In a very good vacuum system in the laboratory

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

In a very good vacuum system in the laboratory, the vacuum attained was

10^{-13}

atm. If the temperature of the system was 300 K, the number of molecules present in a volume of

1 \text{ cm}^3

is (1)

2.4 \times 10^6

(2) 24 (3)

2.4 \times 10^9

(4) zero