The pressure of gas in a cylinder is 70 kilopascals. If the volume of the cylinder is reduced from 8.0 liters to 4.0 liters, what should be the pressure of the gas in the cylinder?

Answer:

Thomson had discovered the first subatomic particle, the electron. Six years later Ernest Rutherford and Frederick Soddy, working at McGill University in Montreal, found that radioactivity occurs when atoms of one type transmute into those of another kind

Explanation:

Final answer:

Using the Combined Gas Law, the pressure of the air in the lungs is calculated to be 1.228 atm when it expands to 215.0 mL at the body temperature of 37.2°C.

Explanation:

The question involves applying the Combined Gas Law to determine the pressure of the air in the lungs of a scuba diver when it expands from the scuba tank conditions to the lungs' conditions. The initial pressure (P1) is 3.50 atm, and the initial volume (V1) is 75.0 mL at an initial temperature (T1) of 5.0°C (278.15 K). The final volume (V2) is 215.0 mL, and the final temperature (T2) is 37.2°C (310.35 K).

To find the final pressure (P2), we can rearrange the Combined Gas Law:

P1 × V1 / T1 = P2 × V2 / T2

Solving for P2:

P2 = (P1 × V1 × T2) / (V2 × T1)

P2 = (3.50 atm × 75.0 mL × 310.35 K) / (215.0 mL × 278.15 K)

P2 = 1.228 atm

The pressure of the air in the lungs, when it expands to 215.0 mL at the body temperature of 37.2°C, is 1.228 atm.

The answer is:

4 moles of [tex]KClO_{3}[/tex] are required to produce 6 moles of  [tex]O_{2}[/tex]

To solve stoichiometric problems, we need to write the balanced equation of the compound that we are working with.

Potassium chlorate decomposition is given by the following equation:

[tex]2KClO_{3}->3KCl+3O_{2}[/tex]

Now, from the equation we know that 3 moles of [tex]O_{2}[/tex] gives 2 moles of [tex]2KClO_{3}[/tex], we can calculate how many moles of the same compound react to produce 6 moles of [tex]O_{2}[/tex] the following equation:

[tex]\frac{No.molKClO_{3}}{6molO_{2}}=\frac{2molKClO_{3}}{3molO_{2}}\\\\No.molKClO_{3}=6molO_{2}*\frac{2molKClO_{3}}{3molO_{2}}\\\\No.molKClO_{3}=4molKClO_{3}[/tex]

Hence, we have that 4 moles of [tex]KClO_{3}[/tex] are required to produce 6 moles of  [tex]O_{2}[/tex]

Have a nice day!

Answer:

0.23

Explanation:

= (mass of salt / mass of water)

= (25.0 g / 105.0 g)

= 0.23

Answer:

D

Explanation:

Answer: option D

Explanation:

Since nonane is a saturated hydrocarbon called an Alkane.

Since it has 9 carbons in its carbon chain hence used Nona as root word

And -ane as suffix since functional group is alkane, single bond.

Hence , Nona+ and= nonane

So D is correct answer

Answer:

509.7583 mL ≅ 509.76 mL.

Explanation:

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

(P₁V₁) = (P₂V₂)

P₁ = 1.2 atm, V₁ = ??? mL.  

P₂= 1.1 atm, V₂ = 556.1 mL.

∴ V₁ = (P₂V₂)/(P₁) = (1.1 atm)(556.1 mL)/(1.2 atm) = 509.7583 mL ≅ 509.76 mL.

Answer:

D. Brecci

The pattern of the rock below resembles the distinct pattern of brecci.

The pattern of conglomerate usually appears to be more round peices in the rock.  The pattern of brecci has a more shard like appearance.

Hope this helps,

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Answer:

The correct answer is option D, that is, breccia.

Explanation:

The clastic sedimentary rocks, which are formed of large angular pieces are termed as breccia. The gaps in between the large angular pieces are occupied with a matrix of smaller constituents and a mineral cement, which holds the rock together. The formation of breccia takes place when the angular and dissociated pieces of minerals or rock debris gather.

