Answer:
The equilibrium constant for the reaction comes out to be 7.145
Explanation:
Given concentration of all the species at equilibrium are shown below
[tex]\left [ SO_{2} \right ] = 0.42 \textrm{ M}, \left [ O_{2} \right ] = 0.21 \textrm{ M}, \left [ SO_{3} \right ] = 0.072 \textrm{ M}[/tex] \\
Given reaction is shown below
[tex]2\textrm{SO}_{3}\left ( g \right )\rightleftharpoons 2\textrm{SO}_{2}\left ( g \right )+\textrm{O}_{2}\left ( g \right )[/tex]
[tex]K_{eq} = \displaystyle \frac{\left [ SO_{2} \right ]^{2}\times \left [ O_{2} \right ]}{\left [ SO_{3} \right ]^{2}} \\K_{eq} = \displaystyle \frac{\left ( 0.42 \right )^{2}\times 0.21}{\left ( 0.072 \right )^{2}} \\K_{eq} = 7.145[/tex]
[tex]K_{eq}[/tex] for the reaction is 7.145
The equilibrium constant (Keq) for the reaction 2SO3(g) -> 2SO2(g) + O2(g) is calculated using the equilibrium concentrations of the reactants and products and the formula Keq = ([SO2]^2 * [O2]) / ([SO3]^2), yielding an approximate value of 7.15.
The student is asking how to calculate the equilibrium constant (Keq), also referred to as the equilibrium constant Kc, for the reverse reaction 2SO3(g) -> 2SO2(g) + O2(g) given the equilibrium concentrations of the reactants and products. To calculate Keq, we use the following equilibrium expression:
Keq = ([SO2]^2 * [O2]) / ([SO3]^2)
Substituting the equilibrium concentrations into the expression gives:
Keq = (0.422 * 0.21) / (0.0722)
Keq = (0.1764 * 0.21) / (0.005184)
Keq = 0.037044 / 0.005184
Keq = 7.146 (rounded to three significant figures)
Therefore, the value of the equilibrium constant (Keq) for the reaction 2SO3(g) -> 2SO2(g) + O2(g) is approximately 7.15.
The pressure on 40ml of a gas is increased from 760mm to 800mm.find the new volumes at the same temperature.
The new volume is 38 ml.
Explanation:
At NTP,
P1 = 760 mm,
P2 = 800 mm,
V1 = 40 ml
Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely.
By applying Boyle's law,
P1 V 1 = P2 V2
where P1, P2 represents the pressure of a gas,
V1, V2 represents the volume of a gas.
P1 V 1 = P2 V2
760×40 = 800×V 2
V 2 = (760×40) / 800
V2 = 38 mL.
The new volume of the gas at the increased pressure, while maintaining the same temperature, is 38 ml.
The correct formula to use in this situation is Boyle's Law, which states that for a given mass of gas at constant temperature, the pressure of the gas is inversely proportional to its volume. Mathematically, this can be expressed as:
[tex]\[ P_1V_1 = P_2V_2 \][/tex]
where [tex]\( P_1 \)[/tex] and [tex]\( V_1 \)[/tex] are the initial pressure and volume, and [tex]\( P_2 \)[/tex] and [tex]\( V_2 \)[/tex] are the final pressure and volume.
Given:
- Initial pressure, [tex]\( P_1 = 760 \)[/tex] mm Hg
- Final pressure, [tex]\( P_2 = 800 \)[/tex] mm Hg
- Initial volume, [tex]\( V_1 = 40 \)[/tex] ml
We want to find the final volume [tex]\( V_2 \)[/tex].
