What is the unit of M in the equation PV = W M RT ?

According to the ideal gas equation; PV = nRT ; where P , V , n , R and T are pressure, volume, number of moles, universal gas constant and temperature of an ideal gas respectively. The number of moles, n = W M , where W M is grams per mole of the gas. Hence, its unit is g mol - 1 .

The molecular mass of methane ( CH 4 ) is 16 u . . What is the mass of 5 × 6 . 022 × 10 23 CH 4 molecules?

The molar mass of methane ( CH 4 ) is = 16 g Number of methane molecules = 5 × 6 . 022 × 10 23 1 mole of methane molecules = 6 . 022 × 10 23 So, number of moles of methane = 5 × 6 . 022 × 10 23 6 . 022 × 10 23 = 5 Moles = 5 Molar mass of methane = 16 g Mass = moles × molar mass Mass of 5 moles of methane molecules = 5 × 16 = 80 g .

The chemical equation for the manufacture of ammonia is N 2 ( g ) + 3 H 2 ( g ) → 2 NH 3 ( g ) Complete the following: 1 mol N 2 + ____ H 2 → ____ NH 3

1 mol N 2 + 3 mol H 2 → 2 mol NH 3 The balanced chemical equation tells us that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia.

The chemical equation for the manufacture of ammonia is N 2 ( g ) + 3 H 2 ( g ) → 2 NH 3 ( g ) Calculate the amount of H 2 required to react with 28 g of N 2 completely. [Molecular mass of N 2 = 28 u , H 2 = 2 u ]

The amount of H 2 required to react with 28 g of N 2 completely is: 28 g N 2 is equal to 1 mol N 2 1 mol of N 2 requires 3 mol of H 2 Hence, mass of H 2 = 3 × 2 g = 6 g

The balanced chemical equation for the formation of ammonia gas by the reaction between nitrogen gas and hydrogen gas is given. N 2 + 3 H 2 → 2 NH 3 Write the ratio between number of moles of reactants and products in the correct order.

Given balanced equation for the reaction is: N 2 + 3 H 2 → 2 NH 3 Form the reaction, number of moles of Nitrogen = 1, hydrogen = 3 and ammonia = 2 Therefore, Ratio between the number of moles of reactants and products is 1 : 3 : 2 This illustrates the Gay Lussac's law of combining volumes of gases.

MEDIUM

Earn 100

What is the molar volume of a gas at STP condition?

Important Questions on Function

MEDIUM

Chemistry>Relationships>Function>Mole Concept

A fixed mass of gas occupies a volume of

273 {cm}^{3}

at STP. At what pressure the above gas will occupy a volume of

300 {cm}^{3}

27 ° C

EASY

Chemistry>Relationships>Function>Mole Concept

The volume of one mole of any gas is _____ L.

MEDIUM

Chemistry>Relationships>Function>Mole Concept

The molecular mass of methane $({CH}_{4})$ is $16 u .$ .

Calculate the number of mole molecules in $160 g$ of ${CH}_{4}$ .

EASY

Chemistry>Relationships>Function>Mole Concept

What is the unit of

M

in the equation

PV = \frac{W}{M} RT

EASY

Chemistry>Relationships>Function>Mole Concept

4 g

NaOH

is dissolved in water and the volume is made up to

1 L

.
(1 mole of

NaOH = 40 g

)
(a) Calculate the molarity of the resultant solution.
(b) How will you make

1 M

solution of

NaOH

using the same amount (

4 g

) of

NaOH

MEDIUM

Chemistry>Relationships>Function>Mole Concept

What is the value of PV for

11.2

litre of an ideal gas at STP?

MEDIUM

Chemistry>Relationships>Function>Mole Concept

The molecular mass of methane $({CH}_{4})$ is $16 u .$ .

What is the mass of $5 \times 6.022 \times 10^{23} {CH}_{4}$ molecules?

EASY

Chemistry>Relationships>Function>Mole Concept

An ideal gas has pressure

P

, volume

V

and absolute temperature

T

. If

m

is the mass of each molecule and

K

is the Boltzmann constant then density of the gas is

EASY

Chemistry>Relationships>Function>Mole Concept

Atomic mass of nitrogen is

14 u

. Which of the following sample contain

6.022 \times 10^{23}

nitrogen atoms?

EASY

Chemistry>Relationships>Function>Mole Concept

The chemical equation for the manufacture of ammonia is $N_{2} (g) + 3 H_{2} (g) \to 2 {NH}_{3} (g)$

Complete the following:

$1 mol N_{2} +____H_{2} \to____{NH}_{3}$

MEDIUM

Chemistry>Relationships>Function>Mole Concept

Establish the ideal gas equation on the basis of Boyle’s law, Charles law and Avogadro’s law.

EASY

Chemistry>Relationships>Function>Mole Concept

The balanced chemical equation for the formation of ammonia gas by the reaction between nitrogen gas and hydrogen gas is given.

$N_{2} + 3 H_{2} \to 2 {NH}_{3}$

How many moles of ammonia are formed when 6 moles of $N_{2}$ reacts with 6 moles of $H_{2}$ ?

EASY

Chemistry>Relationships>Function>Mole Concept

A fixed mass of a gas occupies a volume of

520 {cm}^{3}

- 13 ° C

temperature. Keeping the pressure unchanged, when the gas is heated the volume of the gas increases to

700 {cm}^{3}

. What is the final temperature of the gas in degree celsius?

MEDIUM

Chemistry>Relationships>Function>Mole Concept

The pressure of a fixed mass of a gas at a temperature of

0 ° C

is doubled while the volume is halved. What will be the final temperature of the gas?

MEDIUM

Chemistry>Relationships>Function>Mole Concept

What is the product of pressure and volume of 2g of hydrogen at STP?

[H = 1]

EASY

Chemistry>Relationships>Function>Mole Concept

Equal masses of

H_{2}, O_{2}

and methane have been taken in a container of volume

V

at temperature

27^{o} C

in identical conditions. The ratio of the volumes of gases

H_{2} : O_{2} :

methane would be

EASY

Chemistry>Relationships>Function>Mole Concept

Modern vacuum pumps can evacuate a vessel down to a pressure of

4.0 \times 1 0^{- 15}

atm. at room temperature (300 K). Taking R = 8.3 JK^-1 mole^-1, 1 atm = 10⁵ Pa and

N_{Avogadro} = 6 \times 1 0^{23} {mole}^{- 1}

, the mean distance between molecules of gas in an evacuated vessel will be of the order of :

EASY

Chemistry>Relationships>Function>Mole Concept

The chemical equation for the manufacture of ammonia is $N_{2} (g) + 3 H_{2} (g) \to 2 {NH}_{3} (g)$

Calculate the amount of $H_{2}$ required to react with $28 g$ of $N_{2}$ completely.
[Molecular mass of $N_{2} = 28 u, H_{2} = 2 u$ ]

EASY

Chemistry>Relationships>Function>Mole Concept

The balanced chemical equation for the formation of ammonia gas by the reaction between nitrogen gas and hydrogen gas is given.

$N_{2} + 3 H_{2} \to 2 {NH}_{3}$

Write the ratio between number of moles of reactants and products in the correct order.

EASY

Chemistry>Relationships>Function>Mole Concept

The number of moles in $400 g$ ${CaCO}_{3}$ is _____ moles.

[Hint: Gram atomic masses: $Ca = 40 g, C = 12 g, O = 16 g$ ]

What is the molar volume of a gas at STP condition?

Important Questions on Function

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