Question

Suppose you have a 100-gram sample of each of the following compounds. Which sample contains the largest number of moles of compound?

(A) chromium(III) chloride
(B) ammonia
(C) magnesium chloride
(D) phosphoric acid
(E) potassium chloride
(F) nitrogen trioxide
(G) methane
(H) propane
(I) lithium chlorate

Answer 1

Answer: Methane (G)

Explanation:

Find the approximate molar masses of each compound.

A) 52+3(35)=157

B) 14+1(3)=17

C) 24+35(2)94

D) 3+31+16(4)=98

E) 39+35=74

F) 14+16(3)=62

G) 12+4=16

H) 12(3)+8=44

I) 7+35+16(3)=90

Since methane has the least molar mass, it will have the most moles per 100 grams.