\times 341[/tex]

[tex]P_ 2 = 4.36\ atm[/tex]

Pressure of the tank is equal to 4.36 atm.

Hence, the correct answer is option B.

1. Calculate the concentration of hydronium ion of both buffer solutions at their starting pHs. Calculate the moles of hydronium ion present in 20.0 mL of each buffer. 2. A change of pH by 1 unit means a change in hydronium ion concentration by a factor of 10. Calculate the number of moles of NaOH that would theoretically be needed to decrease the moles of hydronium you calculated in

Answers

Final answer:

To calculate the concentration of hydronium ion and the moles in a buffer solution, use the formula [H3O+] = 10^(-pH) and Moles = Concentration x Volume.

Explanation:

The concentration of hydronium ion can be calculated using the formula:

[H3O+] = 10^(-pH)

For example, if the starting pH is 4.74, then the concentration of hydronium ion is 10^(-4.74) M

The moles of hydronium ion present in 20.0 mL of the buffer can be calculated using the formula:

Moles = Concentration x Volume

Assuming the concentration of hydronium ion is 10^(-4.74) M, then the moles of hydronium ion in 20.0 mL is (10^(-4.74) M) x (20.0 mL / 1000) L.

Pyridine, C5H5N, is a commonly used reagent in the lab. It is a highly flammable, weakly basic, water-miscible liquid with a distinctive, unpleasant fish-like smell. Suppose now in a buffer solution, the concentration of [C5H5N] is 0.01 M and the concentration of [C5H6N+] (the conjugate acid) is 0.02M. What pH is the buffer? (Given that the Kb for C5H5N is 1.8 x 10−9 )

Answers

Answer:

5.0

Explanation:

We have a buffer system formed by a weak base (C₅H₅N) and its conjugate acid (C₅H₆N⁺). We can calculate the pOH using the Henderson-Hasselbach's equation.

pOH = pKb + log [acid]/[base]

pOH = -log 1.8 × 10⁻⁹ + log 0.02/0.01

pOH = 9.0

Then, we will calculate the pH.

pH + pOH = 14

pH = 14 - pOH = 14 - 9.0 = 5.0

Dr. Terror has developed a new alloy called Ultranomium. He is testing a bar that is 1.25 m1.25 m long and has a mass of 382 g.382 g. Using a carbon‑dioxide infrared laser, he carfully heats the bar from 20.6 ∘C20.6 ∘C to 288 ∘C.288 ∘C. Answer the two questions below, using three significant digits. Part A: If the bar absorbs 89300 J89300 J of energy during the temperature change, what is the specific heat capacity ( cc ) of the Ultranomium?

Answers

Answer:0.8742j/g°C

Explanation: SOLUTION

GIVEN

length of bar=1.25m

mass 382g

temperature= 20°C to 288°C

Q=89300J

Specific Heat Capacity  will be calculated using

Q=mC∆T

where

C = specific heat capacity

Q = heat

m = mass

Δ T = change in temperature

C=Q/ m∆T

=89300/382X(288-20.6)

=0.8742j/g°C

4. If an experimental value for a given observation was 415 nm while the theoretical value

was 435.8 nm, what is the percent error of the observation?

Answers

Answer: % error of observation is 4.77%

Explanation:

Given:

Observation value = 415nm

theoretical value= 435.8nm

Percent error of observation = theoretical value- observation value/ theoretical value x 100 %

= 435.8-415/435.8= 0.04772 x 100 = 4.77%

therefore % error of observation is 4.77%



c. What predictions can you make about ΔH, ΔS, and ΔG for the general reaction A(s) + 2B(g) 3C(g) + D(g) + heat? What conclusions can you make about the spontaneity of the reaction? Explain your reasoning. (4 points)


d. The reaction 2NO2(g) N2(g) + 2O2(g) is spontaneous at all temperatures, yet it hardly happens under normal conditions. How can this be? (2 points)

Answers

ANSWER:

C.

1) Entropy (∆S) is spontaneous

2) Enthalpy (∆H) is not spontaneous

3) Gibbs free energy (∆G) is spontaneous

Therefore the reaction will be spontaneous at high temperature.

D.

Because Nitrogen is favourable to be produced under high temperature, and oxygen under low temperature. Which favours the product side of the equation. But when at a room temperature, which means the temperature is neither low nor high, the product side won't be favoured, and the reaction will not be spontaneous.

EXPLANATION:

C.

1) Entropy is the measure of disorderliness in a system, which increase more in gaseous substances, because the molecules of gases are not stable

Because almost all the reacting substances are in their gaseous state, the entropy of the reaction will be high. Therefore entropy will be positive, which makes the entropy of the system spontaneous.

