Question

А SECTION Q.1. Which of the following has maximum mass? • 12.98 x 100 atoms of Nitrogen • 35 x 10 -- moles of O, * Two milligrams of Carbon • 11.2 ml of H2 ​

Answer 1

Answer:

(a) 1 mole of nitrogen atoms=1×mass of N=1×14=14 g

(b) 4 moles of aluminium atoms=4×27=108 g

(c) 10 moles of sodium sulphite(Na

2

SO

3

)=10×Mass of Na

2

SO

3

.

Mass of Na

2

SO

3

=2×Mass of Na atom+1×Mass of S atom+3×Mass of O atom

=2×23+1×32+3×16=46+32+48=126 g/mol

∴10 moles of Na

2

SO

3

=10×126=1260 g