Answer:

Explanation:
The oxidation state of S is (-2) and that of Mg is (+2) since Mg loses two electrons to S
If all the reactants will react and become products, the mass will be 12.5 g. Because the mass of the matter amount will not change during the reaction.
C
He needs an battery to make the simple electromagnet
Answer:
Explanation:
Answer A
x-ray optical telescope.
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