Question

convert 25 grams of naoh to moles. show your work!
molar mass naoh = 40 g/mol

Explanation:

Step1: Recall the formula for moles

The formula to calculate moles ($n$) from mass ($m$) and molar mass ($M$) is $n = \frac{m}{M}$.

Step2: Identify the given values

Here, the mass of $\ce{NaOH}$ ($m$) is 25 g, and the molar mass of $\ce{NaOH}$ ($M$) is 40 g/mol.

Step3: Substitute the values into the formula

Substitute $m = 25$ g and $M = 40$ g/mol into the formula $n=\frac{m}{M}$. So, $n=\frac{25\ \text{g}}{40\ \text{g/mol}} = 0.625$ mol.

Answer:

The number of moles of $\ce{NaOH}$ is $\boldsymbol{0.625}$ mol.