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

Multiple Choice

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