2) Enthalpy is the measure of heat change in the system. Since their is an intake of heat in the system, therefore the reaction is endothermic and ∆H will be positive. Enthalpy of a system can only be spontaneous in an Exothermic reaction, where ∆H is negative. Therefore Enthalpy is not spontaneous.

3) Gibbs free energy is equal to the change in enthalpy minus the product of temperature and change in entropy. Since entropy and enthalpy are positive, the Gibbs free energy will be negative, which shows that the reaction can be spontaneous if some conditions are met. ∆G will be spontaneous because it is negative.

Therefore in summary, the reaction will favour the product side more, if the temperature of the system is increased, which will make the reaction to become more spontaneous.

D.

2NO2(g) --> N2(g) + 2O2(g)

This reaction is not spontaneous under atmospheric pressure and room temperature (normal conditions) because, Nitrogen can only be produced very fast at a high temperature, while oxygen production is preferable in a low temperature. For the reaction to favour the product side, the temperature should be increased or decreased. Because an increase or a decrease in the temperature will favour either nitrogen or oxygen, which are the product side of equation. This means that the reaction should not be spontaneous if you wish to achieve an equal proportion of the products.

What is the enthalpy change during the process in which 100.0 g of water at 50.0 °C is cooled to ice at –30.0 °C?

(Use the specific heats and enthalpies for phase changes)

Answers

Answer:

 60.1 kJ

Explanation:

Enthalpy change ΔH = m x Δt x cρ

Given that:

100 grams water = 5.56 moles water

The enthalpy change needed to raise 100 g water from 50°C to 0°C is calculated as :

ΔH = 100g x ( 0-50) x 4.18J/gC = -2.09 X 10⁴ Joules

The Freezing water  

ΔH = ΔH fusion * mol

ΔH fus for water is = 6.01 kJ/mol

ΔH = 6.01 kJ/mol × 5.56 moles = -33.4 kJ  (since heat is released when water freezes)

Finally, The enthalpy Change during the process pf changing the  ice from  0°C to -30.0°C  is:

ΔH = m x Δt x cp

= 0.100 kg × (-30 -0)°C  × 2.00 × 10³ J/kgC

= - 6 × 10³ J

Total heat lost = -2.09  × 10⁴ J + (-33.4 × 10³ J) + (-6  × 10^3J)

= - 6.01  × 10⁴ J

=  60.1 kJ

Final answer:

The enthalpy change during the process in which 100.0 g of water at 50.0 °C is cooled to ice at -30.0 °C is -60.570 kJ, involving three energy changes: cooling water from 50°C to 0°C, transition from water to ice, and cooling from 0°C to -30°C.

Explanation:

The calculation of the enthalpy change in converting 100.0 g water at 50.0 °C to ice at -30.0 °C involves calculating energy changes at different stages: cooling water from 50°C to 0°C, changing water at 0°C to ice at 0°C (enthalpy of fusion), and cooling ice from 0°C to -30°C. Below is step be step calculation.

Cooling of water: Using the formula Q = m * C * ΔT (where Q is energy, m is mass, C is specific heat, and ΔT is temperature change), we calculate: Q1 = 100.0 g * 4.18 J/(g*K) * -50.0 K = -20900 J. Water to ice: Enthalpy of fusion for water is 334 J/g, so Q2 = 100.0 g * -334 J/g = -33400 J. Cooling of ice: The specific heat of ice is 2.09 J/(g*K), Q3 = 100.0 g * 2.09 J/(g*K) * -30.0 K = -6270 J.

The total enthalpy change is therefore Q total = Q1 + Q2 + Q3 = -20900 J - 33400 J - 6270 J = -60570 J, or -60.570 kJ.

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Give the formula for the alkyne containing 40 hydrogens

Answers

Answer:

Molecular formula is C21H40

Explanation:

Use the formula CnH2n-2

That is the alkyne formula

The formula for the alkyne containing 40 hydrogens is C21H40. This is further explained below.

What is Molecular formula?

Generally, Molecular formula is simply defined as a chemical formula that shows how many atoms of each element there are in each molecule of a material.

In conclusion, Using the alkyne formula which is C_nH2n-2.

We have C21H40 as the alkyne containing 40 hydrogens.

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Draw the products of the acid-base reaction between stearic acid and OH-

Answers

Answer:

Products are stearate anion and water.

Explanation:

Stearic acid is a 18-carbon chain molecule containing -COOH group. IUPAC name of stearic acid is octadecanoic acid.

Molecular formula of stearic acid is [tex]C_{17}H_{35}CO_{2}H[/tex].

When [tex]OH^{-}[/tex] is added into stearic acid, [tex]OH^{-}[/tex] removes a proton ([tex]H^{+}[/tex]) from acidic -COOH group and forms stearate anion and water as products.

