Calculating the mass of the earth's atmosphere

[dawn_pingpong]

Homework Statement

Given that the radius of the Earth is 6.4 x 10^6 m, the total mass of the Earth's atmosphere is approximately________kg?

Choices:
a) 5 E16
b) 1 E18
c)5 E18
d)1 E20
e) 5 E9

Homework Equations

What is the depth of the Earth's atmosphere? What is the density?

The Attempt at a Solution

 

[D H]

You don't need to know the depth of the Earth's atmosphere to answer this question, or it's density. What is the pressure at sea level? Pressure is what divided by what?

 

[dawn_pingpong]

OHHH okay. PA=F. Then can find mass. (divide by g) YAY thank you!