Using Boyle's Law:
[tex]\[ P_1V_1 = P_2V_2 \][/tex]
[tex]\[ 760 \times 40 = 800 \times V_2 \][/tex]
[tex]\[ V_2 = \frac{760 \times 40}{800} \][/tex]
[tex]\[ V_2 = \frac{30400}{800} \][/tex]
[tex]\[ V_2 = 38 \text{ ml} \][/tex]
Quiz
1. When a gas is heated,
A all of the absorbed energy is converted to kinetic energy
O
B
none of the energy is converted to kinetic energy
Csome of the absorbed energy is converted to potential energy and
some is converted to kinetic energy
D all of the absorbed energy is converted to potential energy
The correct option is C. Some of the absorbed energy is converted to potential energy and some is converted to kinetic energy
Explanation:
When a gas is heated, some of the molecules absorb enough energy to convert it into kinetic energy, which makes the molecules to move faster, collide with each other and also collide with the walls of the container.But some of the molecule do not get required energy to convert it into kinetic energy, whereas it is converted into potential energy, energy possessed by a molecule due to its position.Thus by considering this above explanation it is clear that Option C can be consider as the opt answer
What’s the molar mass of Rb3n
Answer:
147.473 g/mol
Explanation:
Determine from the balanced chemical reaction if
the derived mole ratio is correct or incorrect.
4Zn + 10HNO3 + 4Zn(NO3)2 + N20 + 5H20
Help me please
Answer:
The equation is balanced
Explanation:
Before a equation can be said to be balanced the number of mole at the reaction side must be equal to number mole at the product side
Let's start with Zn at the reactant side 4 moles of Zn reacts and 4 moles of Zn was obtained from the product side which makes it balanced
Let's take HNO3
For H,10 moles react and 10 moles was obtained in the product side
For N,10 moles react and 8 moles was obtained initially and 2 moles was obtained as well which makes it 10 moles and it makes it balanced
For O,30 moles react and after calculating the total amount of O at the product side it was observed to be 30 which indicates that the equation is balanced...
The equation is absolutely well balanced
A sample of iron with a mass of 50.0 grams absorbs 2500 J of thermal energy. How much would the temperature of this sample change as a result of absorbing this amount of heat?
Temperature change would be 112.6° C.
Explanation:
We can find the amount or heat absorbed or emitted during any reaction by finding the product of their mass, specific heat, and change in temperature of the metal.
Mass of the iron, m = 50.0 g
Amount of heat absorbed, q = 2500 J
Change in temperature, ΔT = ?
Specific heat of Iron, C = 0.444 J/g °C
[tex]\boldsymbol{q}=\boldsymbol{m} \times \boldsymbol{C} \times \boldsymbol{\Delta} \mathbf{T}[/tex]
Plugin the values and rearrange the equation to get the change in temperature as,
[tex]\Delta \mathbf{T}=\frac{\mathbf{q}}{c \times m}[/tex]
[tex]\Delta \mathrm{T}=\frac{2500 \mathrm{J}}{0.444 \frac{J}{\mathrm{g}^{\circ} \mathrm{C}} \times 50 \mathrm{g}}=112.6^{\circ} \mathrm{C}[/tex]
The temperature of the iron sample would change by approximately [tex]\( 111.11 \, ^\circ \text{C} \)[/tex] as a result of absorbing 2500 J of thermal energy.
To determine the change in temperature of the iron sample, we need to use the specific heat capacity formula [tex]\[ q = m \cdot c \cdot \Delta T \][/tex]
where:
[tex]- \( q \)[/tex] is the amount of heat absorbed or released (in joules),
[tex]- \( m \)[/tex] is the mass of the substance (in grams),
[tex]- \( c \)[/tex] is the specific heat capacity of the substance (in joules per gram per degree Celsius),
[tex]- \( \Delta T \)[/tex] is the change in temperature (in degrees Celsius).
For iron, the specific heat capacity [tex]\( c \)[/tex] is approximately [tex]\( 0.450 \, \text{J/g}^\circ \text{C} \)[/tex].
