At a pressure of one billionth (10⁻⁹) of atmospheric pressure, there are about 2.7 × 10¹⁰ molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter? A)2.7 × 10 ¹⁶ B)2.7 × 10 ¹⁴ C)2.7 × 10 ¹² D)2.7 × 10 ⁸ E)2.7 × 10 ⁴

Question

Quizplus · Accepted Answer

Since 1 cubic meter is equal to 10^6 cubic centimeters, to convert the number of molecules per cubic centimeter to per cubic meter, you multiply by 10^6. Therefore, 2.7 × 10^11 molecules/cm^3 becomes 2.7 × 10^(11+6) = 2.7 × 10^17 molecules/m^3.

At a Pressure of One Billionth (10−9) of Atmospheric Pressure

At a Pressure of One Billionth (10⁻⁹) of Atmospheric Pressure