问题
选择题
在2L容器中发生反应N2＋3H2
2NH3，经一段时间后NH3的物质的量增加了2.4 mol，这段时间内用氢气表示的反应速率为0.6mol /（L·s），则这段时间为
A．6 s
B．4 s
C．3 s
D．2 s
答案
答案：C
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在2L容器中发生反应N2＋3H2 2NH3，经一段时间后NH3的物质的量增加了2.4 mol，这段时间内用氢气表示的反应速率为0.6mol /（L·s），则这段时间为
A．6 s
B．4 s
C．3 s
D．2 s
答案：C
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