Answer:

[tex]\boxed{\text{2.2 g/L}}[/tex]

Explanation:

We can use the Ideal Gas Law to calculate the density of the gas.

   pV = nRT

      n = m/M           Substitute for n

   pV = (m/M)RT     Multiply both sides by M

pVM = mRT            Divide both sides by V

  pM = (m/V) RT

     ρ = m/V             Substitute for m/V

 pM = ρRT              Divide each side by RT

[tex]\rho = \frac{pM }{RT}[/tex]

Data:

p = 1.00 bar

M = 49 g/mol

R = 0.083 14 bar·L·K⁻¹mol⁻¹

T = 0 °C = 273.15 K

Calculation:

ρ = (1.00 × 49)/(0.083 14 × 273.15) = 2.2 g/L

The density of the gas is [tex]\boxed{\text{2.2 g/L}}[/tex].

aFinal answer:

The density of a gas with a molar mass of 49 g/mol at STP is calculated as 2.1875 g/L by dividing the molar mass by the molar volume of a gas at STP which is 22.4 L/mol.

Explanation:

The question asks about the density of a gas with a known molar mass at standard temperature and pressure (STP). At STP, we can utilize the ideal gas behavior which states that one mole of any gas occupies 22.4 liters. To find the density at STP, you use the molar mass of the gas and the volume that one mole occupies.

To calculate the density of the gas, you would use the formula:
Density (d) = Molar mass (M) / Molar volume at STP (V)

Since we know that the molar mass (M) of the gas is 49 g/mol, and the molar volume (V) at STP is 22.4 L/mol, we can plug these into the density equation:
d = M / V = 49 g/mol / 22.4 L/mol

Thus, d = 2.1875 g/L.
Hence, the density of the gas at STP is 2.1875 g/L.

The decomposition of limestone CaCO3 > CaO + CO2

In iron metallurgy with a blast furnace, the non-redox reaction is the decomposition of limestone (calcium carbonate), which forms calcium oxide and releases carbon dioxide.

In the processing of iron in a blast furnace with various stages, most of the reactions are indeed redox ones, where reduction of iron ores happen. However, one of the equations that is not a redox reaction is the thermal decomposition of limestone, an impure form of calcium carbonate (CaCO3). This is done to remove unwanted impurities, forming calcium oxide (CaO) and releasing carbon dioxide (CO2). The equation for this reaction is CaCO3(s) → CaO(s) + CO2(g). Here, there's no transfer of electrons indicating that it's not a redox reaction.

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Answer:

[tex]\boxed{\text{c. Neither a nor b is correct}}[/tex]

Explanation:

A buffer pair consists of either

(a) Oxalic acid and sodium oxalate

[tex]\rm H$_2$C$_2$O$_4$ + Li$_2$C$_2$O$_4$ \longrightarrow \, $2LiHC$_2$O$_4$[/tex]

Oxalic acid is an acid and lithium acid is a base. Together, they will neutralise each other and form the salt LiHC₂O₄.

A solution of LiHC₂O₄ is not a buffer.

The correct buffer pair is H₂C₂O₄ and LiHC₂O₄

(b) Carbonic acid and sodium carbonate

[tex]\rm H$_2$CO$_3$ + Na$_2$CO$_3$ $\longrightarrow \,$ 2NaHCO$_3$[/tex]

The carbonic acid and the sodium carbonate will neutralise each other and form the salt NaHCO₃.

A solution of NaHCO₃ is not a buffer.

The correct buffer pair is H₂CO₃ and NaHCO₃

[tex]\boxed{\textbf{Neither a nor b is correct}}[/tex]

Answer:

A. CCI4

Explanation:

After analyzing the molecular geometry and bond polarities of CCl4, CO2, and SO3, we can conclude that none of these molecules are polar due to the symmetrical arrangement that leads to the cancellation of bond dipoles. The correct answer is D.) None of these.

The question asks to identify which of the listed molecules is polar. To determine if a molecule is polar, we need to assess both the electronegativity differences between bonded atoms and the geometry of the molecule. Molecular polarity arises from an uneven distribution of electron density, leading to a separation of charge.

CCl4 is a molecule with four chlorine atoms symmetrically arranged around a central carbon atom in a tetrahedral structure. The C-Cl bond is polar due to the difference in electronegativity between carbon and chlorine. However, the spatial orientation of the bonds in CCl4 is such that the individual bond polarities cancel out, resulting in a nonpolar molecule.CO2, or carbon dioxide, is a linear molecule with two oxygen atoms bound to a central carbon atom. Although the C=O bond is polar, the linear geometry of CO2 causes the dipoles to cancel each other out, so the molecule itself is nonpolar.SO3, or sulfur trioxide, is a trigonal planar molecule with evenly spaced double bonds between sulfur and oxygen. Like CO2, the individual S=O bonds are polar, but the trigonal planar geometry allows the bond dipoles to cancel, resulting in a nonpolar molecule.Given the symmetrical geometry and cancellation of bond dipoles in CCl4, CO2, and SO3, none of these molecules are polar. Therefore, the correct answer to the question is D.) None of these.

