MPSC Rajyaseva 2021 CSAT — Question 34
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10 ग्रॅम वायुरूप हायड्रोजनमध्ये H₂, मानक दाब आणि तापमानात हायड्रोजनचे _________ मोल असतात. 10 g of gaseous hydrogen H₂, at NTP/STP contain _________ mol of hydrogen.
1)10
2)5✓ Correct
3)1
4)0.1
Number of moles is calculated as given mass divided by molar mass. Molar mass of H2 is 2 g/mol. So, 10 g / 2 g/mol = 5 moles.
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[H = 1, C = 12, O = 16, I = 127]
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[H = 1, C = 12, O = 16, I = 127]
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