Question

how many moles are in 36.04 grams of water (h2o)?

Explanation:

Step1: Calculate molar mass of water

The molar mass of hydrogen ($H$) is approximately 1 g/mol and oxygen ($O$) is approximately 16 g/mol. For $H_2O$, molar mass $M=(2\times1 + 16)$ g/mol = 18 g/mol.

Step2: Use mole - mass formula

The formula to calculate the number of moles $n$ is $n=\frac{m}{M}$, where $m$ is the mass and $M$ is the molar mass. Given $m = 36.04$ g and $M=18$ g/mol, then $n=\frac{36.04}{18}\approx2$ mol.

Answer:

2 moles