Principles of General Chemistry
3rd Edition
ISBN: 9780073402697
Author: SILBERBERG, Martin S.
Publisher: McGraw-Hill College
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Chapter 1, Problem 1.77P
Scenes A and B depict changes in matter at the atomic scale:
- Which show(s) a physical change? (b) Which show(s) a chemical change? (c) Which result(s) in different physical properties? (d) Which result(s) in different chemical properties? (e) Which result(s) in a change in state?
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Scenes A and B depict changes in matter at the atomic scale:
(a) Which show(s) a physical change?
(b) Which show(s) a chemical change?
(c) Which result(s) in different physical properties?
(d) Which result(s) in different chemical properties?
(e) Which result(s) in a change in state?
Two beakers contain clear, colorless liquids. When the contents of the beakers are mixed, a
white solid is formed. (a) Is this an example of a chemical or a physical change? (b) What would
be the most convenient way to separate the newly formed white solid from the liquid mixture—
filtration, distillation, or chromatography. Elaborate your answer.
7. State whether each of the following represents a chemical change or merely a physical change:(a) A few grams of sucrose (table sugar) are placed in a small beaker of deionized water; the sugar crystals “disappear,” and the liquid in the beaker remains clear and colorless.(b) A copper statue, over time, turns green.(c) When a teaspoon of baking soda (sodium bicarbonate) is placed into a few ounces of vinegar (acetic acid), volumes of bubbles (effervescence) are produced.
Chapter 1 Solutions
Principles of General Chemistry
Ch. 1 - Scenes A-D represent atomic-scale views of...Ch. 1 - Describe solids, liquids, and gases in terms of...Ch. 1 - Define physical property and chemical property....Ch. 1 - Define physical change and chemical change. State...Ch. 1 - Which of the following is a chemical change?...Ch. 1 - Which of the following changes can be reversed by...Ch. 1 - For each pair, which has higher potential energy?...Ch. 1 - Prob. 1.8PCh. 1 - How ait the key elements of scientific thinking...Ch. 1 - Prob. 1.10P
Ch. 1 - Prob. 1.11PCh. 1 - Prob. 1.12PCh. 1 - Prob. 1.13PCh. 1 - Write the conversion factor(s) for in2tom2 (b)...Ch. 1 - Write the conversion factor(s) for cm/mintoin/ (b)...Ch. 1 - Describe the difference between intensive and...Ch. 1 - Explain the difference between mass and weight....Ch. 1 - For each of the following cases, state whether the...Ch. 1 - Prob. 1.19PCh. 1 - A one-step conversion is sufficient to convert a...Ch. 1 - The average radius of a molecule of lysozyme, an...Ch. 1 - The radius of a barium atom is 2.2210-10 m. What...Ch. 1 - A small hole in the wing of a space shuttle...Ch. 1 - Prob. 1.24PCh. 1 - The average density of Earth is 5.5g/cm3. What is...Ch. 1 - Prob. 1.26PCh. 1 - The volume of a certain bacterial cell is 2.56m3....Ch. 1 - How many cubic meters of milk are in 1qt(946.4mL)?...Ch. 1 - Prob. 1.29PCh. 1 - An empty Erlenmeyer flask weighs 241.3 g. When...Ch. 1 - A small cube of aluminum measures 15.6 mm on a...Ch. 1 - A steek ball-bearing with a circumference of 32.5...Ch. 1 - Perform the following conversions: 68oF (a...Ch. 1 - Perfrom the following conversions: 106oF (the body...Ch. 1 - A 25-0-g sample of each of three unknwon metals is...Ch. 1 - Prob. 1.36PCh. 1 - The distance between two adjacent peaks on a wave...Ch. 1 - Prob. 1.38PCh. 1 - Prob. 1.39PCh. 1 - Prob. 1.40PCh. 1 - Each of the beakers depicted below contains two...Ch. 1 - Prob. 1.42PCh. 1 - Prob. 1.43PCh. 1 - Underline the significant zeros in the folliwng...Ch. 1 - Prob. 1.45PCh. 1 - Carry out the following calculations, making sure...Ch. 1 - Carry out the following calculations, making sure...Ch. 1 - Prob. 1.48PCh. 1 - Write the following numbers in scientific...Ch. 1 - Prob. 1.50PCh. 1 - Prob. 1.51PCh. 1 - Carry out each calculation, paying special...Ch. 1 - Carry out each calculation, paying special...Ch. 1 - Which statements include excat numbers? Angel...Ch. 1 - Which of the following include exact numbers? (a)...Ch. 1 - How long is the metal strip shown below? Be sure...Ch. 1 - These organic solvents are used to clean compact...Ch. 1 - Prob. 1.58PCh. 1 - Prob. 1.59PCh. 1 - Prob. 1.60PCh. 1 - Prob. 1.61PCh. 1 - Prob. 1.62PCh. 1 - Prob. 1.63PCh. 1 - Prob. 1.64PCh. 1 - Prob. 1.65PCh. 1 - Bromine is used to prepare the pesticide methyl...Ch. 1 - Prob. 1.67PCh. 1 - Prob. 1.68PCh. 1 - Prob. 1.69PCh. 1 - Prob. 1.70PCh. 1 - Prob. 1.71PCh. 1 - For the year 2007. worldwide production of...Ch. 1 - Prob. 1.73PCh. 1 - Prob. 1.74PCh. 1 - Prob. 1.75PCh. 1 - Prob. 1.76PCh. 1 - Scenes A and B depict changes in matter at the...Ch. 1 - Prob. 1.78PCh. 1 - Prob. 1.79PCh. 1 - If a temperature scale were based on the freezing...