Given:
[tex]- \( q = 2500 \, \text{J} \), - \( m = 50.0 \, \text{g} \), - \( c = 0.450 \, \text{J/g}^\circ \text{C} \).[/tex]
We can rearrange the formula to solve for [tex]\( \Delta T \)[/tex]:
[tex]\[ \Delta T = \frac{q}{m \cdot c} \][/tex]
Now, plug in the values:
[tex]\[ \Delta T = \frac{2500 \, \text{J}}{50.0 \, \text{g} \cdot 0.450 \, \text{J/g}^\circ \text{C}} \] \[ \Delta T = \frac{2500}{50.0 \times 0.450} \] \[ \Delta T = \frac{2500}{22.5} \] \[ \Delta T \approx 111.11 \, ^\circ \text{C} \][/tex]
The answer is: [tex]111.11 \, ^\circ \text{C}[/tex].
2 of 5
If an atom loses and electron what type of ion does it form?
Answer
cation
Explanation:
If an atom losses electrons it forms a positively charged ion called the cation.
cation has more protons than electrons, thereby giving it a net positive charge.
To form a cation one or more electrons must be lost, typically pulled away by atoms with a stronger affinity for them.
The number of electrons lost, and so the charge of the ion, is indicated after the chemical symbol, e.g. zinc (Zn) loses two electrons to become Zn2+.
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When liquid lemonade is placed in a freezer, its temperature slowly drops. Its molecules move less and less until they can only vibrate in a rigid structure.
Which of the following is another way to describe this process?
A.
Heat is removed from the lemonade, causing it to become a solid.
B.
Heat is added to the lemonade, causing it to become a solid.
C.
Heat is added to the lemonade, causing it to become a gas.
D.
Heat is removed from the lemonade, causing it to remain a liquid.
Answer:
(A) Removed and solid
Explanation:
ANSWER ASAP AND I WILL GIVE BRAINLYEST!!!!
Answer:
20m
Explanation:
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5.0 mL of ethanol has a mass of 3.9g and 5.0 mL of benzene has a mass of 44g what is the density of each liquid which is denser
The density of ethanol is 0.78 g/mL and the density of benzene is 8.8 g/mL. Benzene is denser than ethanol.
Explanation:The density of a substance is calculated by dividing its mass by its volume. To find the density of ethanol, divide its mass (3.9g) by its volume (5.0 mL). The density of ethanol is therefore 0.78 g/mL. To find the density of benzene, divide its mass (44g) by its volume (5.0 mL). The density of benzene is 8.8 g/mL. Since the density of benzene is higher than the density of ethanol, benzene is denser than ethanol.
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The density of ethanol is 0.78 g/mL and the density of benzene is 8.8 g/mL. Benzene is denser than ethanol.
To find the density of each liquid, the formula for density will be used:
[tex]\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \][/tex]
Given:
Ethanol:
Volume [tex](\(V\))[/tex] = 5.0 mL
Mass [tex](\(m\))[/tex] = 3.9 g
Benzene:
Volume [tex](\(V\))[/tex] = 5.0 mL
Mass [tex](\(m\))[/tex] = 44 g
Density of Ethanol:
[tex]\[ \text{Density of Ethanol} = \frac{3.9 \, \text{g}}{5.0 \, \text{mL}} \][/tex]
[tex]\[ \text{Density of Ethanol} = 0.78 \, \text{g/mL} \][/tex]
Density of Benzene:
[tex]\[ \text{Density of Benzene} = \frac{44 \, \text{g}}{5.0 \, \text{mL}} \][/tex]
[tex]\[ \text{Density of Benzene} = 8.8 \, \text{g/mL} \][/tex]
What mass of water should be added to 22.0 g of KCl to make a 5.50 % by mass solution?
The mass of water that should be added to 22.0 g of KCl to make a 5.50% by mass solution is 488.9 g.
Explanation:Mass of Water to be Added:To calculate the mass of water to be added, we can use the concept of mass percent. The mass percent is the mass of the solute divided by the mass of the solution, multiplied by 100%. We can set up the following equation:
Mass of KCl / (Mass of KCl + Mass of Water) = 5.50%
Let's solve for the mass of water:
Mass of Water = Mass of KCl / (0.055 - 1)
Mass of Water = 22.0 g / 0.045
Mass of Water = 488.9 g
Therefore,
488.9 g of water
should be added to 22.0 g of KCl to make a 5.50% by mass solution.
