Part A Read the following description of the element zinc and indicate which are physical properties and which are chemical properties. (a) Zinc melts at 420 ∘C. (b) When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. (c) Zinc has a hardness on the Mohs scale of 2.5 and a density of 7.13 g/cm3 at 25 ∘C. (d) It reacts slowly with oxygen gas at elevated temperatures to form zinc oxide, ZnO. Drag the items into the appropriate bins.

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Chemistry

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22 September, 22:14

Part A Read the following description of the element zinc and indicate which are physical properties and which are chemical properties. (a) Zinc melts at 420 ∘C. (b) When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. (c) Zinc has a hardness on the Mohs scale of 2.5 and a density of 7.13 g/cm3 at 25 ∘C. (d) It reacts slowly with oxygen gas at elevated temperatures to form zinc oxide, ZnO. Drag the items into the appropriate bins.

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Answers (1)

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Andrea Oneill · Answer 1

The physical properties are a and c.

The chemical properties are b and d.

Explanation:

A physical property is a property in which a chemical change is not necessary to know. A and C are therefore physical properties because no chemical change was necessary to know them.

A chemical property is a property in which a chemical change is necessary to know. B and D are therefore chemical properties because a chemical change was necessary to know them.