What are 3 physical changes in a paper

Chemistry

2 answers:

kaheart [24]2 years ago

6 0

Answer:

You can rip it, cut out a shape, paint or color on it, or fold it in different ways. The paper might look different, but it is still paper.

Explanation:

bekas [8.4K]2 years ago

4 0

How can you make physical changes to a piece of paper? You can rip it, cut out a shape, paint or color on it, or fold it in different ways. The paper might look different, but it is still paper.

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How does a barometer predict the weather?

Lunna [17]

Answer:

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Explanation:

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2 years ago

N the reaction Mg + 2HCl -> MgCl2 + H2 which element’s oxidation number does not change?

BartSMP [9]

Answer:- Oxidation number of Cl does not change as it is -1 on both sides.

Explanations:- oxidation number of Mg on reactant side is 0 as it is in its elemental form(not combined with another element).

Oxidation number of hydrogen in its compounds is +1, so if H is +1 in HCl the oxidation number of Cl is -1 as the sum has to be zero.

On product side, Mg oxidation number is +2 as the oxidation number of alkaline earth metals in their compounds is +2.

Two Cl are present in magnesium chloride, so if Mg is +2 then Cl is -1.

Oxidation number of H on product side is 0 as it is present in its elemental for, $H_2$ ,