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are magnesium and calcium more reactive with oxygen in the air than aluminum?
Magnesium and calcium are more reactive with oxygen in the air than aluminum.
Explanation:Magnesium and calcium are more reactive with oxygen in the air than aluminum.
Magnesium reacts with oxygen to form magnesium oxide (MgO), while calcium reacts with oxygen to form calcium oxide (CaO). Aluminum also reacts with oxygen, but it forms a thin layer of aluminum oxide (Al2O3) on its surface, which acts as a protective barrier to further reaction. This layer prevents aluminum from reacting as readily with oxygen compared to magnesium and calcium. Therefore, magnesium and calcium are more reactive with oxygen in the air than aluminum.
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Identify the missing coefficient in the balanced equation and classify the type of reaction.
Cl2O3 + H20- HCIO3
Final answer:
The missing coefficient in the reaction Cl2O3 + H2O → HCIO3 is 2 in front of HCIO3, resulting in a balanced equation Cl2O3 + H2O → 2 HCIO3, which is a combination reaction.
Explanation:
The missing coefficient in the chemical equation Cl2O3 + H2O → HCIO3 should balance the number of atoms of each element on both sides of the equation. In this case, to balance chlorine and oxygen atoms, we should place a coefficient of 2 in front of HCIO3, resulting in Cl2O3 + H2O → 2 HCIO3. This is an example of a combination reaction, where two or more substances combine to form a single product. Below are several examples of different reaction types for context:
a. Combustion reaction: C6H5CH3 + 9O2 → 7CO2 + 4H2Ob. Decomposition reaction: 2NaHCO3 → Na2CO3 + H2O + CO2c. Synthesis reaction: C + 2H2 → CH4
The temperature of a sample of gas in steel container at 30.3 Atm is
increased from -100.0 °C to 150 °C. What is the final pressure inside the
Given
Gas Law
Work
P1 =
1 P2 =
T1 =
Formula
Answer:
74.09 atm
Explanation:
Using the gas laws ( Charles and Boyle's law). We have the formula ,
P1/T1 = P2/T2
Where P1 = 30.3atm
T1 = -100 degree Celsius
to kelvin = -100+ 273 = 173K
T2 = 150 degree Celsius
To Kelvin = 150 = 150+273 = 423K
Imputing values
P1/T1 = P2/T2
30.3/173 = P2/ 423
Cross multiply
173×P2 = 30.3 ×423
173P2 = 12816.9
Divide both sides by 173
P2 = 12816.9/173
P2 = 74.09 atm
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Answer:
P2=74.086atm
Explanation:
Using the formula p1/t1=P2/t2
P1=30.3atm
P2=?
T1=-100°c to Kelvin=273-100=173k
T2=150°c to Kelvin=273+150=423k
30.3\173=x/423
Cross multiply
173x=423×30.3
173x=12816.9
Divide both sides by 173
X=74.086atm
What’s the formula for Lithium acetate
The chemical formula for lithium acetate is [tex]LiC_2H_3O_2[/tex]. It consists of one lithium ion [tex](Li^+)[/tex] and one acetate ion [tex](C_2H_3O_2^-)[/tex].
Lithium acetate is composed of lithium ions [tex](Li^+)[/tex] and acetate ions [tex](C_2H_3O_2^-)[/tex].
The formula indicates that for each lithium ion, there is one acetate ion. In chemical formulas, the subscripts indicate the number of atoms of each element present in the compound.
In this case, "Li" represents lithium, "C" represents carbon, "H" represents hydrogen, and "O" represents oxygen.
So, the formula [tex]LiC_2H_3O_2[/tex] indicates that there is one lithium atom, two carbon atoms, three hydrogen atoms, and two oxygen atoms in lithium acetate.
Organic Chemistry
Which example is not an organic compound?
com oil
methane
protein
aluminum
Answer:
aluminum
Explanation:
i took the test
How many grams are in 1.25 moles of Potassium hydroxide, KOH?
