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【简答题】
用14C放射性同位素制备的AIBN引发合成的聚苯乙烯的平均聚合度为 1.52X10^4。测得AIBN在闪烁器中的放射性计数为9.81X10^7mol－1·min－1。而3.22g聚苯乙烯的放射活性计数为203min－1。试根据计算确定这一聚合反应的动力学链终止方式。
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参考答案：
举一反三
【单选题】Desperately short of living space and dangerously prone to flooding, the Netherlands plans to start building homes, businesses and even roads on water. With nearly a third of the country already cover...
A.
most parts of the country are covered by water
B.
the country is constantly threatened by floods
C.
it will promote the cultivation of flowers
D.
people think it better to live on water
【单选题】Mars fascinates scientists because of its similarity to Earth, and it fascinates the public because our myth of "Martians" is a vision of life beyond Earth. The Mars 62 continues with the launch of ...
A.
extremes
B.
extracts
C.
terminals
D.
radicals
【单选题】Mars fascinates scientists because of its similarity to Earth, and it fascinates the public because our myth of "Martians" is a vision of life beyond Earth. The Mars 62 continues with the launch of ...
A.
thus
B.
however
C.
so
D.
but
【单选题】下列有关物质分类正确的是①合物：盐酸、王水、水玻璃、水银②化合物：CaCl2、烧碱、聚苯乙烯、HD③电解质：H2SO4、胆矾、冰醋酸、硫酸钡④同素异形体：C60、C70、金刚石、石墨
A.
①③
B.
②④
C.
②③
D.
③④
相关题目：
【单选题】Desperately short of living space and dangerously prone to flooding, the Netherlands plans to start building homes, businesses and even roads on water. With nearly a third of the country already cover...
A.
most parts of the country are covered by water
B.
the country is constantly threatened by floods
C.
it will promote the cultivation of flowers
D.
people think it better to live on water
【单选题】Mars fascinates scientists because of its similarity to Earth, and it fascinates the public because our myth of "Martians" is a vision of life beyond Earth. The Mars 62 continues with the launch of ...
A.
extremes
B.
extracts
C.
terminals
D.
radicals
【单选题】Mars fascinates scientists because of its similarity to Earth, and it fascinates the public because our myth of "Martians" is a vision of life beyond Earth. The Mars 62 continues with the launch of ...
A.
thus
B.
however
C.
so
D.
but
【单选题】下列有关物质分类正确的是①合物：盐酸、王水、水玻璃、水银②化合物：CaCl2、烧碱、聚苯乙烯、HD③电解质：H2SO4、胆矾、冰醋酸、硫酸钡④同素异形体：C60、C70、金刚石、石墨
A.
①③
B.
②④
C.
②③
D.
③④
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