If. 1.00km³ of air has a mass of 1.2 billion kg, what is the density of air in g/cm³?

Question

How did you get the answer?

Answer 1

Wow! We have to convert cubic kilometers to cubic centimeters! We have to convert kilograms to grams. Kilograms to grams is easy. There are 1,000 grams in a kilogram.

How many cubic centimeters in a cubic kilometer? Plenty, I'll bet. How many centimeters in a kilometer? 100,000.

So how many cubic centimeters in a cubic kilometer?

100,000 * 100,000 * 100,000 = 1,000,000,000,000,000

Here we go. The density of air in the original units is

1,200,000,000 kg / 1 km³

To convert to the desired units, we say

(1,200,000,000 kg / 1 km³) * (1 km³ / 1,000,000,000,000,000 cm³) * (1,000 g / 1 kg)

We can write the expression using scientific notation:

1.2E9 * 1.0E-15 * 1.0E3 = 1.2E-3 = .0012 g/cm³

Answer 2

i'm examining your subject as asserting that: The mass OF THE HELIUM is a million kg and The mass of that is container is negligible. If it floats, then the mass to volume ratio (density) is the same for the two the air and the balloon. a million.29 kg /a million m^3 = a million kg / x m^3 x = a million/a million.29 x ? 0.7752 .

Answer 3

(1.2 x10^9 kg/1 km^3)*(1000g/1kg)*(1km/1000m)^3*(1m/100cm)^3
=0.0012 g/cm^3

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