Question

Which of the following contains the largest mass of hydrogen atoms?

• A. $0.5$ moles $C_2{H}_2{O}_4$
• B. $1.1$ moles $C_3{H}_8{O}_3$
• C. $1.5$ moles $C_6{H}_8{O}_6$
• D. $4.0$ moles $C_3{H}_8{O}_3$

Answer 1

Answer: (D)

$4.0$ moles $C_3{H}_8{O}_3$

1 mole of $C_2{H}_2{O}_4⟶$2 moles of hydrogen=2 g of hydrogen

Thus 0.5 mole of $C_2{H}_2{O}_4$=1 g of hydrogen

1 mole of $C_3{H}_8{O}_3⟶$8 moles of hydrogen=8 g of hydrogen

Thus 1.1 moles of $C_3{H}_8{O}_3$=8.8 g of hydrogen

1 mole of $C_6{H}_8{O}_6⟶$8 moles of hydrogen=8 g of hydrogen

Thus 1.5 moles of $C_6{H}_8{O}_6$=12 g of hydrogen

1 mole of $C_2{H}_4{O}_2⟶$4 moles of hydrogen=4 g of hydrogen

Thus 4 moles of $C_3{H}_8{O}_3$=16 g of hydrogen

Thus 4 moles of $C_3{H}_8{O}_3$ contains the largest mass of hydrogen.

Hence, option $D$ is correct.