Question

Read the following description of the element zinc and indicate which are physical properties and which are chemical properties. Zinc is a silver-gray-colored metal that melts at $420^{\circ} \mathrm{C}$. When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. Zinc has a hardness on the Mohs scale of 2.5 and a density of $7.13 \mathrm{~g} / \mathrm{cm}^{3}$ at $25^{\circ} \mathrm{C}$. It reacts slowly with oxygen gas at elevated temperatures to form zinc oxide, $\mathrm{ZnO}$.

Name: Problem 18, Chapter 1: Chemistry The Central Science
Uploaded: 2023-09-01T11:54:03-08:00
Channel: Susan Hallstrom

   Read the following description of the element zinc and indicate which are physical properties and which are chemical properties. Zinc is a silver-gray-colored metal that melts at $420^{\circ} \mathrm{C}$. When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. Zinc has a hardness on the Mohs scale of 2.5 and a density of $7.13 \mathrm{~g} / \mathrm{cm}^{3}$ at $25^{\circ} \mathrm{C}$. It reacts slowly with oxygen gas at elevated temperatures to form zinc oxide, $\mathrm{ZnO}$.

Chemistry The Central Science

Theodore E. Brown,… 12th Edition

Chapter 1, Problem 18

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Solved by Expert Susan Hallstrom

09/01/2023

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These are properties that can be observed without changing the identity or composition of the substance. From the description, the physical properties of zinc are: - It is a silver-gray-colored metal. - It melts at $420^{\circ} \mathrm{C}$. - It has a hardness on Show more…

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Read the following description of the element zinc and indicate which are physical properties and which are chemical properties. Zinc is a silver-gray-colored metal that melts at $420^{\circ} \mathrm{C}$. When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. Zinc has a hardness on the Mohs scale of 2.5 and a density of $7.13 \mathrm{~g} / \mathrm{cm}^{3}$ at $25^{\circ} \mathrm{C}$. It reacts slowly with oxygen gas at elevated temperatures to form zinc oxide, $\mathrm{ZnO}$.

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Key Concepts

Physical Properties

Physical properties are characteristics that can be observed or measured without changing the substance's chemical identity. They include attributes such as color, melting point, density, and hardness which help describe the substance's state and behavior under various conditions.

Chemical Properties

Chemical properties describe the ways in which a substance reacts with other substances, resulting in a change in its chemical composition. These properties include reactivity with acids and oxygen, and the ability to undergo chemical reactions that form new compounds.

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