Problem 1CO Problem 2CO Problem 3CO: Draw pictures to illustrate simple chemical phenomena (like the differences among solids, liquids,... Problem 4CO: Explain the difference between inductive and deductive reasoning in your own words. Problem 5CO: Use appropriate techniques to convert measurements from one unit to another. Problem 6CO: Express the results of calculations using the correct number of significant figures. Problem 1.1PAE: Use the web to determine the mass of a steel beverage can from the 1970s and the mass of a modern... Problem 1.2PAE Problem 1.3PAE: Where does the scientific method start? What is the first step? Problem 1.4PAE: Use the web to determine the amount of aluminum used in the United States in a single year. What is... Problem 1.5PAE: Use the web to find current prices offered for aluminum for recycling. Is there variation in the... Problem 1.6PAE: Use the web to determine the differences in the amounts of aluminum recycled in states where there... Problem 1.7PAE: When we make observations in the laboratory, which perspective of chemistry are we normally using? Problem 1.8PAE: Which of the following items are matter and which are not? (a) a flashlight, (b) sunlight, (c) an... Problem 1.9PAE: Which macroscopic characteristics differentiate solids, liquids, and gases? (List as many as... Problem 1.10PAE: How can a liquid be distinguished from a fine powder? What type of experiment or observation might... Problem 1.11PAE: Some farmers use ammonia, NHS, as a fertilizer. This ammonia is stored in liquid form. Use the... Problem 1.12PAE: 1.10 Do the terms element and atom mean the same thing? If not, how do they differ? Problem 1.13PAE: 1.11 Label each of the following as either a physical process or a chemical process. (a) rusting of... Problem 1.14PAE: 1.12 Why do physical properties play a role in chemistry if they do not involve any chemical change? Problem 1.15PAE: 1.13 Physical properties may change because of a chemical change. For example, the color of an egg... Problem 1.16PAE: 1.14 Which part of the following descriptions of a compound or element refers to its physical... Problem 1.17PAE: Use a molecular level description to explain why gases are less dense than liquids or solids. Problem 1.18PAE: All molecules attract each other to some extent, and the attraction decreases as the distance... Problem 1.19PAE: 1.15 We used the example of attendance at a football game to emphasize the nature of observations.... Problem 1.20PAE: 1.16 Complete the following statement: Data that have a small random error but otherwise fall in a... Problem 1.21PAE: 1.17 Complete the following statement: Data that have a large systematic error can still he (a)... Problem 1.22PAE: 1.18 Two golfers are practicing shots around a putting green. Each golfer takes 20 shots. Golfer 1... Problem 1.23PAE Problem 1.24PAE: 1.20 Suppose that you are waiting at a corner for a bus. Three different routes pass this particular... Problem 1.25PAE: 1.21 When a scientist looks at an experiment and then predicts the results of other related... Problem 1.26PAE: 1.22 What is the difference between a hypothesis and a question? Problem 1.27PAE: 1.23 Should the words theory and model be used interchangeably in the context of science? Defend... Problem 1.28PAE: 1.24 What is a law of nature? Are all scientific laws examples of laws of nature? Problem 1.29PAE: 1.25 Describe a miscommunication that can arise because units are not included as part of the... Problem 1.30PAE: 1.26 What is the difference between a qualitative and a quantitative measurement? Problem 1.31PAE: 1.27 Identify which of the following units are base units in the SI system: grams, meters, joules,... Problem 1.32PAE: 1.28 What is a “derived” unit? Problem 1.33PAE: 1.29 Rank the following prefixes in order of increasing size of the number they represents : centi-,... Problem 1.34PAE: 1.30 The largest computers now include disk storage space measured in petabytes. How many bytes are... Problem 1.35PAE Problem 1.36PAE: 1.32 Use the web to determine how the Btu was initially established. For the engineering... Problem 1.37PAE: 1.33 How many micrograms are equal to one gram? Problem 1.38PAE: 1.34 Convert the value 0.120 ppb into ppm. Problem 1.39PAE: 1.35 How was the Fahrenheit temperature scale calibrated? Describe how this calibration process... Problem 1.40PAE: Superconductors are materials that have no resistance to the flow of electricity, and they hold... Problem 1.41PAE: 1.37 Express each of the following temperatures in Kelvins. (a) -10.