How many molecules are in 237 g (about a cup) of water?

Question

Quizplus · Accepted Answer

To find the number of molecules in 237 g of water, we first calculate the number of moles of water using its molar mass (approximately 18 g/mol). $237 \, \text{g} \div 18 \, \text{g/mol} = 13.17 \, \text{moles}$. Then, we use Avogadro's number ($6.022 \times 10^{23}$ molecules/mol) to find the total number of molecules: $13.17 \, \text{moles} \times 6.022 \times 10^{23} \, \text{molecules/mol} = 7.92 \times 10^{24}$ molecules.

How Many Molecules Are in 237 G (About a Cup)