Chemistry Chemistry Practice Problems Solutions Library

# Density Solutions Library

Access 221 Density video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Density learn videos.

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221 solutions

Density

#### Q. Based on the first and fourth sketches (Figure 4), what is the density of the block?Express your answer with the appropriate units.

Solved • May 1, 2020

Density

#### Q. Isopropyl alcohol has a density of 0.79 g/mL. How many mL of isopropyl alcohol does it take to get 35.0 grams?

Solved • Mar 18, 2020

Density

#### Q. Butane (C4H10 ) is the liquid fuel in lighters. How many grams of carbon are present within a lighter containing 7.25 mL of butane? (The density of...

Solved • Mar 17, 2020

Density

#### Q. Determine the volume of hexane that contains 5.33 x 10 22 molecules of hexane. The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/m...

Solved • Sep 30, 2019

Density

#### Q. Determine the mass of an object that has a volume of 88.6 mL and a density of 9.77 g/mL.A. 298 gB. 1100 gC. 907 gD. 568 gE. 866 g

Solved • Sep 15, 2019

Density

#### Q. The density of silver is 10.5 g/cm3. If a piece of silver occupies a volume of 63.1 cm3, what is the mass (g) of the piece of silver?A. 663B. 0.445...

Solved • Sep 13, 2019

Density

#### Q. Determine the mass of an object that has a volume of 88.6 mL and a density of 7.77 g/mL.A) 80.8 g B) 11.4 g C) 688 g D) 0.0877 g E) 96.4 g

Solved • Sep 12, 2019

Density

#### Q. If the density of a certain spherical atomic nucleus is 1.0 × 1014 g/cm3 and its mass is 2.0 × 10-23 g, what is its radius in cm?

Solved • Aug 29, 2019

Density

#### Q. What is the mass of 62.0 mL of ethanol? The density of ethanol at room temperature = 0.789 g/mL?

Solved • Aug 7, 2019

Density

#### Q. Calculate the density of the  2412 Mg nucleus in g/mL, assuming that it has the typical nuclear diameter of 1 × 10–13 cm and is spherical in shape.

Solved • Dec 10, 2018

Density

#### Q. Benzoic acid, C6H5COOH, melts at 122 oC. The density in the liquid state at 130 oC is 1.08 g/cm3. The density of solid benzoic acid at 15 oC is 1.2...

Solved • Nov 27, 2018

Density

#### Q. Benzoic acid, C6H5COOH, melts at 122 oC. The density in the liquid state at 130 oC is 1.08 g/cm3. The density of solid benzoic acid at 15 oC is 1.2...

Solved • Nov 27, 2018

Density

#### Q. Very small semiconductor crystals composed of approximately 1000 to 100,000 atoms, are called quantum dots. Quantum dots made of the semiconductor ...

Solved • Oct 31, 2018

Density

#### Q. Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 310 mg HCN per kilogram of air when inhaled.Calculate the amount of HCN...

Solved • Oct 31, 2018

Density

#### Q. The density of liquid NH3 is 0.64 g/mL; the density of gaseous NH3 at STP is 0.0007 g/mL. Explain the difference between the densities of these two...

Solved • Oct 30, 2018

Density

#### Q. Because zinc has nearly the same atomic radius as copper (d = 8.95 g/cm3 ), zinc atoms substitute for some copper atoms in the many types of brass....

Solved • Oct 30, 2018

Density

#### Q. A pure diamond has a density of 3.52 g/cm3. Set up a dimensional-analysis equation to find the volume (cm3) of the Hope Diamond that weighs 44.4 ca...

Solved • Oct 25, 2018

Density

#### Q. The density of silver is 10.5 g/cm3.What is the mass (in kilograms) of a cube of silver that measures 0.56 m on each side?

Solved • Oct 25, 2018

Density

#### Q. What is the density of lithium metal in g/cm3 if a cylindrical wire with a diameter of 2.40 mm and a length of 15.0 cm has a mass of 0.3624 g?

Solved • Oct 25, 2018

Density

#### Q. When an irregularly shaped chunk of silicon weighing 8.763 g was placed in a graduated cylinder containing 25.00 mL of water, the water level in th...

Solved • Oct 25, 2018

Density

#### Q. Lignum vitae is a hard, durable, and extremely dense wood used to make ship bearings. A sphere of this wood with a diameter of 7.61 cm has a mass o...

Solved • Oct 25, 2018

Density

#### Q. Lignum vitae is a hard, durable, and extremely dense wood used to make ship bearings. A sphere of this wood with a diameter of 7.61 cm has a mass o...