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- Which of these changes are physical and which are chemical? Explain.(a) Plants make sugar from carbon dioxide and water. (b) Water vapor in the air forms frost. (c) A goldsmith melts a nugget of gold and pulls it into a wire?arrow_forwardScenes A–D represent atomic-scale views of different samples of substances: (a) Under one set of conditions, the substances in A and B mix, and the result is depicted in C. Does this represent a chemical or a physical change? (b) Under a second set of conditions, the same substances mix, and the result is depicted in D. Does this represent a chemical or a physical change? (c) Under a third set of conditions, the sample depicted in C changes to that in D. Does this represent a chemical or a physical change? (d) After the change in part (c) has occurred, does the sample have different chemical properties? Physical properties?arrow_forwardWhich of the following processes is a physical change? (a) evaporation of water; (b) combination ofhydrogen and oxygen gas to produce water; (c) dissolution of sugar in water; (d) separation of sodium chloride (table salt) into its constituentelements, sodium and chlorine; (e) combustion of sugar to produce carbon dioxide and water.arrow_forward
- You are given a hammer, a battery, a bulb, wires and switch.(a) How could you use them to distinguish between samples of metals and non- metals?(b) Asses the usefulness of these tests in distinguishing between metals and non-metals?arrow_forwardJudge the following statements as true or false. If you believea statement to be false, provide a corrected version.(a) Air and water are both elements.(b) All mixtures contain at least one element and onecompound.(c) Compounds can be decomposed into two or more othersubstances; elements cannot.(d) Elements can exist in any of the three states of matter.(e) When yellow stains in a kitchen sink are treated withbleach water, the disappearance of the stains is due to aphysical change.(f) A hypothesis is more weakly supported by experimentalevidence than a theory.(g) The number 0.0033 has more significant figures than 0.033.(h) Conversion factors used in converting units always havea numerical value of one.(i) Compounds always contain at least two different elements.arrow_forwardJudge the following statements as true or false. If you believea statement to be false, provide a corrected version.(a) Air and water are both elements.(b) All mixtures contain at least one element and onecompound.(c) Compounds can be decomposed into two or more othersubstances; elements cannot.(d) Elements can exist in any of the three states of matter.(e) When yellow stains in a kitchen sink are treated withbleach water, the disappearance of the stains is due to aphysical change.(f) A hypothesis is more weakly supported by experimentalevidence than a theory.(g) The number 0.0033 has more significant figures than 0.033.(h) Conversion factors used in converting units always havea numerical value of onearrow_forward
- Which of these changes are physical and which are chemical? Explain.(a) Plants make sugar from carbon dioxide and water.(b) Water vapor in the air forms frost.arrow_forwardClassify each property as physical or chemical. (a) the tendency for platinum jewelry to scratch easily(b) the ability of sulfuric acid to burn the skin(c) the ability of hydrogen peroxide to bleach hair(d) the density of lead relative to other metalsarrow_forwardClassify each property as physical or chemical. (a) the tendency of copper to turn green when exposed to air(b) the tendency of automobile paint to dull over time(c) the tendency of gasoline to evaporate quickly when spilled(d) the low mass (for a given volume) of aluminum relative to other metalsarrow_forward
- Two beakers contain clear, colorless liquids. When the contentsof the beakers are mixed a white solid is formed. (a) Isthis an example of a chemical or a physical change? (b) Whatwould be the most convenient way to separate the newlyformed white solid from the liquid mixture—filtration, distillation,or chromatography.arrow_forwardDecide whether each of the following processes is primarily a physical or a chem-ical change, and explain briefly:(a)Frost forms as the temperature drops on a humid winter night.(b)A cornstalk grows from a seed that is watered and fertilized.(c)A match ignites to form ash and a mixture of gases.(d)Perspiration evaporates when you relax after jogging.(e)A silver fork tarnishes slowly in air.arrow_forwardThe diagram in (a) shows a compound made up of atoms of two elements (represented by the green and red spheres) in the liquid state.Which of the diagrams in (b) to (d) represent a physical change, and which diagrams represent a chemical change?arrow_forward
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