问题
选择题
在标准状况下，下列物质跟11.2 L氨气中所含氢原子数相同的是( )
A．标准状况下8.4 L CH4
B．49 g H3PO4
C．0.3 mol HCl
D．18 g H2O
答案
AB
此类试题可根据如下思路计算：
质量(或体积)→物质的量→分子数→原子数。
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在标准状况下，下列物质跟11.2 L氨气中所含氢原子数相同的是( )
A．标准状况下8.4 L CH4
B．49 g H3PO4
C．0.3 mol HCl
D．18 g H2O
AB
此类试题可根据如下思路计算：
质量(或体积)→物质的量→分子数→原子数。
How many men do housework? Recently a European commission(委员会) tried to find out people’s ideas and reactions to the women’s movement. As part of their survey(调查), they asked many men and women the question, “Who does the housework?” The men answered very differently from the women! The housework they asked people about was: preparing meals, washing dishes, cleaning the house and babysitting. 48% of British husbands said they did these things. 37% of Danish(丹麦的) men helped in the house. But only 15% of Italian men said they did the housework; many of them said they never helped at all! But there was an interesting point of view from the wives. According to British wives, only 38% of their husbands helped in the house. And Italian wives said that their husbands hardly ever helped. The Italian and British men did not tell the truth! The Commission found that Danish men were the most truthful husbands; their answers were the same as their wives’ answers. Do the men you know help in the house? Do you think the survey gives a true picture in your experience? Write and tell us what you think. 小题1: The survey was carried out in _______.
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