Answer:

On the periodic table, electronegativity generally

1. decreases as you move down a group and

2. increases as you move from left to right across a period.

Therefore, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Electronegativity on the periodic table increases from left to right across a period and decreases from top to bottom within a group, with fluorine being the most electronegative element.

The trend in electronegativity on the periodic table describes how the ability of an atom to attract bonding electrons changes across the table. Generally, electronegativity decreases from top to bottom within a column as a result of increasing atomic size, which makes the nucleus less effective at pulling in bonding electrons. Conversely, electronegativity increases from left to right across a row due to a decrease in atomic size, making the nucleus more effective in attracting bonding electrons. Elements in the halogen group have some of the highest electronegativities because they need only one more valence electron to complete their outer shell, unlike group 1 elements which are more willing to give up their valence electron. Fluorine is the most electronegative element, and cesium is the least electronegative nonradioactive element, excluding the noble gases and hydrogen which have special cases in terms of electronegativity.

For molar mass try to use as many decimal places as possible to be the most accurate. The number of sig figs in your final answer will still be the same as the initial amount of sig figs in the mass given (or whatever value given that has the least amount of sig figs)

Answer:

decimals

Explanation:

Answer:Tationia Rolon

Explanation:

Use this  it might help:

Answer: The average atomic mass of bromine is 79.91 amu.

Explanation:

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

[tex]\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i[/tex]   .....(1)

For isotope 1:

Mass of isotope 1 = 78.92 amu

Percentage abundance of isotope 1 = 50.54 %

Fractional abundance of isotope 1 = 0.5054

For isotope 2:

Mass of isotope 2 = 80.92 amu

Percentage abundance of isotope 2 = 49.46 %

Fractional abundance of isotope 2 = 0.4946

Putting values in equation 1, we get:

[tex]\text{Average atomic mass of Bromine}=[(78.92\times 0.5054)+(80.92\times 0.4946)][/tex]

[tex]\text{Average atomic mass of Bromine}=79.91amu[/tex]

Hence, the average atomic mass of element bromine is 79.91 amu.

Answer:

answer is 2.04*10^4 kPa

Explanation:

Dalton's Law of Partial Pressures.

it is because that when the volume and the temperature of a gaseous mixture are kept constant, the total pressure of the mixture is equal to the sum of the partial pressures of its gaseous components .

Final answer:

Using Dalton's Law of Partial Pressures, the total pressure of a tank containing nitrogen and oxygen gases, given their partial pressures, is calculated as 2.04 × 10⁴ kPa.

Explanation:

The question asks for the total pressure of a tank containing a mixture of nitrogen and oxygen gases, given the partial pressures of both gases. According to Dalton's Law of Partial Pressures, the total pressure of a gas mixture is equal to the sum of the partial pressures of each gas in the mixture. This can be represented by the formula Ptotal = PN2 + PO2, where PN2 is the partial pressure of nitrogen, and PO2 is the partial pressure of oxygen.

In this case, the partial pressure of nitrogen (PN2) is given as 1.61 × 104 kPa, and the partial pressure of oxygen (PO2) is 4.34 × 103 kPa. Therefore, the total pressure (Ptotal) can be calculated as:

Ptotal = 1.61 × 104 kPa + 4.34 × 103 kPa
= 2.04 × 104 kPa

Thus, the total pressure of the tank is 2.04 × 104 kPa.

Answer:

[tex]\boxed{\text{922 mL}}[/tex]

Explanation:

The pressure is constant, so we can use Charles' Law to calculate the volume.

[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]

Data:

V₁ = 693 mL; T₁ =  45 °C

V₂ = ?;           T₂ = 150 °C

Calculations:

(a) Convert temperature to kelvins

T₁ = (  45 + 273.15) = 318.15 K

T₂ = (150 + 273.15) = 423.15 K

(b) Calculate the volume

[tex]\dfrac{ 693}{318.15} = \dfrac{ V_{2}}{423.15}\\\\2.178 = \dfrac{ V_{2}}{423.15}\\\\V_{2} = 2.178 \times 423.15 = \boxed{\textbf{922 mL}}[/tex]

Using Charles's Law, convert the given temperatures to Kelvin, then solve for final volume V2 using the formula V2 = (V1 × T2) / T1. Perform the calculations to determine the volume of gas at 150°C.

