Solution (Problem 1)
Step 1: Calculate the molar mass of CH₄.
molar mass = (12.01 g/mol × 1) + (1.008 g/mol × 4)
molar mass = 16.042 g/mol
Step 2: Calculate the mass percent of each element in CH₄.
For %C
[tex]\% \: \text{C} = \frac{\text{12.01 g/mol × 1}}{\text{16.042 g/mol}} × 100[/tex]
[tex]\boxed{\% \: \text{C} = 74.87\%}[/tex]
For %H
[tex]\% \: \text{H} = \frac{\text{1.008 g/mol × 4}}{\text{16.042 g/mol}} × 100[/tex]
[tex]\boxed{\% \: \text{H} = 25.13\%}[/tex]
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