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Question: If N<sub>A</sub> is Avogadro's number, then the number of molecules in 6 g of hydrogen at NTP is –...

If NA is Avogadro's number, then the number of molecules in 6 g of hydrogen at NTP is –

A

2 NA

B

3 NA

C

NA

D

NA /6

Answer

3 NA

Explanation

Solution

1 mole H2 ¾® 2g of H2

So 6g H2 contain ¾® 3 mole of H2

1 mole ¾® N-molecules

So 3 mole ¾® 3N-molecules