Question

Which of the following would weigh the most if the equal number of moles taken?

• A. $\text{sucrose}\left(C_{12}{H}_{22}{O}_{11}\right)$
• B. $N{O}_2$
• C. $CaC{O}_3$
• D. $H_{2}O$

Answer 1

The correct option is A

$\text{sucrose}\left(C_{12}{H}_{22}{O}_{11}\right)$

Number of moles$=\frac{\text{Total mass}}{\text{Molecular mass}}$

Let $X$ moles of each substance is taken

Total mass of $CaC{O}_3=X\times 100=100X$

Total mass of sucrose, $C_{12}{H}_{22}{O}_{11}=X\times 342=342X$

Total mass of $N{O}_2=X\times 46=46X$

Total mass of $H_{2}O=X\times 18=18X$