A sample of iron bar has a density of 7.87g/in^3. If the bar measures out to be 17.1mm x 6.6mm x 5.3mm, what is the mass of the iron bar in kg?

The density of gold is 19.3 g/cm^3.  What is the density of gold in lb/in^3? (1lb = 454 g , 1 in = 2.54 cm)

The density of silver is 10.5g/cm^3. What is the mass of a bar of silver in Kilograms, that measures 5.50cm x 3.73cm x 2.10cm?

Neutron stars form when large stars collapse. They are very dense, having an average density of 4.8x1017 . If we were able to take a piece of a neutron star, what volume in cubic millimeters (mm3) weighs 113,400 kg? Your answer must have the correct number of sig figs.

In 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 8×103 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 2.0×1030kg and the radius of the moon is 2.16×103mi. (Volume of a sphere =43πr3.)

A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. (84. cm )· 0= ? m² 3 3

In 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)

the mass of fuel in an airplane must be determined before takeoff. A jet contains 11505L of fuel after it has been filled with fuel. What is the mass of the fuel in kilograms if the fuels density is 0.765 g/cm^3?

A chemistry student needs 35.0 mL of dimethyl sulfoxide for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of dimethyl sulfoxide is 1.10 g·cm -3 Calculate the mass of dimethyl sulfoxide the student should weigh out. Be sure your answer has the correct number of significant digits. ?