Question

Calculate the mass in grams of each of the following species
A)Na atom
B) S atom
C)CH3CI molecule
D)Na2SO3 formula unit

Answer 1

(A)mass of Na atom=23grams
(B)mass of sulphur atom=32g
(C)mass of carbon atom =12g
mass of hydrogen atom=1g
mass of chlorine atom=35.5g
now , mass of CH3Cl=12+3×1+35.5=50.5g
(D)mass of oxygen atom =16g
mass of Na2SO3 =23×2+32+16×3=46+32+48=126g

Hope it helps