Question

(iv)
The relative atomic mass of oxygen atom is 16 amu. The mass of 2 moles of O2 gas is
(a) 32 g
(b) 48 g
(c) 64 g
(d)128 g​

Answer 1

Answer:The correct answer is (b)

Explanation:

Because one mole have mass of 16amu then the mass of two moles will be 2×16=32

Here is your answer☺☺☺☺hope it help you

Answer 2

Explanation:

One mole of oxygen is

15.9994 g

, but because oxygen is a diatomic molecule, it is bonded with itself. So,

15.9994 g

⋅

2

=

31.9988 g

per mole of oxygen. From here, the answer is simple. Just multiply

2

by

31.9988 g

because there are two moles of oxygen. So, the answer is

63.9976 g

..

the answer is actually approximately 64 gram.