A Pressure of 1

Multiple Choice

A pressure of 1.0 x 10^-7 mm of Hg is achieved in a vacuum system.How many gas molecules are present per liter volume if the temperature is 293 K? (760 mm of Hg = 1 atm,R = 0.082 1 L*atm/mol*K,and N_A = 6.02 x 10²³)

A) 16 x 10¹⁸
B) 4.7 x 10¹⁶
C) 3.3 x 10¹²
D) 3.4 x 10⁹