Calculate the number of moles of 70.0 g of NaOH. Molar mass of NaOH is 40.0 g/mol

1. Break Down the Problem

To find the number of moles of NaOH, we need to use the relationship between mass, molar mass, and the number of moles. The formula is:

$\text{Number of moles} = \frac{\text{Mass (g)}}{\text{Molar mass (g/mol)}}$

2. Relevant Concepts

• Mass of NaOH: 70.0 g
• Molar mass of NaOH: 40.0 g/mol

3. Analysis and Detail

Using the formula, we will substitute the values we have:

$\text{Number of moles} = \frac{70.0 \, \text{g}}{40.0 \, \text{g/mol}}$

4. Verify and Summarize

Now, we will perform the calculation:

$\text{Number of moles} = \frac{70.0}{40.0} = 1.75 \, \text{mol}$

Final Answer

The number of moles of NaOH in 70.0 g is 1.75 mol.