At sea level, the weight of 1 cm2 of air is approximately 1 kilogram. This value, 1kg/ cm2    is also...

At sea level, the weight of 1 cm2 of air is approximately 1 kilogram. This value, 1kg/ cm2    is also known as the atmospheric pressure.  For this analysis, we will assume a featureless Earth without continents.  This will simplify but not significantly alters your calculations.

Question :  How much does the atmosphere weigh over each square meter of surface?  Express this in tonnes (units of 1000 kg).  Recall the conversion factors:  104 cm2 = 1m2, 1 tonne = 1000 kg = 106 g.