Question
If $112 \mathrm{~g}$ of silicon (Si) react completely with $64 \mathrm{~g}$ of oxygen (O) to form silica $\left(\mathrm{SiO}_{2}\right)$, what is the atomic weight of silicon?
Step 1
First, we need to find the moles of oxygen in 64 g. The atomic weight of oxygen is 16 g/mol, so we have: moles of O = (64 g) / (16 g/mol) = 4 moles of O Show more…
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