Solved • Oct 25, 2018

Density

#### Q. What is the density of glass in g/cm3 if a sample weighing 27.94 g has a volume of 11.81 cm3 ?

Solved • Oct 25, 2018

Density

#### Q. What is the density of lead (in g/cm3 ) if a rectangular bar measuring 0.50 cm in height, 1.55 cm in width, and 25.00 cm in length has a mass of 21...

Solved • Oct 25, 2018

Density

#### Q. Aspirin has a density of 1.40 g/cm3.What is the volume (in cubic centimeters) of an aspirin tablet weighing 2.6×102 mg ?

Solved • Oct 25, 2018

Density

#### Q. A calibrated flask was filled to the 25.00 mL mark with ethyl alcohol. By weighing the flask before and after adding the alcohol, it was determined...

Solved • Oct 25, 2018

Density

#### Q. Brass is a copper-zinc alloy.What is the mass in grams of a brass cylinder having a length of 2.02 in. and a diameter of 0.492 in. , if the composi...

Solved • Oct 25, 2018

Density

#### Q. The element gallium (Ga) has the second largest liquid range of any element, melting at 29.78 oC and boiling at 2204 oC at atmospheric pressure.Wha...

Solved • Oct 25, 2018

Density

#### Q. A bag of Hersheys Kisses contains the following information:Serving size: 9pieces= 41gramsCalories per serving: 230.Total fat per serving: 13 gThe ...

Solved • Oct 25, 2018

Density

#### Q. More sulfuric acid (density = 1.8302 g/cm3) is produced than any other chemical-approximately 3.6 x 1011 lb/yr worldwide.What is the volume of this...

Solved • Oct 25, 2018

Density

#### Q. Which block in the following drawing of a balance is more dense, red or green?

Solved • Oct 25, 2018

Density

#### Q. The following cylinder contains three liquids that do not mix with one another:water (density=1.0g/mL),vegetable oil (density=0.93g/mL),and mercury...

Solved • Oct 25, 2018

Density

#### Q. You would like to determine if a set of antique silverware is pure silver. The mass of a small fork was measured on a balance and found to be 85.01...

Solved • Oct 25, 2018

Density

#### Q. An experiment is performed to determine if pennies are made of pure copper. The mass of 11 pennies was measured on a balance and found to be 26.951...

Solved • Oct 25, 2018

Density

#### Q. An experiment is performed to determine if pennies are made of pure copper. The mass of 11 pennies was measured on a balance and found to be 26.951...

Solved • Oct 25, 2018

Density

#### Q. Chloroform, a substance once used as an anesthetic, has a density of 1.483 g/mL at 20 oC.How many milliliters would you use if you needed 8.03 g ?

Solved • Oct 25, 2018

Density

#### Q. You are beachcombing on summer vacation and find a silver bracelet. You take it to the jeweler and he tells you that it is silver plated and will g...

Solved • Oct 25, 2018

Density

#### Q. A U.S. 1-cent coin (a penny) has a diameter of 19 mm and a thickness of 1.5 mm. Assume the coin is made of pure copper, whose density and approxima...

Solved • Oct 25, 2018

Density

#### Q. The U.S. Mint produces a dollar coin called the American Silver Eagle that is made of nearly pure silver. This coin has a diameter of 41 mm and a t...

Solved • Oct 25, 2018

Density

#### Q. Platinum, Pt, is one of the rarest metals. Worldwide annual production is only about 130 tons.Platinum has a density of 21.4 g/cm3. If thieves were...

Solved • Oct 25, 2018

Density

#### Q. To identify a liquid substance, a student determined its density. Using a graduated cylinder, she measured out a 45-mL sample of the substance. She...

Solved • Oct 25, 2018

Density

#### Q. In 2009, a team from Northwestern University and Western Washington University reported the preparation of a new "spongy" material composed of nick...

Solved • Oct 25, 2018

Density

#### Q. A thief plans to steal a gold sphere with a radius of 28.5 cm from a museum. If the gold has a density of 19.3 g/cm3, what is the mass of the spher...

Solved • Oct 25, 2018

Density

#### Q. Automobile batteries contain sulfuric acid, which is commonly referred to as "battery acid".Calculate the number of grams of sulfuric acid in 1 gal...

Solved • Oct 25, 2018

Density

#### Q. A 40-lb container of peat moss measures 14 x 20 x 30 in. A 40-lb container of topsoil has a volume of 1.9 gal{ m gal}.Calculate the average density...

Solved • Oct 25, 2018

Density

#### Q. A 40-lb container of topsoil has a volume of 1.9 gal{ m gal}.Calculate the average density of topsoil in units of g/cm3.

Solved • Oct 25, 2018

Density

#### Q. Two spheres of equal volume are placed on the scales as shown.Which one is more dense?

Solved • Oct 25, 2018

Density

#### Q. Water has a density of 0.997 g/cm3 at 25 oC; ice has a density of 0.917 g/cm3 at  -10 oC.If a soft-drink bottle whose volume is 1.60 L is completel...

