A sample of air contains 78.08% Nitrogen, 20.94% oxygen and 0.980% Argon, by volume. How many moles of oxygen are present in 1.00L of the sample at 25.0 oC at 1.00 atm?
Note: if your answer is in exponential form just like this: 5.555 x 10-7,
express your answer in this form: 5.555E-7
1.00L = 1000ml = 1000g
20.94/100 × 1000
Molar Mass of Oxygen = 15.999
= 13.088 moles