Question

15. The number of hydrogen atoms if percentage composition of it in 16g of gre is 25. A) No B) 2N C) 3N D) 4N 1. 1. ​

Answer 1

Explanation:

Moles of O

2

=

32

16

=

2

1

Number of molecules =

2

1

×N

A

Number of atoms = 2×

2

1

×N

A

Answer 2

$\boxed{\bf\pink{Moles \: of O2 = \frac{16}{32} = \frac{1}{2} }}$

$\boxed{\bf\pink{ Number \: of \: molecules = \frac{1}{2} \times NA }}$

$\boxed{\bf\red{Number \: of \: atoms =2 \times \frac{1}{2}NA}}$