Question

Calculate the number of molecules in 0.000756 grams of gaseous oxygen

Answer 1

Solution.

$\frac{m}{M} = \frac{N}{Na}$

$N=\frac{m \times Na}{M}$

$N=1.42 \times 10^{19}$

Answer:

$N=1.42 \times 10^{19}$