多项选择题
In an experiment, 7.81 g Al2O3 and excess HF(g) were
dissolved in 3.50 L of 0.141 M NaOH. If 28.2 g
Na3AlF6 was obtained, then what is the percent yield and theoretical yield for this experiment? Al2O3(s)+ 6 NaOH(aq)+12 HF(g)2→ 2Na3AlF6(s)+ 9 H2O(l)
A.0.816
B.0.8163
C.34.5g
D.34.55g