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Why does zinc increase in weight in water?

Answer 1

You will have to rephrase this question.............

Of course zinc has a measurable density, #rho=7.14*g*cm^-3#. I know that modern methods of extraction of metal ores use froth floatation methods, but these often use oils as the separating medium.

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Answer 2

Avery Adams

The chemical process known as corrosion or oxidation produces zinc oxide and hydrogen gas, which causes zinc to increase in weight in water.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.