Question

Which of the following has least mass? a) 2gram molecules of CO2 ,b)1.2044×10^24 molecule of CH3COOH ,c) 3 moles of NH2CONH2 ,d) 80 gram of CaCO3

Answer 1

(b) Mass of acetic acid= 60×2g = 120g
(c) Mass of urea= 3×60g=180g
So it is obvious that least mass is of CO2