Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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The density of air at ordinary atmospheric pressure and 25 ∘C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 13.5 × 17.5 × 6.0 ft?
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- A jet airplane reaches 682. km/h on a certain flight. How long does it take to cover 342. m? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols. time x10 μ □·□ 믐arrow_forwardAt constant pressure, density of gas is inversely proportional to its temperature. This is how hot air balloon is floating in air: burning fuel makes inside air temperature higher and density lower; low density air balloon float on high density regular air. What is the density of air in g/L at 66 degree C if the atmospheric pressure is 1.0 atm? The average molar mass of air is about 29 g/mol. Keep two decimal places for your answer.arrow_forwardConvert 3.65 x 1043 micro seconds into kiloyears.arrow_forward
- if a plot of weight in g vs volume in ml for a metal gave the equation y=13.41x and R^2= 0.9981 what is density of the metal?arrow_forwardIn the year 2013, an estimated amount of 36 billion metrictons (1 metric ton = 1000 kg) of carbon dioxide 1CO22 wasemitted worldwide due to fossil fuel combustion and cementproduction. Express this mass of CO2 in grams without exponentialnotation, using an appropriate metric prefixarrow_forwardExpress the following numbers as decimals:(a) 1.52 × 10−2 , (b) 7.78 × 10−8 , (c) 1 × 10−6, (d) 1.6001 × 103.arrow_forward
- The density of benzene at 15oC is 0.8787g/mL. Calculate the mass of 0.1500 L of benzene at this temperaturearrow_forwardAt 25.0 ºC the density of dichloromethane is 1.325 x 103 kg / m3. If 10.0g of dichloromethane at 25.0ºC can completely fill a container, what is the maximum mass of water, in grams, that can be added to the same container at 25.0°C?arrow_forwardPheromones are compounds secreted by females of many insect species to attract mates. Typically, 1.00 × 10−8 g of a pheromone is sufficient to reach all targeted males within a radius of 0.500 mi. Calculate the density of the pheromone (in grams per liter) in a cylindrical air space having a radius of 0.500 mi and a height of 46.0 ft (volume of a cylinder of radius r and height h is πr2h). Enter your answer in scientific notation.arrow_forward
- If a sample of unknown substance has a mass of 3.50 kg and a volume of 1.30 L, what is the density of the substance when expressed in conventional (but non-SI) units of g/cm3?arrow_forwardIn 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass of our sun, but occupying less space than our moon. Suppose that one of these black holes has a mass of 1×10^3 suns and a radius equal to one-half the radius of our moon. What is its density in grams per cubic centimeter? The mass of the sun is 2.0×10^30 kg and the radius of the moon is 2.16×10^3 mi (Volume of a sphere =4/3πr^3)arrow_forwardVolume: 200 mL Diameter = 5.45 cm Height = 9.72 cm Using the equation V= ??2ℎ, calculate the actual volume of the beaker.arrow_forward
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