Question

At what concentration (in ppm), is nitrogen present in the atmosphere?

(a) 780,840

(b) 390,420

(c) 78,084

(d) 900,000

The question was posed to me during an internship interview.

I need to ask this question from Atmosphere in portion Atmosphere & Greenhouse Gases of Environmental Engineering

Answer 1

Right choice is (a) 780,840

For explanation: Nitrogen constitutes 78% of the atmosphere. So 78% of one million = 780,840 ppm – is the concentration of nitrogen gas in the atmosphere.