Question

which one of the following contains the most moles of hydrogen atoms? answer: a 5 mol of c₂h₆ b 10 mol ch₃oh c 15 mol h₂ d 7 mol c₂h₄

Explanation:

Step1: Calculate moles of H in A

In \(C_2H_6\), 1 molecule has 6 H atoms. So for 5 mol \(C_2H_6\), moles of H = \(5\times6 = 30\) mol.

Step2: Calculate moles of H in B

In \(CH_3OH\), 1 molecule has 4 H atoms. So for 10 mol \(CH_3OH\), moles of H = \(10\times4 = 40\) mol.

Step3: Calculate moles of H in C

In \(H_2\), 1 molecule has 2 H atoms. So for 15 mol \(H_2\), moles of H = \(15\times2 = 30\) mol.

Step4: Calculate moles of H in D

In \(C_2H_4\), 1 molecule has 4 H atoms. So for 7 mol \(C_2H_4\), moles of H = \(7\times4 = 28\) mol.

Answer:

B. \(10\space mol\space CH_3OH\)