Question 1(v)Which of the following would weigh the most?1 mole of H2O1 mole of CO21 mole of NH31 mole of CO

Question

Accepted Answer

1 mole of CO2Reason — Since each molecule is 1 mole, the weight depends entirely on molar mass.MoleculeMolecular MassH2O1 x 2(H) + 16(C)= 18 g/molCO212(c) + 16 x 2(O)= 44 g/molNH314(N) + 1 x 3(H)= 17 g/molCO12(C) + 16(O)= 28 g/molSo, 1 mole of CO2 has molecular mass of 44 g/mol, hence, weigh the most.

Molecule	Molecular Mass
H₂O	1 x 2(H) + 16(C) = 18 g/mol
CO₂	12(c) + 16 x 2(O) = 44 g/mol
NH₃	14(N) + 1 x 3(H) = 17 g/mol
CO	12(C) + 16(O) = 28 g/mol

Model Paper 1 — Question 5

Question 1(v)