试题与答案

(6分)已知气体X2和气体Y2在一定条件下能化合生成气体C,并知C的化学式只有三

题型:填空题

题目:

(6分)已知气体X2和气体Y2在一定条件下能化合生成气体C,并知C的化学式只有三种可能:XY、X2Y、X3Y。为确定C的化学,某同学分别取同温同压下,体积都为V1的X2和Y2两种气体充入一恒压、容积可变的密闭容器中,在一定条件下反应完全并恢复到原温后,再测出容器的容积(V2)。请填写下列结论与分析

(1)若实验结果(用V1、V2间关系来表示)是___________,则生成物C的化学式为XY,判断的依据是_____________________________________________________

(2)当生成物C的化学式为X2Y时,则实验结果是_____________,生成C的化学方程式为____________

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析:糖酵解过程中,丙酮酸还原为乳酸,由NADH+H+作为供氢体。所以答案选D。

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rule.

     During the 4th Winter Olympic Games a group of stamps were published in Germany in Novermber 1936.

The five rings of Olympics were drawn on the front of the sportswear. It was the first that the rings appeared

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     In the 1950's the stamps of these kind became more colorful.When the White Olympics came, the host

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( )3. The Winter Olympics is held once every four years.

(     )4. All the countries can publish stamps to mark the White Olympic Games.

( )5. We know that many Asian countries have held the White Olympics.

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题型:单项选择题

杭州碧溪公司与上海红光公司签订了一份买卖钢材的合同,约定杭州碧溪公司向上海红光公司购买钢材100吨,总价款40万元。合同约定:如本合同在履行过程中发生争议,由南京仲裁委员会进行仲裁。上海红光公司履行交货义务后,杭州碧溪公司到期未能支付货款。上海红光公司遂向南京仲裁委员会申请仲裁。

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