问题 填空题

写出下列化学反应的文字或符号表达式,并指出基本反应类型

(1)发出黄色火焰,产生大量白烟的反应______,______;

(2)用一种黑色固体和一种白色固体来制取氧气______,______;

(3)发出淡蓝色火焰,生成刺激性气味的气体的反应______;

(4)火星四射,生成黑色固体的反应______.

答案

(1)产生大量白烟是生成白色的固体,磷燃烧就是生成大量的白烟,文字表达式是写汉字,反应物是磷和氧气,写在箭头的左端,生成物是五氧化二磷写在箭头的右端,反应条件是点燃写在箭头的上边,反应物是两种,生成物是一种,属于化合反应;

(2)氯酸钾与二氧化锰可以制氧气,氯酸钾是白色,二氧化锰是黑色,反应物是氯酸钾,写在箭头的左端,生成物是氯化钾和氧气写在箭头的右端,反应条件是二氧化锰作催化剂加热写在箭头的上边和下边,反应物是一种,生成物是两种,属于分解反应;

(3)发出淡蓝色火焰,生成刺激性气味的气体,是硫在空气中燃烧的现象,所以反应物是硫和氧气,写在箭头的左端,生成物是二氧化硫写在箭头的右端,反应条件是点燃写在箭头的上边;

(4)火星四射,生成黑色固体是铁丝在氧气中燃烧的现象,所以反应物是铁和氧气,写在箭头的左端,生成物是四氧化三铁写在箭头的右端,反应条件是点燃写在箭头的上边.

故答案为:(1)磷+氧气

点燃
五氧化二磷;化合反应;(2)氯酸钾
二氧化锰
氯化钾+氧气;分解反应;(3)硫+氧气
点燃
二氧化硫;化合反应;(4)铁+氧气
点燃
四氧化三铁;化合反应.

解答题
填空题


How many of us would temp for three years while we waited for the perfect job Not many of us, perhaps. But Wentworth Miller, the "Prison Break" star, said he chose to wait even longer time (1) he found the right job.
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Miller comes from a (7) of teachers. He said he didn’t seem fated for a career in the arts, (8) his passion for acting. After (9) from Princeton with an English degree, he moved (10) his parents’ request to Los Angeles to look for a stable life. He started (11) in a little company that made television movies. This (12) simply faxing, filing, walking the boss’ dog and going to the store for the boss’ lunch. Every weekend during the summer, Miller (13) go to the office (14) he didn’t have air-conditioning. "I would hang (15) in the conference room and set up camp and rob the company kitchen," recalled Miller.
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