A gaseous mixture contains 0,256 g of hydrogen and 2.00 g of oxygen. The mole ratio of hydrogen to oxygen in the mixture is (H=1.00; O=16,0)

A. 1:1
B. 2:1
C. 1:4
D. 8:1

Correct Answer: Option B

B. 2:1

Explanation

Mole = Mass/MolarMas : Mass/MolarMass

0.256/2 : 2/32

0.128:0.0625

Divide through by the smallest.

(0.128/0.0625 : 0.0625/0.0625

2 : 1