Question

what is the mass in grams of 3.7 moles ch₄? select the correct answer below: 16 g 59 g 67 g 89 g

Explanation:

Step1: Calculate molar - mass of CH₄

The molar mass of C is 12 g/mol and H is 1 g/mol. For CH₄, molar mass \(M=(12 + 4\times1)\text{ g/mol}=16\text{ g/mol}\)

Step2: Use the mole - mass formula

The formula is \(m = n\times M\), where \(n = 3.7\text{ moles}\) and \(M = 16\text{ g/mol}\). So \(m=3.7\times16\text{ g}=59.2\text{ g}\approx59\text{ g}\)

Answer:

B. 59 g