In an experiment during the analysis of a carbon compound, $145\,\,{\rm{mL of}}\,\,{{\rm{H}}_2}$ was collected at $760\,\,{\rm{mm Hg}}$ pressure and ${27^0}C$. The weight of ${H_2}$ is nearly :

NEET UG CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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In an experiment during the analysis of a carbon compound,

145\,\,\mathrm{mL of}\,\,{\mathrm{H}_2}

was collected at

760\,\,\mathrm{mm Hg}

pressure and

{27^0}C

. The weight of

{H_2}

is nearly :

View answer and explanation

Correct option: B

12\,\,\mathrm{mg}

Option B (12 mg) is correct because it is calculated using the ideal gas law to find the moles of H2 and then converting to mass.