°C, (b) 0.00 °C, (c) 280 °C, (d)... Problem 1.42PAE: 1.38 Express (a) 275 oC in K, (b) 25.55 K in oC, (c) -47.0 oC in oF, and (d) 100 oF in K. Problem 1.43PAE: 1.39 Express each of the following numbers in scientific notation. (a) 62.13, (b) 0.000414, (c)... Problem 1.44PAE: 1.40 How many significant figures are there in each of the following? (a) 0.136 m, (b) 0.0001050 g,... Problem 1.45PAE: 1.41 How many significant figures are present in these measured quantities? (a) 1374 kg, (b) 0.00348... Problem 1.46PAE: Perform these calculations and express the result with the proper number of significant figures. (a)... Problem 1.47PAE: 1.43 Calculate the following to the correct number of significant figures. Assume that all these... Problem 1.48PAE: 1.44 In an attempt to determine the velocity of a person on a bicycle, an observer uses a stopwatch... Problem 1.49PAE: 1.45 A student finds that the mass of an object is 4.131 g and its volume is 7.1 mL. What density... Problem 1.50PAE: 1.46 Measurements indicate that 23.6% of the residents of a city with a population of 531,314 are... Problem 1.51PAE: 1.47 A student weighs 10 quarters and finds that their total mass is 56.63 grams. What should she... Problem 1.52PAE: 1.48 A rock is placed on a balance and its mass is determined as 12.1 g. When the rock is then... Problem 1.53PAE: 1.49 A package of eight apples has a mass of 1.00 kg. What is the average mass of one apple in... Problem 1.54PAE Problem 1.55PAE: 1.51 A person measures 173 cm in height. What is this height in meters? Feet and inches? Problem 1.56PAE: 1.52 The distance between two atoms in a molecule is 148 pm. What is this distance in meters? Problem 1.57PAE: 1.53 Carry out the following unit conversions. (a) 3.47106g to g , (b) 2.73104L to mL, (c) 725 ns to... Problem 1.58PAE: 1.54 Carry out each of the following conversions. (a) 25.2 m to km, (b) 36.3 km to m, (c) 487 kg to... Problem 1.59PAE: 1.55 Convert 22.3 mL to (a) liters, (b) cubic inches, and (c) quarts. Problem 1.60PAE: 1.56 If a vehicle is travelling 92 m/s, what is its velocity in miles per hour? (0.62 miles=1.00 km) Problem 1.61PAE: 1.57 A load of asphalt weights 245 lb. and occupies a volume of 55.0 L. What is the density of this... Problem 1.62PAE: 1.58 One square mile contains exactly 640 acres. How many square meters are in one acre? Problem 1.63PAE: 1.59 A sample of crude oil has a density of 0.87 g/mL. What volume in liters does a 3.6-kg sample of... Problem 1.64PAE: 1.60 Mercury has a density of 13.6 g/mL. What is the mass of 4.72 L of mercury? Problem 1.65PAE: 1.61 The area of the 48 contiguous states is 3.02106mi2 . Assume that these states are completely... Problem 1.66PAE: 1.62 The dimensions of aluminium foil in a box for sale in supermarkets are 66 yards by 12 inches.... Problem 1.67PAE Problem 1.68PAE: 1.64 Wire is often sold in pound spools according to the wire gauge number. That number refers to... Problem 1.69PAE: 1.65 An industrial engineer is designing a process to manufacture bullets. The mass of each bullet... Problem 1.70PAE: 1.66 An engineer is working with archaeologists to create a realistic Roman village in a museum. The... Problem 1.71PAE: Draw a molecular scale picture to show how a crystal differs from a liquid. Problem 1.72PAE Problem 1.73PAE: 1.67 On average, Earth’s crust contains about 8.1 % aluminium by mass. If a standard I 2-ounce soft... Problem 1.74PAE Problem 1.75PAE: 1.69 The “Western Stone” in Jerusalem is one of the largest stone building blocks ever to have been... Problem 1.76PAE: A load of bauxite has a density of 3.15 g/cm3. If the mass of the load is 115 metric tons, how many... Problem 1.77PAE Problem 1.78PAE Problem 1.79PAE Problem 1.80PAE Problem 1.81PAE Problem 1.82PAE: Use the web to research the elastic modulus and yield strength of carbon fiber composites. How do... Problem 1.83PAE Problem 1.84PAE: 1.84 A student was given two metal cubes that looked similar. One was 1.05 cm on an edge and had a... Problem 1.85PAE: 1.85 Battery acid has a density of 1.285 g/mL and contains 38.0% sulfuric acid by mass. Describe how... Problem 1.86PAE: 1.86 Unfermented grape juice used to make wine is called a ‘must.” The sugar content of the must... Problem 1.87PAE: 1.87 A solution of ethanol in water has a volume of 54.2 mL and a mass of 49.6 g. what information... Problem 1.88PAE: 1.88 Legend has it that Archimedes, a famous scientist of Ancient Greece, was once commanded by the... Problem 1.89PAE: 1.89 Imagine that you place a cork measuring 1.30cm4.50cm3.00cm in a pan of water. On top of this... Problem 1.90PAE: 1.90 A calibrated flask was filled to the 25.00-mL mark with ethyl alcohol and was found to have a... format_list_bulleted
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