how many grams are in 1.8 moles of ch₄?\n28.8 grams\n20.8 grams\n22 grams\n30 grams

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 $M=(1\times12)+(4\times1)=16$ g/mol.

Step2: Use the formula $m = n\times M$

Given $n = 1.8$ moles and $M = 16$ g/mol. Then $m=1.8\times16 = 28.8$ g.

Answer:

28.8 grams