Solved • Oct 25, 2018

Density

#### Q. A 10.0 cm long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 11.88 ...

Solved • Oct 25, 2018

Density

#### Q. Gold is alloyed (mixed) with other metals to increase its hardness in making jewelry.Consider a piece of gold jewelry that weighs 9.60 g and has a ...

Solved • Oct 25, 2018

Density

#### Q. You are assigned the task of separating a desired granular material, with a density of 3.62 g/cm3, from an undesired granular material that has a d...

Solved • Oct 25, 2018

Density

#### Q. The density of air at ordinary atmospheric pressure and 25 oC is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 13.5 ...

Solved • Oct 25, 2018

Density

#### Q. If the mass of the bar is 104.7 g, how many significant figures should be reported when its density is calculated using the calculated volume?

Solved • Oct 25, 2018

Density

#### Q. A sample of tetrachloroethylene, a liquid used in dry cleaning that is being phased out because of its potential to cause cancer, has a mass of 40....

Solved • Oct 25, 2018

Density

#### Q. Will tetrachloroethylene float on water? (Materials that are less dense than water will float.)

Solved • Oct 25, 2018

Density

#### Q. Carbon dioxide (CO2) is a gas at room temperature and pressure. However, carbon dioxide can be put under pressure to become a "supercritical fluid"...

Solved • Oct 25, 2018

Density

#### Q. Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm (femtometers) and the radius of the atom is approxim...

Solved • Oct 25, 2018

Density

#### Q. A flask containing 7.50 mL of a liquid weighs 168.1 g with the liquid in the flask and 160.1 g when empty.Calculate the density of the liquid in g/...

Solved • Oct 25, 2018

Density

#### Q. A flask containing 15.0 mL of a liquid weighs 128.1 g with the liquid in the flask and 120.1 g when empty.Calculate the density of the liquid in g/...

Solved • Oct 25, 2018

Density

#### Q. A metal cube has an edge length of 11.4 mm and a mass of 6.67 g .Density of Common Substancesat 20 oCSubstanceDensity(g/cm3)Charcoal (from oak)0.57...

Solved • Oct 25, 2018

Density

#### Q. Backpackers often use canisters of white gas to fuel a cooking stove’s burner. If one canister contains 1.75 L of white gas, and the density of the...

Solved • Oct 25, 2018

Density

#### Q. Approximate the percent increase in waist size that occurs when a 150-lb person gains 35.0 lb of fat. Assume that the volume of the person can be m...

Solved • Oct 25, 2018

Density

#### Q. Ethylene glycol (antifreeze) has a density of 1.11 g/cm3.What is the mass in g of 426 mL of ethylene glycol?

Solved • Oct 25, 2018

Density

#### Q. Section 1.7 showed that in 1997 Los Angeles County air had carbon monoxide (CO) levels of 15.0 ppm. An average human inhales about 0.50 L of air pe...

Solved • Oct 25, 2018

Density

#### Q. Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. One potential application of...

Solved • Oct 25, 2018

Density

#### Q. Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. One potential application of...

Solved • Oct 25, 2018

Density

#### Q. A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water t...

Solved • Oct 25, 2018

Density

#### Q. Liquid nitrogen has a density of 0.808 g/mL and boils at 77 K. Researchers often purchase liquid nitrogen in insulated 177 L tanks. The liquid vapo...

Solved • Oct 25, 2018

Density

#### Q. Mercury is often used as an expansion medium in a thermometer. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capi...

Solved • Oct 25, 2018

Density

#### Q. A solid aluminum sphere has a mass of 86 g .Use the density of aluminum to find the radius of the sphere in inches.

Solved • Oct 25, 2018

Density

#### Q. A small airplane takes on 281 L of fuel.If the density of the fuel is 0.821 g/mL, what mass of fuel has the airplane taken on?

Solved • Oct 25, 2018

Density

#### Q. The radius of a neon atom is 69 pm, and its mass is 3.35 x 10-23 g. What is the density of the atom in grams per cubiccentimeter (g/cm3)? Assume th...

Solved • Oct 17, 2018

Density

#### Q. An experiment was performed in which an empty 100-mL graduated cylinder was weighed. It was weighed once againafter it had been filled to the 10.0-...

Solved • Oct 17, 2018

Density

#### Q. Sterling silver is a solid solution of silver and copper. If a piece of a sterling silver necklace has a mass of 105.0 g and avolume of 10.12 mL, c...

Solved • Oct 17, 2018

Density

#### Q. The density of an irregularly shaped object was determined as follows. The mass of the object was found to be 28.90 g + 0.03 g. A graduated cylinde...

