设NA为阿伏伽德罗常数的值。下列说正确的是
| A．高温下，0.2molFe与足量稀硫酸反应反应，生成的H2分子数目为0.3NA |
| B．78g过氧化钠中含阴离子数为2 NA |
| C．C2H4和N2组成的42g混合气体中原子的个数为3 NA |
D．5NH4 NO3 2HNO3+4N2↑+ 9H2O反应中，生成28gN2时，转移的电子数目为3.75NA |
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