1 point
Answer:
There are 70 grams of KOH
Explanation:
First, we calculate the weight of 1 mol of KOH:
Weight 1 mol KOH: Weight K + Weight 0 + Weight H= 39g+ 1g+ 16g= 56 g/mol
1 mol-------56 g KOH
1,25 mol----x= (1,25 molx56 g KOH)/1 mol= 70 g KOH
A balloon is filled with 12 L of air at a pressure of 2 atm. What is the volume of the balloon if the pressure is changed to 3 atm?
Answer:
8L
Explanation:
Using Boyle's law which states that the volume of a given mass of gas is inversely proportional to the pressure, provided temperature remains constant
P1V1= P2V2
P1 = 2atm, V1 = 12L ,
P2 = 3atm , V2 =
12 × 2 = V2 × 3
Divide both sides by 3
V2 = 24 ÷ 3
V2 = 8L
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A gas at STP occupies 22.4 L if the temperature is changed to 260 K and the pressures changed it to 0.50 ATM what will the new volume be
Answer:
The new volume will be 42, 7 L.
Explanation:
We use the gas formula, which results from the combination of the Boyle, Charles and Gay-Lussac laws. According to which at a constant mass, temperature, pressure and volume vary, keeping constant PV / T. The conditions STP are: 1 atm of pressure and 273 K of temperature.
P1xV1/T1 =P2xV2/T2
1 atmx 22,4 L/273K = 0,5atmx V2/260K
V2=((1 atmx 22,4 L/273K )x 260K)/0,5 atm= 42, 67L
Describe the fate of the edges of two converging crustal plates. One plate is dense
oceanic crust and the other is less-dense continental crust.
its the oceam which is blue in color so
Enter a chemical equation for Ca(OH ) 2 (aq) Ca(OH)2(aq) showing how it is an acid or a base according to the Arrhenius definition. Consider that strong acids and bases dissociate completely.
According to the Arrhenius definition, Ca(OH)₂ is a Arrhenius base.
What is Arrhenius theory?According to the Arrhenius theory, acids are those substance which gives H⁺ ion in the aqueous solution and bases are those substances which gives OH⁻ ion in the aqueous solution.
Chemical equation for the dissociation of Calcium hydroxide is:
Ca(OH)₂ → Ca²⁺ + 2OH⁻
From the above equation it is clear that Ca(OH)₂ is an Arrhenius base as it gives hydroxide ion.
Hence, Ca(OH)₂ is a Arrhenius base.
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Calcium hydroxide, Ca(OH)₂, is a base according to the Arrhenius definition, as it produces hydroxide ions (OH-) when it dissolves in water. The equation representing this is Ca(OH)₂ (aq) → Ca²⁺ (aq) + 2OH- (aq). It is considered a strong base because it dissociates completely in water.
Explanation:According to the Arrhenius definition, a base is a substance that releases hydroxyl ions (OH-) when it is dissolved in water. Calcium hydroxide, Ca(OH)₂, is considered to be a base because it dissociates in water to form calcium ions (Ca²⁺) and hydroxide ions (OH-). The chemical equation representing this process is: Ca(OH)₂ (aq) → Ca²⁺ (aq) + 2OH- (aq).
This depicts that calcium hydroxide is a base since it generates hydroxide ions (OH-) upon dissolution in water, which aligns with the countenance of a base as defined by Arrhenius. Because it dissociates completely in water solutions, it is acknowledged as a strong base.
The hydroxide ions (OH-) released into the solution are capable of combining with hydrogen ions (H+) to create water molecules. This reduces the solution's acidity and the concentration of free H+ ions, further signifying the behavior of a base.
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128 NA
175 N
Net Force:
Balanced or Unbalanced:
The net force is the vector sum of all the forces acting on an object. If the net force is not zero, it means the forces are unbalanced. In this case, the net force is 303 N.
Explanation:The net force is the vector sum of all the forces acting on an object. If the net force is zero, it means the forces are balanced and there is no change in the object's motion. If the net force is not zero, it means the forces are unbalanced and there will be an acceleration or deceleration of the object.
