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A gas cylinder can hold 1 kg of hydrogen...

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

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If the number of molecules of hydrogen is X, then number of molecules of carbon dioxide will also be X.
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ICSE-SAMPLE PAPER 2017-SECTION-II
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  2. A gas cylinder can hold 1 kg of hydrogen at room temperature and press...

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  3. A gas cylinder can hold 1 kg of hydrogen at room temperature and press...

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