Answer:
1. NO2
2.49.4%
Step-by-step explanation:
1. Find the moles of each and divide by the smallest
N: 30/14=2.14/2.14=1
O: 62/16=3.875/2.14=1.81 (round to nearest whole number)
NO2
2. Find the total mass and divide by each
Total: 291.7167
There are 9 oxygens so multiply mass by 9
16*9=144
144/291.7167=0.493629607