Question

Magnesium and oxygen combine in the ratio of 3:2 by mass to form magnesium oxide. What mass of oxygen gas would be required to react completely with 24 gram of magnesium? Which law of chemical combination will govern your answer?

Answer 1

$$\begin{gathered} \text{Hi,} \\ \text{Magnesium and oxygen combines to form magnesium oxide in the ratio 3: 2} \\ \mathrm{It}\mathrm{follows}\mathrm{law}\mathrm{of}\mathrm{constant}\mathrm{proportion} \\ 3\mathrm{g}\mathrm{of}\mathrm{magnesium}\mathrm{combimes}\mathrm{with}2\mathrm{g}\mathrm{of}\mathrm{oxygen} \\ 24\mathrm{g}\mathrm{of}\mathrm{magnesium}\mathrm{combimes}\mathrm{with}\frac{2}{3}\times 24\mathrm{g}\mathrm{of}\mathrm{oxygen}=16\mathrm{g}\mathrm{of}\mathrm{oxygen} \\ \mathrm{Regards} \end{gathered}$$