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Ch.1 - Introduction: Matter, Energy, and Measurement
All textbooksBrown 15th EditionCh.1 - Introduction: Matter, Energy, and MeasurementProblem 22b
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Chapter 1, Problem 22b

(b) Which properties of zinc can you describe from the photo? Are these physical or chemical properties?

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Physical Properties

Physical properties are characteristics of a substance that can be observed or measured without changing its chemical identity. Examples include color, melting point, boiling point, density, and conductivity. These properties help in identifying and describing materials based on their appearance and behavior under various conditions.
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Chemical Properties

Chemical properties refer to a substance's ability to undergo chemical changes and transform into different substances. These properties include reactivity with acids, bases, or other chemicals, flammability, and oxidation states. Understanding chemical properties is essential for predicting how a substance will interact in chemical reactions.
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Zinc Characteristics

Zinc is a transition metal known for its lustrous appearance, malleability, and resistance to corrosion. It exhibits both physical properties, such as a shiny, silver-gray color and a relatively low melting point, and chemical properties, such as reactivity with acids to produce hydrogen gas. Analyzing zinc's properties helps in applications ranging from galvanization to alloy production.
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Textbook Question

You are hiking in the mountains and find a shiny gold nugget. It might be the element gold, or it might be “fool’s gold,” which is a nickname for iron pyrite, FeS2. Which of the following physical properties do you think would help determine if the shiny nugget is really gold—appearance, melting point, density, or physical state?

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Textbook Question

In the process of attempting to characterize a substance, a chemist makes the following observations: The substance is a silvery white, lustrous metal. It melts at 649 °C and boils at 1105 °C. Its density at 20 °C is 1.738 g/cm3. The substance burns in air, producing an intense white light. It reacts with chlorine to give a brittle white solid. The substance can be pounded into thin sheets or drawn into wires. It is a good conductor of electricity. Which of these characteristics are physical properties, and which are chemical properties?

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Textbook Question

(a) Read the following description of the element zinc and indicate which are physical properties and which are chemical properties. Zinc melts at 420 °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 g/cm3 at 25 °C. It reacts slowly with oxygen gas at elevated temperatures to form zinc oxide, ZnO.

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Textbook Question

Label each of the following as either a physical process or a chemical process: b. boiling a cup of water

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Textbook Question

Label each of the following as either a physical process or a chemical process: c. pulverizing an aspirin

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Textbook Question

A match is lit and held under a cold piece of metal. The following observations are made: (a) The match burns. (b) The metal gets warmer. (c) Water condenses on the metal. (d) Soot (carbon) is deposited on the metal. Which of these occurrences are due to physical changes, and which are due to chemical changes?

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