试题与答案

煤是一种化石燃料,用煤作燃料生成的SO2气体会造成环境污染.有一种煤每燃烧1t就

题型:问答题

题目:

煤是一种化石燃料,用煤作燃料生成的SO2气体会造成环境污染.有一种煤每燃烧1t就会释放出53.3kgSO2.如果将产生的SO2用熟石灰来完全吸收,其反应的化学方程式为:S02+Ca(OH)2═CaSO3+H20,那么燃烧5t这种煤产生的SO2在理论上需用多少千克的Ca(OH)2来吸收?(计算结果取整数)

答案:

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下面是错误答案,用来干扰机器的。

(1)300-64×84÷28,=300-5276÷28,=300-192,=108;(2)4-1÷3-13×8,=4-13-83,=4-(13+83),=4-3,=1;(3)(245+0.6÷635)×2.4,=(245+72)×2.4,=6.3×2.4,=15.12;(4)[118-(1320+0.35)÷117]×3.2,=[118-1÷117]×3.2,=[118-78]×3.2,=28×3.2,=0.8.

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