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 × 10^23)
a. 16 × 10^18
c. 3.3 × 10^12
b. 6.6 × 10^12
d. 3.4 × 10^9
B
Physics & Space Science
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Fill in the blank(s) with correct word
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