[单选题]
An ideal gas has a pressure of 2.5 af,7 jk1f;j)fauxfc6-do udd1b 7x2livs ,3 cmtm, a volume of 1.0 L at a temperatureo4zmbq5niwth0it( 0 : of $30 \; ^{\circ}C$. How many molecules are there in the gas?
A. $6.1 \times 10^{23}$
B. $6.0 \times 10^{22}$
C. $2.4 \times 10^{22}$
D. $2.3 \times 10^{23}$