(Solved): 3) The empirical formula of sugar is CH2O and its molar mass is 180.2g/mole. If one teaspoon o ...

3) The empirical formula of sugar is ${\mathrm{CH}}_2\mathrm{O}$ and its molar mass is $180.2\mathrm{g}/\mathrm{mole}$. If one teaspoon of sugar weighs $3.50\mathrm{g}$, how many moles of sugar and how many molecules of sugar are present? 4) A hydrate of copper(II) sulfate is $25.5\%$ copper by mass. How many water molecules are there for each unit of copper(II) sulfate?