In this case, we have two forces given - 128 N and 175 N. To determine if the net force is balanced or unbalanced, we need to find the sum of these forces. Adding 128 N and 175 N gives us a net force of 303 N. Since the net force is not zero, the forces are unbalanced.
in a reaction between oxidant and reductant which will give up electrons and which will accept electron
Answer:
Explanation:
Any species that undergoes oxidation is itself a reducing agent or reductant.
The species that undergoes reduction in the course of a chemical reaction is an oxidant or reducing agent.
Oxidation is defined as the loss of electrons, addition of oxygen and increase in oxidation number of a specie. Reduction is the gain of electrons, removal of oxygen and decrease in oxidation number of a specie.Any specie that loses electrons to another undergoes oxidation and is a reductant.
Species that gains electrons are called oxidant.
NaClo3→
what is the reactant?
Answer:
NaClo3 is the reactant here.
Explanation:
In any chemical reaction there is reactant and product. The one that takes part in chemical reaction is called as reactant. For example:In the reaction below:
[tex]H_{2} + O_{2}[/tex] ----------------------> 2[tex]H_{2} O[/tex]
Here [tex]H_{2}[/tex] and [tex]O_{2}[/tex] are reactant, they take part in chemical reaction to form water as a product.
So the left hand side in a reaction equation always denotes the reactants. As in our question NaClo3 is in the left part of the reaction, it is the reactant.In ionic bonds, valence electrons are
Answer:
Valence Electrons are transferred/exchanged
In ionic bonds, valence electrons are transferred from one atom to another, leading to the formation of oppositely charged ions that attract each other to create the bond.
In ionic bonds, valence electrons are transferred from one atom to another. This process involves the movement of electrons from an atom that has a relatively low number of electrons in its valence shell (often a metal) to an atom with a higher affinity for electrons (often a nonmetal), which has a relatively high number of electrons in its valence shell or a few electrons short of completing its shell. Through this transfer, the atom losing electrons becomes a positively charged ion (cation), and the atom gaining electrons becomes a negatively charged ion (anion). This electrostatic attraction between the oppositely charged ions forms the ionic bond. For example, in the formation of sodium chloride (NaCl), sodium (Na) loses one electron to become Na⁺, while chlorine (Cl) gains that electron to become Cl⁻, resulting in a stable ionic compound.
The complete question is:
Fill in the blanks:
In ionic bonds, valence electrons are _______.
Specific Heat of Water = 4.186
J
g°C
Specific Heat of Ice = 2.00
J
g°C
Molar Heat of Fusion = 6030
J
mol
Molar Heat of Vaporization = 40790
J
mol
You take an ice cube (mass = 18g) from the freezer (T = -10°C) and place it on the table. Later that day, you notice a puddle of water on the table that has reached ambient room temperature (20°C). How much heat must have been absorbed to make this happen?
A) 1867.0 J
B) 2260.4 J
C) 7897.0 J
D) 42657.0 J
To calculate the total heat absorbed by an 18g ice cube going from -10°C to water at 20°C, you sum the heat needed to raise the temperature of the ice to 0°C, the heat of fusion to melt the ice, and the heat needed to raise the temperature of the resulting water to 20°C.
Explanation:The student is asking about the heat absorption process when an ice cube melts and warms up to ambient temperature. To find the total heat absorbed, you would calculate the heat needed to warm the ice from -10°C to 0°C, the heat required for the phase change from ice to water at 0°C, and then the heat needed to warm the water from 0°C to 20°C.
First, calculate the heat to warm the ice (Q1) using the formula Q = mcΔT, where m is the mass, c is the specific heat of ice, and ΔT is the temperature change. Then, calculate the heat to melt the ice (Q2) using the molar heat of fusion, given that the molar mass of water is approximately 18 g/mol. Finally, calculate the heat to warm the water (Q3) using the formula Q = mcΔT again, but this time with the specific heat of water.
The total heat (Qtotal) absorbed is the sum of Q1, Q2, and Q3. Note that in this example, the mass of ice and molar mass of water allows us to use a direct conversion from grams to moles for the heat of fusion calculation.
