The number of molecules in 16g of methane is:

Explanation

To find the number of molecules in 16 grams of methane (CH₄), we can follow these steps:

### Step 1: Determine the molecular weight of methane
The molecular formula for methane is CH₄. To find its molecular weight, we add the atomic weights of carbon and hydrogen:
- Carbon (C) has an atomic weight of approximately 12 g/mol.
- Hydrogen (H) has an atomic weight of approximately 1 g/mol. Since there are four hydrogen atoms in methane, we multiply by 4.

So, the molecular weight of methane (CH₄) is:
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