To calculate the volume of gas at 150°C when it had a volume of 693 mL at 45°C, we can use Charles's Law which relates volumes and temperatures of an ideal gas, maintaining pressure and the amount of gas constant.

Mathematically, the law is expressed as: V1/T1 = V2/T2. First, we need to convert the temperatures from Celsius to Kelvin by adding 273.15. So, T1 = 45°C + 273.15 = 318.15 K and T2 = 150°C + 273.15 = 423.15 K. We have the initial volume V1 = 693 mL and want to find V2.

Using Charles's Law, we rearrange the formula to solve for V2: V2 = (V1 × T2) / T1. Plugging in the values, we get V2 = (693 mL × 423.15 K) / 318.15 K. Execute the multiplication and division to get the final volume V2.

For Number 2 It Is The Law Of Conversation Of Mass

Number 3 Atoms Of Each Element

Number 7 Oxygen

Number 5 Single Replacement Reaction

I answered a few of them

1.formation of bubbles

2.change in tempeture

3.hydrogen gas

4.NaOH

Answer:

355.5 g.

Explanation:

2Al + 6HCl → 2AlCl₃ + 3H₂,

It is clear that 2.0 moles of Al react with 6.0 mole of HCl to produce 2.0 moles of AlCl₃ and 3.0 mole of H₂.

no. of moles of Al = mass/atomic mass = (87.7 g)/(26.98 g/mol) = 3.251 mol.

Using cross multiplication:

2.0 mol of Al need to react → 6.0 mol of HCl, from stichiometry.

3.251 mol of Al need to react → ??? mol of HCl.

∴ the no. of moles of HCl needed to react with (87.7 g) 3.251 mol of Al = (3.251 mol)(6.0 mol)/(2.0 mol) = 9.752 mol.

mass of HCl = (no. of moles)(molar mass) = (9.752 mol)(36.46 g/mol) = 355.5 g.

Answer:

Explanation:

Volume occupied by Nitrogen gas at STP = number of moles x 22.4dm³/mol

Number of moles = 1.12moles

Volume = 1.12 x 22.4

Volume at STP = 25.1dm³

Answer:

4 th image

Explanation:

water is being boiled n the 4th image indicating that the change between liquids and gasses is water vapor.

Answer:

The soda bottles and the boiling water

Explanation:

just trust

Answer:

= 9,593.1 Joules

Explanation:

Heat absorbed by water is equivalent to heat released by copper.

Heat absorbed is given by;

Q = mcΔT

where m is the mass, c is the specific capacity and ΔT is the change in temperature.

Therefore;

Since dnsity of water is 1 g/mL, and specific heat capacity is 4.18 J/g°C while the change in temperature is (75-24) = 51°C.

Heat absorbed by water = 45 g × 4.18 J/g°C × 51

                                         = 9,593.1 Joules

Therefore, the heat released by copper is 9,593.1 Joules

Answer & Explanation:

Kindly find the attached presentation.

Answer: Start off by figuring out a solid like a ice cube or such then start writing how it changes and what it goes through so say when you apply thermal energy/ heat then it becomes water which is it's liquid state and then continue.

Explanation:

Answer:

3.5 mL/hr.

Explanation:

So, the rate of  the pump in ml per hour will be = (7 mg)/(2 mg/mL)(1 hr) = 3.5 mL/hr.

Final answer:

To provide a patient with 7 mg of medication per hour from a solution of 1000 mg in 500 ml, the flow rate of the pump needs to be set at 3.5 ml per hour.

Explanation:

To calculate the flow rate of the pump in ml per hour for a medication order of 7 mg per hour, when the IV solution provided is 1000 mg in 500 ml, we use the proportion method. This involves setting up a proportion between the strength of the solution and the required dose to find the volume of solution that corresponds to the required dose.

First, we determine how many milligrams are in each milliliter of the solution: 1000 mg in 500 ml means there are 2 mg in each ml (1000 mg / 500 ml = 2 mg/ml). Then, knowing the patient needs 7 mg per hour, to find out how many milliliters that is, we divide the needed dose by the concentration: 7 mg / (2 mg/ml) = 3.5 ml per hour.

