how many moles of ch4 are in 64.2 g ch4? lets begin by setting up our expression. what should we place in…

how many moles of ch4 are in 64.2 g ch4? lets begin by setting up our expression. what should we place in the green box? $\frac{64.2 g ch_4}{?}$ a. 16.05 g ch4 b. 1 mole ch4 enter the answer choice letter.

how many moles of ch4 are in 64.2 g ch4? lets begin by setting up our expression. what should we place in the green box? $\frac{64.2 g ch_4}{?}$ a. 16.05 g ch4 b. 1 mole ch4 enter the answer choice letter.

Answer

Explanation:

Step1: Find molar - mass of CH₄

The molar mass of CH₄: C has a molar mass of approximately 12.01 g/mol and H has a molar mass of approximately 1.01 g/mol. For CH₄, molar mass (M=(12.01 + 4\times1.01)\text{ g/mol}=16.05\text{ g/mol}). To convert grams of a substance to moles, we use the conversion factor (\frac{1\text{ mole}}{molar - mass}).

Step2: Determine the conversion factor

We want to convert 64.2 g of CH₄ to moles. The correct conversion factor is (\frac{1\text{ mole CH}_4}{16.05\text{ g CH}_4}). So, in the given setup (\frac{64.2\text{ g CH}_4}{\text{green box}}), the green box should have 16.05 g CH₄.

Answer:

A. 16.05 g CH₄