# Calculating the mass of 3.50 moles of silicon dioxide

## Understanding the problem

We are given the number of moles of silicon dioxide and we need to calculate the mass of the compound. This problem involves using the molar mass of SiO2 to convert moles to grams.

## Solution

First, we need to determine the molar mass of silicon dioxide (SiO2).

**Molar mass of SiO2 = 60.09 g/mol**

Next, we can use the formula:

**Mass (g) = Number of moles x Molar mass**

Plugging in the values:

3.50 mol x 60.09 g/mol = **210. g**