Question

What is the mass of one mole of oxygen atom . Convert 12g of oxygen gas into mole.

Answer 1

a) Molar mass of oxygen atom = 16 g mol^-1​
Hence , mass of 1 mole of oxygen atom = 16 g

b) Given mass of oxygen = 12 g
$$\begin{gathered} Numberofmoles\left(n\right)=\frac{Givenmass}{Molarmass} \\ n=\frac{12}{16}=0.75moles \end{gathered}$$