Questions on density, unit conversions and scientific notation
Acetone has a density of 0.791 g/mL. If 1 gallon = 3.7854 liters, how many kg should the
contents of a 5.00 gallon container filled with acetone weigh?
a. 1.045 kg
b. 12.6 kg
c. 13.8 kg
d. 15.0 kg
e. 23.9 kg
A number resulting from a measurement was properly expressed in scientific notation as 2.1 x 10-3 meters (m). The number could also be correctly written as
a. 0.0021 m
b. 0.002100 m
c. 0.00021 m
d. 2.1000 m
e. 21000 m
Given this data from lab, for mass and then the volume of water displaced in a graduated
cylinder by introduction of a metal sample to the cylinder.
Mass of weighing cup = 0.452 g.
Mass of weighing cup + metal sample = 72.943 g.
Volume of water in cylinder = 15.2 cm3.
When the metal sample was carefully lowered into the graduated cylinder, the water above the submerged metal sample rose to the 19.0 cm3 mark. What is the density of the metal?
a. 2.2 g cm-3
b. 3.8 g cm-3
c. 4.8 g cm-3
d. 19 g cm-3
e. 19.2 g cm-3
Thank you so much!!
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