Question

how many atoms of oxygen are present in 32g oxygen gas

Answer 1

Answer:

mol.mass=2×16=32u

No.of mole=32\32

=1 mole

Answer 2

Given: 32g If oxygen gas.

To find: We have to find the number of atoms.

Solution:

The number of atoms can be determined as follows-

The chemical formula of oxygen gas is $O_2$.

The atomic mass of an oxygen atom is 16g.

Thus the molecular mass of oxygen gas is 32g.

1 mole of oxygen gas is equal to 32 grams of oxygen gas.

1 mole of oxygen gas has $2×6.023×10^{23}=12.046×10^{23}$ number of atoms.

So, 32g of oxygen gas has $12.046×10^{23}$ number of atoms.