ICSE Class 10 Chemistry 2017 Solved Paper

A gas cylinder can hold $1 {\kg}$ of hydrogen at room temperature and pressure :

Question : 64 of 86

Marks: +1, -0

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.

Solution:

1 mole of any gas

=6.022 × 10^{23}

molecules 500 mole of hydrogen

=500 × 6.022 × 10^{23} \;\text " molecules "\;= {\X}

As the number of moles of hydrogen and

{\CO}_2

are the same.
The number of molecules of

{\CO}_2

\;= {\X}=500 × 6.022 × 10^{23}

\;=3011 × 10^{23} \;\text " molecules "\;

\;=3.011 × 10^{26} \;\text " molecules "\;

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