The balanced acid-base reaction is given as:

                  [tex]C_{17}H_{35}CO_{2}H+OH^{-}\rightleftharpoons C_{17}H_{35}CO_{2}^{-}+H_{2}O[/tex]

Structure of products are given below.

a sample of oxygen occupies 75 L at 1 atm. If the volume double what is the new pressure of oxygen in atm

Answers

Answer:

[tex]P_2=\frac{1}{2} \text{ atm}[/tex]

Explanation:

Considering ideal gas situation and initial condition as 1 and final condition as 2 all  other conditions being constant we get

[tex]P_1V_1=P_2V_2[/tex]

Here P1 = 1 atm , V1= 75L, also, V2=2V1 = 2×75 L =150 L

using above equation we have

[tex]1\times75=150\times P_2\\P_2=\frac{75}{150} = \frac{1}{2} \text{ atm}[/tex]

Consider the reaction below.
21- (aq) + Cl2(g)—>2014(aq) +12(aq)
Which half reaction correctly describes the reduction that is taking place?
© C12(g) +2 ->2014 (aq)
C12(g) +-->2014 (aq)
21+ (aq) — > 2(aq) + 2e7
21+ (aq) —
> 12(aq) + e

Answers

Answer:

Refer to pic above

Explanation:

Cl's oxidation state reduces from 0 in Cl2 to - 1 in Cl-.

For the given reaction the reduction reaction is Cl[tex]_2[/tex] + 2e⁻→ 2Cl⁻. Therefore, the correct option is option C.

What are oxidation and reduction?

Any chemical process in which a participating chemical species' oxidation number changes is known as an oxidation-reduction reaction, often known as a redox reaction. The phrase refers to a broad range of processes. Many oxidation-reduction processes are as frequent and well-known as fire, metal corrosion and disintegration, fruit browning, respiration, and photosynthesis—basic life processes.

These three processes have two things in common: (1) they are coupled, meaning that every oxidation reaction results in a subsequent reduction; and (2) they involve a typical net chemical change, meaning that an atom or electron moves through one unit of matter to the other. For the given reaction the reduction reaction is Cl[tex]_2[/tex] + 2e⁻→ 2Cl⁻

Therefore, the correct option is option C.

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Which disease is most likely to cause each effect?

Destruction of red blood cells:

Shaking hands or feet:

Streaks of pus in the throat area:

Inability of the immune system to fight off pathogens:

Answers

Answers:

Though no result is wholesome without further tests and observed symptoms, these diseases could be causative for the following symptoms:

Explanation:

Destruction of red blood cells:  AnaemiaShaking hands or feet:  Parkinson's disease, Sclerosis, Peripheral neuropathyStreaks of pus in the throat area:  Glandular fever, tonsillitisInability of the immune system to fight off pathogens: HIV?AIDS, Leukemia.

why earth not flat and why we live in this country not yours

Answers

Answer:

Earth is not flat because the spheroidical shape provides a more effective shape in terms of exposed surface area for absorbing and radiating radiation, and also for a relatively more uniform gravity pull on different points on its surface which might not be so for a flat surface.

You live in your country, not mine because you have evolved over time to be more adapted to living in your own kind of envoirment. Members of a certain species (like you and me as humans) have been spread to maximize the survivability of their species compared to if they were clustered to a particular place.

A biochemist carefully measures the molarity of glycerol in of photobacterium cell growth medium to be . Unfortunately, a careless graduate student forgets to cover the container of growth medium and a substantial amount of the solvent evaporates. The volume of the cell growth medium falls to . Calculate the new molarity of glycerol in the photobacterium cell growth medium. Round each of your answers to significant digits.

Answers

Note:

The Complete Question

A biochemist carefully measures the molarity of glycerol in 913 mL of photobacterium cell growth medium to be 81.3 μM. Unfortunately, a careless graduate student forgets to cover the container of growth medium and a substantial amount of the solvent evaporates. The volume of the cell growth medium falls to 11.1 mL. Calculate the new molarity of glycerol in the photobacterium cell growth medium. Round each of your answers to 3 significant digits.

Answer:

669 μM

Solution:

[Find the attachment]

please help which one is it

Answers

Answer:

d:more dense and falls

Explanation:

warm air Rises around cold air bc of its lower density. and when you have a lower density fluid or sum the lower density fluid rises and the higher density falls

Answer:

Explanation:

I have the same question

Question 51 pts A breathalyzer is a device used to estimate the blood alcohol content of a suspected drunk driver by measuring the amount of alcohol in one's breath. The fuel cell breathalyzer employs the reaction below: CH3CH2OH(g)+O2(g)→HC2H3O2(g)+H2O(g) When a suspected drunk driver blows his or her breath through the fuel-cell breathalyzer, the device measures the current produced by the reaction and calculates the percent alcohol in the breath. How many moles of electrons are transferred per mole of ethanol, CH3CH2OH, in the reaction?

