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单选题
同温同压下，某气体的密度是氢气的16倍，该气体的化学式是（ ）．
A
CO2
B
NO
C
O2
D
SO2
参考答案
参考解析
解析：
由于该气体的密度是氢气的16倍，可知该气体的相对分子质量为32，A项，式量为44；B项，式量为30；C项，式量32；D项，式量为64．
由于该气体的密度是氢气的16倍，可知该气体的相对分子质量为32，A项，式量为44；B项，式量为30；C项，式量32；D项，式量为64．
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