Use the dropdowns to indicate whether each of the following statements is True or False. An element is a pure substance. A homogeneous mixture has uniform composition and appears visually the same throughout. -- V A heterogenous mixture has composition that varies from point to point. A compound can be broken down into simpler substances by physical changes. --

Use the dropdowns to indicate whether each of the following statements is True or False. An element is a pure substance. A homogeneous mixture has uniform composition and appears visually the same throughout. -- V A heterogenous mixture has composition that varies from point to point. A compound can be broken down into simpler substances by physical changes. --

General, Organic, and Biological Chemistry

7th Edition

ISBN:9781285853918

Author:H. Stephen Stoker

Publisher:H. Stephen Stoker

Chapter1: Basic Concepts About Matter

Section: Chapter Questions

Problem 1.33EP: Indicate whether each of the following statements is true or false. a. Both elements and compounds...

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Similar questions

Which of the following is not characteristic of a pure substance? (a) Has a uniform composition throughout (b) Has a fixed melting temperature (c) Can be separated into two other pure substances
Classify each of the following statements as true or false. a. All heterogeneous mixtures must contain three or more substances. b. Pure substances cannot have a variable composition. c. Substances maintain their identity in a heterogeneous mixture but not in a homogeneous mixture. d. Pure substances are seldom encountered in the everyday world.
Indicate whether each of the following statements is true or false. a. Both elements and compounds are pure substances. b. A compound results from the physical combination of two or more elements. c. In order for matter to be heterogeneous, at least two compounds must be present. d. Compounds, but not elements, can have a variable composition.
Sketch a magnified view (showing atoms and/or molecules) of each of the following, and explain why the specified type of mixture is a heterogeneous mixture of two different compounds. a homogeneous mixture of an element and a compound.
From the information given, classify each of the pure substances A through D as elements or compounds, or indicate that no such classification is possible because of insufficient information. a. Substance A cannot be broken down into simpler substances by chemical means. b. Substance B cannot be broken down into simpler substances by physical means. c. Substance C readily dissolves in water. d. Substance D readily reacts with the element chlorine.
Consider two boxes with the following contents: the first box contains 10 blue paper clips and 10 red paper clips; the second contains the same number of each color of paper clip with the difference that each blue paper clip is interlocked with a red paper clip. Which box has contents that would be an analogy for a mixture, and which box has contents that would be an analogy for a compound?
All of the following processes involve a separation of either a mixture into substances or a compound into elements. For each, decide whether a physical process or a chemical reaction is required. a Sodium metal is obtained from the substance sodium chloride. b Iron filings are separated from sand by using a magnet. c Sugar crystals are separated from a sugar syrup by evaporation of water. d Fine crystals of silver chloride are separated from a suspension of the crystals in water. e Copper is produced when zinc metal is placed in a solution of copper(II) sulfate, a compound.
Iced Tea Use iced tea with and without ice cubes as examples to explain homogeneous and heterogeneous mixtures. If you allow all of the ice cubes to melt, what type of mixture remains?
Classify each of these as an element, a compound, a heterogeneous mixture, or a homogeneous mixture. Explain your choice in each case. (a) Chunky peanut butter (b) Distilled water (c) Platinum (d) Air
Classify each of the following as a heterogeneous mixture, homogeneous mixture, or a pure substance. Also indicate how many phases are present, assuming all components are present in the same container. a. Water and dissolved salt b. Water and sand c. Water, ice, and oil d. Water, dissolved sugar, and undissolved sugar
Assign each of the following descriptions of matter to one of the following categories: element, compound, or mixture. a. one substance present, one phase present, one kind of homoatomic molecule present b. two substances present, two phases present, all molecules present are heteroatomic c. one phase present, two kinds of homoatomic molecules are present d. triatomic, homoatomic, and diatomic heteroatomic molecules are present
a Which of the following substances would you expect to be elements and which would you expect to be compounds? 1 calcium carbonate; 2 arsenic; 3 uranium; 4 potassium chloride; 5 chloromethane. b On what general rule do you base your answers to part a? Can you name any exceptions to this general rule?