Question

calculate the number of atom in 0.2 mol molecule of hydrogen​?

Answer 1

Answer:

the no. of hydrogen atom will be 0.4×6×10^23.

Explanation:

in 1 mol of H2 the no of hydrogen molecules present=6.02×10^23

so the no of H atom present will be=2×6.02×10^23

because 1 molecule of hydrogen contain 2 hydrogen atoms

now 0.2 mol of hydrogen molecule will contain hydrogen atoms=0.2×2×6.02×10^23

=0.4×6.02×10^23.

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Answer 2

Answer:

Explanation:

Molar mass of H2 is 2g

2g of H2  Contains $6.023\times10^{23} molecules

200mg = 0.2 g

0.2 g of  H2  Contains --------?

=0.2×6.023×10232=6.023×1021 molecules

The number of molecules present in 0.2 g of  H2is2.737×1021