20.

Chemistry

2 answers:

sergiy2304 [10]3 years ago

8 0

I think the anwser is A

tensa zangetsu [6.8K]3 years ago

8 0

Answer:

Maybe A

Explanation:

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3 years ago

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An expanding balloon with the increased evolution of gas is a good visible practical sign in the experiment on the conservation of matter in the reaction. As the magnesium disappears with an increased input of hydrochloric acid, the balloon gets bigger showing that more hydrogen is evolved from the reaction;

2HCL + Mg  MgCl2 + H2

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