Solved • Oct 17, 2018

Density

#### Q. In the opening scenes of the movie Raiders of the Lost Ark, Indiana Jones tries to remove a gold idol from a booby-trapped pedestal. He replaces th...

Solved • Oct 17, 2018

Density

#### Q. In the opening scenes of the movie  Raiders of the Lost Ark, Indiana Jones tries to remove a gold idol from a booby-trapped pedestal. He replaces t...

Solved • Oct 17, 2018

Density

#### Q. In each of the following pairs, which has the greater volume?b. 100 g of gold or 100 g of water

Solved • Oct 17, 2018

Density

#### Q. In each of the following pairs, which has the greater mass? (See Table R‑5.)d. 75 mL of copper or 1.0 L of benzene

Solved • Oct 17, 2018

Density

#### Q. In each of the following pairs, which has the greater mass? (See Table R‑5.)c. 19.3 mL of water or 1.00 mL of gold

Solved • Oct 17, 2018

Density

#### Q. For a material to float on the surface of water, the material must have a density less than that of water (1.0 g/mL) andmust not react with the wat...

Solved • Oct 17, 2018

Density

#### Q. Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes leading to irreversible i...

Solved • Oct 17, 2018

Density

#### Q. A large piece of jewelry has a mass of 132.6 g. A graduated cylinder initially contains 48.6 mL water. When the jewelry is submerged in the graduat...

Solved • Oct 16, 2018

Density

#### Q. Calculate these volumes.(a) What is the volume of 25 g iodine, density = 4.93 g/cm3 ?

Solved • Oct 16, 2018

Density

#### Q. Calculate these masses.(b) What is the mass of 25.0 mL octane, density = 0.702 g/cm3 ?

Solved • Oct 16, 2018

Density

#### Q. Osmium is one of the densest elements known. What is its density if 2.72 g has a volume of 0.121 cm3 ?

Solved • Oct 16, 2018

Density

#### Q. Calculate the density of aluminum if 27.6 cm3 has a mass of 74.6 g.

Solved • Oct 16, 2018

Density

#### Q. Liquid nitrogen is obtained from liquefied air and is used industrially to prepare frozen foods. It boils at 77.36 K. At the boiling point, the den...

Solved • Oct 12, 2018

Density

#### Q. An Olympic-size pool is 50.0 m long and 25.0 m wide.(a) How many gallons of water (d = 1.0 g/mL) are needed to fill the pool to an average depth of...

Solved • Oct 12, 2018

Density

#### Q. These organic solvents are used to clean compact discs:If a 15.00-mL sample of CD cleaner weighs 11.775 g at 20°C, which solvent does the sample mo...

Solved • Oct 12, 2018

Density

#### Q. An empty vial weighs 55.32 g. (a) If the vial weighs 185.56 g when filled with liquid mercury (d= 13.53g/cm3), what is its volume? (b) How much wou...

Solved • Oct 12, 2018

Density

#### Q. Copper can be drawn into thin wires. How many meters of 34-gauge wire (diameter = 6.304 x 10−3 in) can be produced from the copper in 5.01 lb of co...

Solved • Oct 10, 2018

Density

#### Q. A cylindrical tube 9.5 cm high and 0.85 cm in diameter is used to collect blood samples. How many cubic decimeters (dm3) of blood can it hold (V of...

Solved • Oct 10, 2018

Density

#### Q. A 25.0-g sample of each of three unknown metals is added to 25.0 mL of water in graduated cylinders A, B, and C, and the final volumes are depicted...

Solved • Oct 10, 2018

Density

#### Q. A steel ball-bearing with a circumference of 32.5 mm weighs 4.20 g. What is the density of the steel in g/cm3 (V of a sphere = 4/3 πr3 ; circumfere...

Solved • Oct 9, 2018

Density

#### Q. A small cube of aluminum measures 15.6 mm on a side and weighs 10.25 g. What is the density of aluminum in g/cm3?

Solved • Oct 9, 2018

Density

#### Q. The mineral galena is composed of lead(II) sulfide and has an average density of 7.46 g/cm3. (a) How many moles of lead(II) sulfide are in 8.32 ft3...

Solved • Oct 4, 2018

Density

#### Q. An empty beaker weighs 28.87 g. a) When completely filled with water, the beaker and its contents have a total mass of 37765 g. What volume does th...

Solved • Sep 27, 2018

Density

#### Q. An ore sample has a mass of 43.02 g. When the sample is added to water in a graduated cylinder, the water rises to 52.5 mL from 44.5 mL. What is th...

Solved • Sep 26, 2018

Density

#### Q. A granite sample has a density of 2.67 g/cm3. What is the mass of a granite block that measures 3.50 cm x 5.00 cm x 7.25 cm? (a) 345 g (b) 334 g (c...

Solved • Sep 26, 2018