阿伏加德罗常数约为6.02×1023 mol－1，下列叙述正确的是( )
| A．36gH2O和22.4LCO2中H和O，C和O之间的共价键均是4×6.02×1023 |
| B．0.1 L 3 mol·L－1的NH4NO3溶液中含有的NH4＋数目为0.3×6.02×1023 |
| C．常温常压下，4.6 g NO2气体含有0.1×6.02×1023个NO2分子 |
| D．0.1 mol的甲基(—CH3)和羟基(—OH)所含电子数均为0.9×6.02×1023 |
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