Chemistry Chemistry Practice Problems Solutions Library

Density Solutions Library

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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