Which of the following would weigh the highest?

MCQ

A
$0.2$ mole of sucrose $\left( C _{12} H _{22} O _{\ldots}\right)$
B
$2$ moles of $CO _2$
✓
$2$ moles of $CaCO _3$
D
$10$ moles of $H _2 O$

✓

Answer

Correct option: C.

$2$ moles of $CaCO _3$

$a.$ Mass of $1$ mole of sucrose $(12 \times 12)+(1 \times 22)+(16 \times 11)=342 g$
Mass of $0.2$ mole of sucrose $=342 \times 0.2=68.4 g$
$b.$ Mass of $1$ mole of $CO _2=12+(16 \times 2)=44 g$. Mass of $2$ moles of $CO _2=44 \times 2=88 g$
$c.$ Mass of $1$ mole of $CaCO _3=40+12+(16 \times 3)=100 g$
Mass of $2$ moles of $CaCO _3=100 \times 2=200 g$
$d.$ Mass of $1$ mole of $H _2 O =2+16=18 g$
Mass of $10$ moles of $H _2 O =18 \times 10=180 g$
Therefore, mass of $2$ moles of $CaCO _3$ is the highest, i.e., $200 g .$

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