[化學] 普化
1.The mole fraction of sodium hydroxide in a saturated aqueous is 0.310 .
What is the molality of the solution?
(A)0.301m (B)0.690m (C)1.24m (D)12.4m (E)25.0m
2.Which of the following is accturate comparison of the properties of
nitrogen and oxygen?
(A)Nirtogen is more reactive than oxygen.
(B)Nitrogen does not form naturally-occurring ompounds,but oxygen does.
3.Account for the following facts:
(a)CaF2 is insoluble in water,but NaF is quite soluble.
(b)Molten BeCl2 is a poor electrical condunctor,whereas molten CaCl2 is an
excellent one.
找了很久,實在不懂
@ @有點多~謝謝各位
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推
05/16 19:52, , 1F
05/16 19:52, 1F
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05/16 19:55, , 2F
05/16 19:55, 2F
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05/16 19:56, , 3F
05/16 19:56, 3F
推
05/17 00:42, , 4F
05/17 00:42, 4F
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05/17 00:44, , 5F
05/17 00:44, 5F
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05/17 00:45, , 6F
05/17 00:45, 6F
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05/17 00:46, , 7F
05/17 00:46, 7F
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05/17 00:47, , 8F
05/17 00:47, 8F
推
05/17 01:05, , 9F
05/17 01:05, 9F
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