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Topic starter
I am useless at maths, can someone help with the following :
At sea level, there are approximately 2.6 × 10(25 superscript) molecules
m-3 of the atmosphere.
One of the gases making up the atmosphere
has a concentration of 1.43 × 10(22 superscript) molecules
m-3. What is the concentration of this gas
expressed in parts per million (ppm)?
I know that i have to express 1.43 × 10(22 superscript) as a fraction of the total number of molecules and then turn this fraction into PPM.
help!!
Posted : 02/02/2011 3:24 pm
((1.43x10^22)/(2.6x10^25))x1,000,000
Posted : 02/02/2011 3:32 pm