Nitrous oxide, N 2 O , has a mass ratio of nitrogen to oxygen of 1.00 : 0.57 . Determine the ratio by mass of nitrogen to oxygen in dinitrogen trioxide, N 2 O 3 , and dinitrogen pentoxide, N 2 O 5 . N 2 O 3 has a mass ratio of nitrogen to oxygen of 1.00 : N 2 O 5 has a mass ratio of nitrogen to oxygen of 1.00 :

Explanation:

1.

Mass ratio: 1.00 : 0.57 (given)

Represent the atomic mass of N by x and the atomic mass of O by y, then:

2.

Using x and y for the corresponding atomic masses, the mass ratio of is:

Use x/y = 1/1.14

Divide both numerator and denominator by 2:

3.

Using x and y for the corresponding atomic masses, the mass ratio of is:

Use x/y = 1/1.14

Divide both numerator and denominator by 2:

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