1. Intro to General Chemistry

Density of Geometric Objects

1. Intro to General Chemistry

# Density of Geometric Objects - Video Tutorials & Practice Problems

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The **density of geometric objects** generally includes spheres, cubes and cylinders.

Calculating Density

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concept

## Density of Geometric Objects Concept

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example

## Density of Geometric Objects Example

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Problem

ProblemA copper wire (density = 8.96 g/cm^{3}) has a diameter of 0.32 mm. If a sample of this copper wire has a mass of 21.7 g, how long is the wire?

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Problem

ProblemIf the density of a certain spherical atomic nucleus is 1.0 x 10^{14} g/cm^{3} and its mass is 3.5 x 10^{-23} g, what is the radius in angstroms? (Å= 10^{−10} m)

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PRACTICE PROBLEMS AND ACTIVITIES (31)

- Calculate the volume in liters of a rectangular object with dimensions 13.0 cm * 11.0 cm * 12.0 cm. (a) 1720...
- (a) Three spheres of equal size are composed of aluminum 1density = 2.70 g/cm32, s i lver 1density = 10.49 g/c...
- (d) A cubic piece of metal measures 5.00 cm on each edge. If the metal is nickel, whose density is 8.90 g>...
- (c) A spherical ball of lead has a diameter of 5.0 cm. What is the mass of the sphere if lead has a density of...
- How many 1-cm squares would it take to construct a square that is 1 m on each side?
- A copper refinery produces a copper ingot weighing 70 kg. If the copper is drawn into wire whose diameter is 7...
- The density of silver is 10.5 g/cm3. What is the mass (in kilo-grams) of a cube of silver that measures 0.62 m...
- What is the density of lead in g/cm3 if a rectangular bar mea-suring 0.50 cm in height, 1.55 cm in width, and ...
- 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...
- (b) Using the mass of the proton from Table 2.1 and assuming its diameter is 1.0 * 10-15 m, calculate the dens...
- Very small semiconductor crystals, composed of approximately 1000 to 10,000 atoms, are called quantum dots. ...
- Very small semiconductor crystals, composed of approximately 1000 to 10,000 atoms, are called quantum dots. Qu...
- 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 ...
- Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a neutron is appr...
- Carbon-12 contains six protons and six neutrons. The radius of the nucleus is approximately 2.7 fm (femtometer...
- Carbon-12 contains six protons and six neutrons. The radius of the nucleus is approximately 2.7 fm (femtometer...
- (c) Using the volume of a silver atom and the formula for the volume of a sphere, calculate the radius in an...
- Lignum vitae is a hard, durable, and extremely dense wood used to make ship bearings. A sphere of this wood wi...
- Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 300 mg HCN per kilogram of air wh...
- A thief uses a can of sand to replace a solid gold cylinder that sits on a weight-sensitive, alarmed pedestal....
- Imagine that you place a cork measuring 1.30 cm * 5.50 cm * 3.00 cm in water and that on top of the cork you p...
- What is the edge length (in cm) of a titanium cube that contains 2.55 * 1024 titanium atoms? The density of ti...
- The proton has a radius of approximately 1.0 * 10 - 13 cm and a mass of 1.7 * 10 - 24 g. Determine the density...
- Brass is a copper–zinc alloy. What is the mass in grams of a brass cylinder having a length of 1.62 in. and a ...
- A steel cylinder has a length of 2.16 in, a radius of 0.22 in, and a mass of 41 g. What is the density of the ...
- A solid aluminum sphere has a mass of 85 g. Use the density of aluminum to find the radius of the sphere in in...
- The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0 * 10 - 13 cm. ...
- Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore ...
- Rolls of aluminum foil are 304 mm wide and 0.016 mm thick. What maximum length of aluminum foil can be made fr...
- Mercury is often used in thermometers. The mercury sits in a bulb on the bottom of the thermometer and rises u...
- An 8.894 g block of aluminum was pressed into a thin square of foil with 36.5 cm edge lengths. (a) If the de...