Question

CALCULATE THE MASS OF ONE ATOM OF -:
a)oxygen (at mass 16) b)nitrogen ( at mass 14)

Answer 1

1) Molar mass of oxygen = 16 g mol^-1
$$\begin{gathered} \text{Mass of}6.022\times {10}^{23}\text{atoms of oxygen}=16\text{g} \\ \text{Mass of one atom}=\frac{16}{6.022\times {10}^{23}}=2.65\times {10}^{-23}\text{g} \end{gathered}$$


2) Molar mass of nitrogen = 14 g mol^{-1
$$\begin{gathered} Massof6.022\times {10}^{23}atoms=14g \\ Massof1atom=\frac{14}{6.022\times {10}^{23}}=2.32\times {10}^{-23}g \end{gathered}$$}