Question
How many moles of $\mathrm{SiO}_{2}$ are there in a quartz crystal $\left(\mathrm{Si} \mathrm{O}_{2}\right)$ that has a mass of $45.2 \mathrm{g} ?$
Step 1
The molar mass of silicon (Si) is approximately 28.09 g/mol and the molar mass of oxygen (O) is approximately 16.00 g/mol. Since there are two oxygen atoms in $\mathrm{SiO}_{2}$, we multiply the molar mass of oxygen by 2. Show more…
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