Question

How many molecules are in 51.2 moles of water

Answer 1

To determine the number of molecules we must use Avogadro's relation, which tells us that in one mole of any substance there are 6.022 x10^23 molecules. Therefore, the molecules in 51.2 moles of water will be:

`\begin{gathered} MoleculesH_2O=givenmolH_2O*(6.022*10^(23)moleculesH_2O)/(1molH_2O) \\ MoleculesH_2O=51.2molH_2O*(6.022*10^(23)moleculesH_2O)/(1molH_2O)=3.08*10^(25)moleculesH_2O \end{gathered}`

Answer: In 51.2 moles of water there are 3.08x10^25 molecules