Question

Molar mass of XH2 is 34 g/mole.What is the molar mass of XO3 ?​

Answer 1

XH2 = 34

X+ 2= 34 (since the molar mass of hydrogen is 1 and there are 2 hydrogen, so 2×1=2)

X=32

So, XO3= 32+16×3= 32+48= 80

Molar mass of XO3 is 80 g/mole.

Answer 2

Answer:

Mass of 1 mol of the compound is 34g.

out of 34g, 5.88 is hydrogen and 94.12 is

oxygen .

5.88 of 34 g = 1.992g ( 2g approx)

94.2 of 34 g = 32.008g ( 32g approx)

atomic mass of hydrogen is 1g and that of oxygen is 16g . So the compound has 2 atoms of hydrogen and 2 atoms of oxygen.

I hope it is helpfull