Which of the following would weigh the highest?

Options

A. 0.2 mol of sucrose `(C_(12)H_(22)O_(11))`
B. 2 mol of `CO_(2)`
C. 2 mol of `CaCO_(3)`
D. 10 mol of `H_(2)O`

Answer

C

Explanation

Molecular mass (mass of 1 mole) of sucrose `(C_(12)H_(22)O_(11))=12xx12+22xx1+11xx16=342g`
Thus, mass of 0.2 mol `=342xx0.2=68.4g`
Mass of 1 mol of `CO_(2)=12+2xx16=44g`
Thus, mass of 2 mol of `CO_(2)=44xx2=88g`
Mass of 1 mol of `CaCO_(3)=40+12+3xx16=100g`
Thus, mass of 2 mol of `CaCO_(3)=10xx2=200g`
Mass of 1 mol of `H_(2)O=2xx1+16=18g`
Thus, mass of 10 mol of `H_(2)O=18xx10=180g`
From the above calculations, this is clear that 2 mol of `CaCO_(3)` weigh the most i.e., 200 g.