Chem 065 - Introductory General Chemistry » Winter 2024 » Practice Density

Need help with your exam preparation?

Question #1
Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in an ingot with the dimensions of 10.0 in × 4.00 in × 3.00 in. 1 in = 2.54 cm
A.   3.80 × 104
B.   0.161
C.   102
D.   56.2
E.   2.32 × 103
Question #2
What is the density (g/mL) of an object that has a mass of 14.01 grams and, when placed into a graduated cylinder, causes the water level to rise from 25.2 mL to 33.6 mL?
A.   1.3
B.   2.4
C.   1.8
D.   1.7
E.   0.6
Question #3
An object weighing 1.840 kg has a volume of 0.0015 m3. What is the density of the object in g/cm3?
A.   1.2
B.   0.82
C.   0.0028
D.   0.0012
E.   1.2×103
Question #4
A popular science demonstration is to take several liquids that will not mix together and "stack" these liquids in a tall glass cylinder. Suppose the following three liquids were placed in the same tall, narrow glass cylinder: SUBSTANCE ---- DENSITY g/mL vinegar ---- 1.01 motor oil ---- 0.87 corn syrup ---- 1.36 These liquids would stack in which order?
A.   corn syrup on top, vinegar in the middle, motor oil on the bottom
B.   vinegar on top, motor oil in the middle, corn syrup on the bottom
C.   motor oil on top, vinegar in the middle, corn syrup on the bottom
D.   motor oil on top, corn syrup in the middle, vinegar on the bottom
E.   corn syrup on top, motor oil in the middle, vinegar on the bottom
Question #5
The jet fuel in an airplane has a mass of 97.5 kg and a density of 0.804 g/cm3. What is the volume of this jet fuel?
A.   7.84 × 10-2 cm3
B.   1.21 × 105 cm3
C.   7.84 × 104 cm3
D.   1.21 × 102 cm3
E.   1.21 × 103 cm3
Question #6
Titanium has a density of 4.506 g/cm3. What is the volume in L of 36 kg of titanium? Write your final answer with two digits after the decimal point without any unit. For example, if your answer is 25.5245 L, just write 25.52.
A.   6.56
B.   8.11
C.   7.06
D.   7.99
Question #7
What is the price of 355 centigram of platinum, if platinum sells for $623.82 per ounce and has a density of 21.45 g/cm3? 1 L = 33.814 ounces and 1 cm3 = 1 mL. Write your final answer with two digits after the decimal point without any unit. For example, if your answer is $25.5245, just write 25.52.
A.   3.92
B.   3.11
C.   2.25
D.   3.49
Question #8
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 x 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 x1030 kg, and the radius of the moon is 2.16 x 103 mi. (Volume of a sphere = 4/3πr3).
A.   7×1015 g cm-3
B.   3 ×104 g cm-3
C.   9×1010 g cm-3
D.   5×107 g cm-3

Need help with your exam preparation?