Answers

Answer:

Four moles of electrons

Explanation:

The reactions in a breathalyzer are redox reactions. Fuel cell breathalyzers consists of fuel cells with platinum electrodes. The current produced depends on the amount of alcohol in the breath. Detection of alcohol involves the oxidation of ethanol to ethanoic acid. The two half cells set in the process are;

Anode;

C2H5OH(aq) + 4OH^-(aq) ----------> CH3COOOH(aq) + 3H2O(l) + 4e

Cathode;

O2(g) + 2H2O(l) +4e--------> 4OH^-(aq)

Hence four electrons are transferred in the process.

Are the following statements true or false? (a) Formal charges represent an actual separation of charges. true false (b) ΔH o rxn can be estimated from the bond enthalpies of reactants and products. true false (c) All second-period elements obey the octet rule in their compounds. true false (d) The resonance structures of a molecule can be separated from one another in the laboratory. true false

Answers

Answer:

Explanation:

A) Formal charges represent an actual separation of charges.(FALSE)

(B) ΔHo rxn can be estimated from the bond enthalpies of reactants and products.(TRUE)

C)All second-period elements obey the octet rule in their compounds(FALSE).

(D)The resonance structures of a molecule can be separated from one another in the laboratory.(FALSE)

Bond enthalpy which is also reffered to as bond energy is the amount of energy that is required to break one mole of a bond.

taking the single bond between Oxygen and Hydrogen into considerationthe bond energy between their single bond is 463 kJ/mol.

formal charge is used for the comparison of the number of electrons present around an atom in a particular molecule with the number of electrons present around a neutral

Final answer:

Formal charges do not represent actual charge separation, ΔH°rxn can be estimated using bond enthalpies, not all second-period elements obey the octet rule, and resonance structures cannot be physically separated.

Explanation:

Addressing the truthfulness of the given statements:

Formal charges represent an actual separation of charges is false. Formal charges are a way of computing the charge distribution within a Lewis structure and do not represent an actual charge separation.ΔH°rxn can be estimated from the bond enthalpies of reactants and products is true. This is a common method for estimating the change in enthalpy for a reaction.All second-period elements obey the octet rule in their compounds is false. While many do, there are exceptions, such as boron, which can have incomplete octets.The resonance structures of a molecule can be separated from one another in the laboratory is false. Resonance structures are theoretical concepts that represent different ways of drawing the same molecule and cannot be separated.

Antifreeze is used in car engines. It is produced by a local manufacturer, but they’ve run out of an ingredient: ethane (C2H6). As a junior scientist, you know you can produce ethane by reacting sulfuric acid with diethyl zinc gas. The local manufacturer will pay $1.25 per gram of ethane you produce. If you have 45.00 mL of 8.00 M H2SO4 and 30.00 mL of Zn(CH3CH2)2, what is the maximum amount of money you can make?

Answers

Answer:

Maximum amount of money = $21.95

Explanation:

Required reaction:

H2SO4 + Zn(CH3CH2)2 -------------> 2 C2H6 + ZnSO4

No.of moles of H2SO4= (45 x 10-3 L) x (8 M) = 0.360 mol

No.of moles of Zn(CH3CH2)2 = (30 x 1.205) / (123.50 g/mol) = 0.2927 mol

Here H2SO4 is in excess amount and Zn(CH3CH2)2is the limiting reagent.

Hence, Maximum no.of moles of ethane that can be produced = 2 * 0.2927 mol = 0.484 mol

Hence, Mass of ethane that can be produced = 0.484 mol x 30 g/mol = 17.56 g

Therefore,Maximum amount of money that you can make :

Maximum amount of money = (17.56 g) x ($1.25 /g)

Maximum amount of money = $21.95

On a hot summer day in Florida, Sarah was having a picnic with her family. She took a glass, which had been sitting in the Sun, and filled it with ice cubes from a cooler. Then she added cold lemonade from a thermos jug. Which of the following describes one direction in which heat will flow?
A.From the ice cube to the glass.
B. From the lemonade to the glass.
C. From the lemonade to the ice cube.
D. From the ice cube to the lemonade.

Answers

I think the answer is b

The objects will exchange thermal energy, until thermal equilibrium is reached. This means until their temperatures are equal. Here the direction in which heat will flow is from the lemonade to the glass. The correct option is B.

What is heat flow?

The transfer of heat energy from an object or substance to another because of the difference in the temperature between them is defined as the heat flow. The flow of heat occurs from an object of higher temperature to an object of lower temperature.

The heat flows from hot objects to cold objects by several processes such as radiation, conduction and convection. However evaporation allows an object to lose the heat even if the surrounding medium in which it is immersed is hotter than the object itself.

Here lemonade has higher temperature than the glass. So heat flows from lemonade to the glass.

Thus the correct option is B.

To know more about heat flow, visit;

https://brainly.com/question/16951586

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