Principles of General Chemistry
3rd Edition
ISBN: 9780073402697
Author: SILBERBERG, Martin S.
Publisher: McGraw-Hill College
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Textbook Question
Chapter 1, Problem 1.4P
Define physical change and chemical change. State which type of change occurs in each of the following statements:
(a) Passing an
(b) The iron in discarded automobiles slowly forms reddish brown, crumbly rust.
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5 Water is evaporated from the magnesium
chloride solution. The resulting solid is melted
at 700°C and decomposed by passing electric
current through it.
(a) What is the name of the physical change
that occurs first in the magnesium chloride?
(b) Write the balanced chemical equation for
this step.
(c) Identify the type of chemical reaction.
Classify each change as physical or chemical.
(a) the rusting of iron(b) the evaporation of fingernail-polish remover (acetone) from the skin(c) the burning of coal(d) the fading of a carpet upon repeated exposure to sunlight
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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- Particles in the illustration below undergo a chemical change. Which among the remaining boxes, a through d, can represent the products of the chemical change? If a box cannot represent the products of the chemical change, explain why. a b c darrow_forwardhat do the coefficients of a balanced chemical equation tell us about the proportions in which atoms and molecules react on an individual (microscopic) basis?arrow_forwardHow do you distinguish (a) chemical properties from physical properties? (b) distillation from filtration? (c) a solute from a solution?arrow_forward
- In the equation Ni+Cu(NO3)2Ni(NO3)2+Cu, which of the reactants is/are elements, and which of the products is/are compounds?arrow_forwardSuppose someone emptied ball bearings into a container of salt. Could you separate the ball bearings from the salt? How? Would your method involve no change, be a physical change, or be a chemical change?arrow_forwardClassify each change as physical or chemical. (a) A balloon filled with hydrogen gas explodes upon contactwith a spark.(b) The liquid propane in a barbecue evaporates away becausesomeone left the valve open.(c) The liquid propane in a barbecue ignites upon contactwith a spark.(d) Copper metal turns green on exposure to air andwater.arrow_forward
- Classify each property as physical or chemical. (a) the tendency of silver to tarnish(b) the shine of chrome(c) the color of gold(d) the flammability of propane gasarrow_forwardDefine physical change and chemical change. State which type of change occurs in each of the following statements: (a) Passing an electric current through molten magnesium chloride yields molten magnesium and gaseous chlorine. (b) The iron in discarded automobiles slowly forms reddish brown, crumbly rust.arrow_forwardClassify each change as physical or chemical. (a) the explosion of gunpowder in the barrel of a gun(b) the melting of gold in a furnace(c) the bubbling that occurs when you mix baking soda andvinegar(d) the bubbling that occurs when water boilsarrow_forward
- Classify each of the following as a physical change or a chemical change. (a) Touching a lit candle to hydrogen soap bubbles gives an explosion. (b)Heating water in a flask produces moisture on the glass. (c) Combining two colorless solutions gives a yellow solid. (d) Pouring vinegar on baking soda produces gas bubbles.arrow_forwardYou heat 2.53 grams of metallic mercury in air, which produces 2.73 grams of red-orange residue. Assume that the chemical change is the reaction of the metal with oxygen in the air. What is the mass of oxygen that react? When you strongly heat the red- orange residue, it decomposes to give her back the mercury and release the oxygen, which you collect. What is the mass of oxygen you collected?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
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