Chemistry for Today
8th Edition
ISBN: 9781133606994
Author: Seager, Spencer L./
Publisher: Cengage Learning
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Wire often sold in pounds spools according to the wire gauge number. That number refers to the diameter of the wire. How many meters are in 10 pound spool of 12 gauge aluminum wire? A 12 gauge wire has a diameter of 0.0808 inches. Aluminum has a density of 2.70g/cm^3
Calculate and record the average density of a penny (in g/mL) that is made after 1982. 95 percent copper and 5 percent zinc made up the composition of pennies before 1982.
1) The weight of a rock is measured to be 0.075 lbs. After placing the rock in a graduated cylinder containing 17.09 mL of water, the new measurement is 28.76 mL. Calculate the density of the rock in g/mL.
2) A person measures the velocity of a biker riding in a straight line along a sidewalk using a stopwatch. The time it took for the biker to pass 29 squares on the sidewalk was 11.29 seconds. The area of the squares on the sidewalk was measured to be 2731 in2. Calculate the velocity of the biker in m/s.Note: 1 in = 2.54 cm
3) A hollow square metal tube has a measurement of 1.98 in for each side and a weight of 60.92 g. The volume of empty space inside the tube was measured to be 2.44 in3. If the density of the metal used in constructing the tube is 11.46 g/mL, calculate the length of the tube in inches.Note: 1 in = 2.54 cm, 1 cm3 = 1 mL
4) Porosity is a measure of the void or empty spaces in a material and is a fraction of the volume of voids over the total volume. The density of the…
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- A student experimentally determines the density of a metal cube. The edge length of the cube is measured using calipers. The cube's true density is 12.30 g/cm3. Use the student's collected data below and calculate the percent error for the measurement. Cube's Mass 45.961 g Edge Length 1.72 cmarrow_forward(a) How many picometers are there in 1 m? (b) Express6.0 * 103 m using a prefix to replace the power of ten.(c) Use exponential notation to express 4.22 mg in grams.(d) Use decimal notation to express 4.22 mg in grams.arrow_forwardWhat number is represented by each of these names? a. score b. decade c. bloit d. barn e. jiffyarrow_forward
- Calculating the density of each object with the correct amount of sig. figs. and predict if it will sink or float in water. A wooden object has a density of 12 g/mL and a volume of 7 mL. What is the mass of this object? A lab measures a piece of crumpled aluminum and finds its mass to be 14.3g and itʼs volume to be 5.26mL. Later on, they have a second piece of crumpled aluminum, which has a mass of 12.3g. Whatʼs the volume of the second piece?arrow_forwardThe density of mercury is 13.35 g/cm3. Experimental results gave the following data: 10 4.5 g/cm316.65 g/cm315.75 g/cm312.35 g/cm3Can the measurement be described as accurate or as precise? Explain your answer.arrow_forward(a) A bumblebee flies with a ground speed of 15.2 m/s. Calculateits speed in km/hr. (b) The lung capacity of the bluewhale is 5.0 * 103 L. Convert this volume into gallons.(c) The Statue of Liberty is 151 ft tall. Calculate its height inmeters. (d) Bamboo can grow up to 60.0 cm/day. Convertthis growth rate into inches per hour.arrow_forward
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