Question 9Compound is formed by 24 g of X and 64 g of oxygen. If atomic mass of X = 12 and O = 16, calculate the simplest formula of compound.

Question

Accepted Answer

ElementMass (g)Atomic massMolesSimplest ratioElement X24122412\dfrac{24}{12}1224​ = 222\dfrac{2}{2}22​ = 1Oxygen64166416\dfrac{64}{16}1664​ = 442\dfrac{4}{2}24​ = 2Simplest ratio of whole numbers = X : O = 1 : 2Hence, simplest formula of compound is XO2

Element	Mass (g)	Atomic mass	Moles	Simplest ratio
Element X	24	12	$\dfrac{24}{12}$ = 2	$\dfrac{2}{2}$ = 1
Oxygen	64	16	$\dfrac{64}{16}$ = 4	$\dfrac{4}{2}$ = 2

Mole Concept & Stoichiometry Miscellaneous Exercises — Question 9

Question 9