Question

What will be the mass of O2 molecule in grams?

Answer 1

hy frnd..
this is ur ans:-


So, the molecular mass of O 2 willbe 2 X 16u = 32u. Thus ... mass of one moleculeof oxygen = [32 / (6.023 X 1023) ]g.

Answer 2

The mass of $\bold{O_2}$ molecule is $\bold{5.31 \times 10^{-23}}$ g

Explanation:

Element's molar mass can be defined as the mass of an atom in amu is also equal the mass (grams) of one mole of the substance.

The example is given below in the image.

The given molecule is $O_2$. The mass of oxygen atom is 16 u.

$\text{For} \ \mathrm{O}_{2} \text { molecule }=2 \times 16 \mathrm{u}=32 \mathrm{u}$

Therefore, the mass of $O_2$ molecule is 32 u.

Thus, in grams is,

$\Rightarrow \frac{M a s s}{\text { Avagadro constant }}=\frac{32}{6.023 \times 10^{23}}$

$\Rightarrow 5.31 \times 10^{-23} g$