A pressure of 2.0 *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 = 0.0821 L · atm/mol · K, and NA = 6.02 *1023)
A) 16 * 1018
B) 6.6 * 1012
C) 3.3 *1012
D) 3.4 *109
Correct Answer:
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