# How many grams are in 4 moles of NaOH? a) 160 grams b) 40 grams c) 4 grams d) 14 grams

## Question:

How many grams are in 4 moles of NaOH?

a) 160 grams

b) 40 grams

c) 4 grams

d) 14 grams

## Mass:

The molar mass is desired in a similar or relatable way like the moles are desired for the assessment of the weight of solute or the mass of the solute.

## Answer and Explanation: 1

**Given Data:**

- The moles of NaOH is 4 mol.

The molar mass of NaOH is 40 g/mol.

The mass of NaOH can be calculated as shown below.

{eq}{\rm{Mass}} = {\rm{Moles}} \times {\rm{Molar}}\;{\rm{mass}} {/eq}

Substitute the respective values in the above equation.

{eq}\begin{align*} {\rm{Mass}} &= {\rm{4}}\;{\rm{mol}} \times {\rm{40}}\;{\rm{g/mol}}\\ &= 160\;{\rm{g}} \end{align*} {/eq}

Therefore, the correct option is **a)**.

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Chapter 9 / Lesson 3Learn to define and explain what stoichiometry is. Learn how to convert mass to mass in stoichiometry. Discover stoichiometry mass to mass and mole to mass problems.