Question

the molar mass of water (h₂o) is 18.0 g/mol. a sample of water has a mass of 18.0 g. how many moles of water are contained in this sample? 1.00 mole 18.0 moles 36.0 moles 324 moles

Explanation:

Step1: Recall the formula for moles

The formula for calculating the number of moles ($n$) is $n=\frac{m}{M}$, where $m$ is the mass and $M$ is the molar mass.

Step2: Substitute the given values

Given $m = 18.0\ g$ and $M=18.0\ g/mol$. Substitute into the formula: $n=\frac{18.0\ g}{18.0\ g/mol}$.

Step3: Calculate the number of moles

When we divide $18.0$ by $18.0$, we get $n = 1.00\ mol$.

Answer:

1.00 mole