(ii) A gas cylinder can hold $1 kg$ of hydrogen at room temperature and pressure.
(a) Find the number of moles of hydrogen present.

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Solution

Given information
$1 kg$ of hydrogen
Relationship used for the conversion of kg to g
$1 kg = 1000 g$
Calculation of molecular weight of $H_{2}$
Molecular weight of $H_{2}$
$= 2 H = 2 \times 1 g = 2 g$
Calculation of number of moles of $H_{2}$
$2 g$ of hydrogen gas contains $1 mole$ of $H_{2}$
$1000 g$ of hydrogen gas contains $\frac{1}{2} \times 1000 =500moles$ of $H_{2}$
Hence, $500 moles$ of hydrogen gas are present.

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Similar questions

A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure

(a) What mass of carbon dioxide can it held under the similar condition of temperature and pressure?

(b) If the number of molecules of hydrogen in the cylinder is X, calculate the number of carbon dioxide molecules in the cylinder. State the law that helped you to arrive at the above result.

(ii) A gas cylinder can hold $1 kg$ of hydrogen at room temperature and pressure.

(c) If the number of molecules of hydrogen in the cylinder is $X$ , calculate the number of ${CO}_{2}$ molecules in the cylinder under the same conditions of temperature and pressure.

Q. A gas cylinder can hold

1 k g

of hydrogen at room temperature and pressure:
If the number of molecules of hydrogen in the cylinder is

X

, calculate the number of

C O_{2}

molecules in the cylinder under the same conditions of temperature and pressure.

(ii) A gas cylinder can hold $1 kg$ of hydrogen at room temperature and pressure.

(d) State the law that helped you to arrive at the above result.

(ii) A gas cylinder can hold $1 kg$ of hydrogen at room temperature and pressure.

(b) What weight of ${CO}_{2}$ can the cylinder hold under similar conditions of temperature and pressure?

$[H = 1, C = 12, O = 16]$

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(ii) A gas cylinder can hold 1kg of hydrogen at room temperature and pressure.(a) Find the number of moles of hydrogen present.

(ii) A gas cylinder can hold $1 kg$ of hydrogen at room temperature and pressure.
(a) Find the number of moles of hydrogen present.