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Sidana [21]
3 years ago
12

How is a pure substance different from a mixture?

Chemistry
2 answers:
Sauron [17]3 years ago
7 0
The answer is A.
Pure substance is either an element or a compound, which elements in compund is chemically combined together. They cannot be separated by physical methods such as filtration or evaporation. Compounds can only be separated by chemical methods, which include using electricity (electrolysis) or applying heat.
Alexandra [31]3 years ago
4 0

the real answer is the




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 MgI2(s) →  Mg^2+(aq)   + 2I^-(aq)

when  magnesium iodide  but into water it dissociate/ ionize  completely  into  Mg^2+  and  2l^-   ions. Magnesium iodide dissociate/ionize  completely because  magnesium  iodide  is a strong electrolyte  which  dissociate/ ionize  completely into their ions  when it is put into   water .
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M Na2SO4 sln = 0.8448 M

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