NaHCO3（s）in a vacuum vessel decomposed partially to Na2CO3(s), H2O(g) and CO2(g), when it reached the following equilibrium :2NaHCO3(s) =Na2CO3(s)+H2O(g)+CO2(g), which one is true?
A、C=2,P=3,f=1;
B、C=3,P=2,f=3;
C、C=4,P=2,f=4;
D、C=2,P=2,f=2
发布时间：2025-09-04 21:59:37
