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质量守恒定律是初中化学中的一条重要规律．请利用质量守恒定律的相关知识回答下列问题． （1）蜡烛在空气中充分燃烧时，产物为二氧化碳和水，则蜡烛中一定含有的元素是______（用元素符号填空），理由是______． （2）将ag氯酸钾与bg 二氧化锰充分混合、加热，待完全反应后，称得剩余固体质量为cg．由以上信息可知：生成物中氯化钾的质量为______g，氧气的质量为______g． （可能用到的相对原子质量：K-39；Cl-35.5；O-16；Mn-55）
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相关题目：
【单选题】My best friend is good at ________.
A.
sing
B.
sings
C.
singing
D.
sang
查看完整题目与答案
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A.
Love is something that you can't wait for.
B.
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C.
Love is everything you need in life.
D.
Love is fun that everyone should experience.
查看完整题目与答案
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A.
said
B.
murmured
C.
used
D.
sang
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A.
In
B.
on
C.
On
查看完整题目与答案
【单选题】Love is like an avalanche where you have to run for your life.
A.
Love is something that you can ’ t wait for.
B.
Love is dangerous and you should run away from it as soon as you can.
C.
Love is everything you in life.
D.
Love is fun that everyone should experience.
查看完整题目与答案
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B.
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C.
②③
D.
②④
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【简答题】It is not easy for people to sail (航海) around the world in quite small boats. Sometimes the weather gets bad. Accidents can happen easily and quickly. One family once had an accident. A big fish swam ...
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