Analysis of a rock sample shows that it contains 6.25% of its original uranium-235. How old is the rock? How do you know?
Answer:
[tex]2.82\cdot 10^9 y[/tex]
Explanation:
A radioactive isotope is an isotope that undergoes nuclear decay, breaking apart into a smaller nucleus and emitting radiation during the process.
The half-life of an isotope is the amount of time it takes for a certain quantity of a radioactive isotope to halve.
For a radioactive isotope, the amount of substance left after a certain time t is:
[tex]m(t)=m_0 (\frac{1}{2})^{\frac{t}{\tau}}[/tex] (1)
where
[tex]m_0[/tex] is the mass of the substance at time t = 0
m(t) is the mass of the substance at time t
[tex]\tau[/tex] is the half-life of the isotope
In this problem, the isotope is uranium-235, which has a half-life of
[tex]\tau=7.04\cdot 10^8 y[/tex]
We also know that the amount of uranium left in the rock sample is 6.25% of its original value, this means that
[tex]\frac{m(t)}{m_0}=\frac{6.25}{100}[/tex]
Substituting into (1) and solving for t, we can find how much time has passed:
[tex]t=-\tau log_2 (\frac{m(t)}{m_0})=-(7.04\cdot 10^8) log_2 (\frac{6.25}{100})=2.82\cdot 10^9 y[/tex]
What are composites?
By integrating two or even more materials whose properties are quite distinctive is composite materials. The different materials work together to build special properties for the composite, but within the composite one can easily tell the various materials apart that they don't dissolve or mix together.
It is also recognized as Fiber-Reinforced Polymer (FRP) composites, which are constructed from a polymer matrix strengthened with engineered, man-made or natural fiber like glass, steel or aramid or other strengthening material.
Their high dimensional consistency helps them to preserve their shape, be it hot or cold, wet or dry. This renders them a common material for outdoor frameworks such as wind turbine blades.These have less resistance to cracking than metals but more durability than most polymers.A student wants to do scientific research on how aquatic plants in lakes have changed over time. What field of science does this research mostly involve?
Answer:
The right field is oceanography
A sample in the laboratory is found to contain 3.36 grams of hydrogen, 20.00 grams of carbon, and 26.64 grams of oxygen. The molecular mass is 180.156 g/mol. Determine both the empirical formula and the molecular formula.
Answer:
Empirical formula is CH₂O.
Molecular formula = C₆H₁₂O₆
Explanation:
Given data:
Mass of hydrogen = 3.36 g
Mass of carbon = 20.00 g
Mass of oxygen = 26.64 g
Molar mass of compound = 180.156 g/mol
Empirical formula = ?
Molecular formula = ?
Solution:
Empirical formula:
It is the simplest formula gives the ratio of atoms of different elements in small whole number
Number of gram atoms of H = 3.36 / 1.01 = 3.3
Number of gram atoms of O = 26.64 / 16 = 1.7
Number of gram atoms of C = 20 / 12 = 1.7
Atomic ratio:
C : H : O
1.7/1.7 : 3.3/1.7 : 1.7/1.7
1 : 2 : 1
C : H : O = 1 : 2 : 1
Empirical formula is CH₂O.
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass = CH₂O = 12×1 + 2× + 16
Empirical formula mass = 30
n = 180.156 / 30
n = 6
Molecular formula = n (empirical formula)
Molecular formula = 6 (CH₂O)
Molecular formula = C₆H₁₂O₆
If I add water to 100Ml of a 0.75 m NaOH solution until the final volume is 165 ml , what will the molarity of the diluted solution be?
Answer:
0.45M
Explanation:
The following were obtained from the question:
C1 = 0.75M
V1 = 100mL
V2 = 165mL
C2 =?
Applying the dilution formula C1V1 = C2V2, the concentration of the diluted solution can be calculated for as follows:
0.75 x 100 = C2 x 165
Divide both side by 165
C2 = (0.75 x 100) /165
C2 = 0.45M
The concentration of the diluted solution is 0.45M