This calculation shows that to administer 7 mg of medicine per hour, the flow rate must be set to 3.5 ml per hour.

Answer:

30 electrons

Explanation:

Atoms are made of electrons, protons and neutrons.Protons and neutrons are in the nucleus and electrons are orbiting in energy shells around the nucleus. Atomic number is the number of protons and atomic number is characteristic for the element.

protons are positively charged and electrons are negatively charged. Neutral atoms are when the number of protons and electrons are equal.

Therefore this atoms atomic number is 30 where the number of protons is 30, and in the neutral atom since the number of protons is equal to the number of electrons, the number of electrons is 30

Answer:

1 Polymer

2 Aluminum

3 Hydrocarbons

4 monomers

5 their functional group

6 polyethylene

Explanation:

i took the test

Polymer are the long chains of carbon molecules .

Aluminum among the following is not an organic compound.

Fossil fuels are made from hydrocarbons.

Repeating units in an organic compound are called monomers

The properties of organic compounds determined by their functional group .

Shopping bags and plastic bottles are made up of  polyethylene .

Contain chlorine atom is not a property of alkene.

Polymer-A polymer is a substance or material consisting of very large molecules, called macromolecules .

Aluminum-Aluminum is a chemical element with the symbol Al and atomic number 13.

Hydrocarbons-Theses are the  class of organic chemical compounds composed only of the elements carbon (C) and hydrogen (H).

Monomers-A monomer is a molecule that forms the basic unit for polymers, which are the building blocks of proteins.

Functional group-An atom or group of atoms that replaces hydrogen in an organic compound.

Polyethylene-Polyethylene is a polymer made of repeating ethylene units.

Chlorine atom-Chlorine is a chemical element with the symbol Cl and atomic number 17 .

Learn more about polymer, aluminum , hydrocarbons ,monomers ,functional group, polyethylene ,chlorine atom ,here:

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It is endothermic the cake is taking in heat and baking in order to rise

Answer:

3 meters/second

Explanation:

Speed is roughly defined as distance travelled over a unit of time. So we can calculate the speed of the ball using the formula:

[tex]s=\dfrac{d}{t}[/tex]

where:

s = speed

d = distance

t = time

Given:

d=12 meters

t = 4 seconds

So we plug that in our equation:

[tex]s=\dfrac{d}{t}[/tex]

[tex]s=\dfrac{12meters}{4seconds}[/tex]

[tex]s=3\dfrac{meters}{second}[/tex]

Final answer:

The average speed of the ball is 3 meters per second, calculated by dividing the distance of 12 meters by the time of 4 seconds.

Explanation:

The question asks for the average speed of a ball that rolls 12 meters in 4 seconds. To calculate the average speed, you divide the total distance traveled by the total time taken. In this case, that would be 12 meters divided by 4 seconds, yielding an average speed of 3 meters per second.

The answer is: Charle's Law.

The law that states that the volume and absolute temperature of a fixed quantity of gas (ideal gas) are proportional under constant pressure is the Charle's Law, also known as the law of volumes.

The law describes how a gas kept under constant pressure tends to expand when the temperature increases and it's described by the following equation:

[tex]\frac{V}{T}=k[/tex]

Where,

[tex]V=Volume\\T=Temperature\\k=constant[/tex]

Also, to describe the relationship between two differents volumes at different temperatures, we have:

[tex]\frac{V_{i}}{T_{i}}=\frac{V_{f}}{T_{f}}[/tex]

Where,

[tex]V_{i}=InitialVolume\\T_{i}=InitialTemperature\\V_{f}=FinalVolume\\T_{f}=FinalTemperature[/tex]

Have a nice day!

Answer:

The answer is C.) Charle's law

Explanation:

100% on edge

Answer:

87.894 grams.

Explanation:

So we know that the mass of the carbon is 12g, the Mass of the Hydrogen is  1g and the Mass of the Oxygen is 16g. Given, Chemical Formula of the Sucrose C₁₂H₂₂o₁₁ we can calculate the molar mass by performing the following operation:

Molar Mass = 12 × 12 + 1 × 22 + 16 × 11 = 144 + 22 + 176 = 342 g/mole

So if we need to know the mass in grams of 0.257 mol, then we have to:

342 g/mole * 0.257 mol = 87.894 grams.

The mass in grams is: 87.894 g