You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?

Verify by calculating that $5$ moles of ${\mathrm{CO}}_2$ and $5$ moles of ${\mathrm{H}}_2\mathrm{O}$ do not have the same mass.

Verify by calculating that $240 \mathrm{g}$ of calcium and $240 \mathrm{g}$ magnesium elements have a mole ratio of $3:5$.

Find the ratio by mass of the combining elements in the compound ${\mathrm{CaCO}}_3$_.

Find the ratio by mass of the combining elements in the compound ${\mathrm{MgCl}}_2$.

Find the ratio by mass of the combining elements in the compound ${\mathrm{H}}_2{\mathrm{SO}}_4$.

Find the ratio by mass of the combining elements in the compound ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$.

Find the ratio by mass of the combining elements in the compound ${\mathrm{NH}}_3$