WGU Chemistry D425 Verified Multiple
Choice and Conceptual Actual Emended
Exam Questions With Reviewed 100%
Correct Detailed Answers
Guaranteed Pass!!Current Update
1. Convert 0.0494 ft3 to L. (2.54 cm = 1 in. and 1 L = 1 dm3 ) - ANSWER
1.40 L
2. A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the density
of glycerol in ounces/quart? (1.00 ounce = 28.4 grams, and 1.00 liter = 1.06
quarts) - ANSWER 41.9 oz/qt
3. Manganese makes up 1.3 x 10-4 percent by mass of the elements found in a
normal healthy body. How many grams of manganese would be found in
the body of a person weighing 206 lb? (2.205 lb = 1 kg) - ANSWER 0.12
g
4. The melting point of a certain element is 391°C. What is this on the
Fahrenheit scale? - ANSWER 736°F
5. A student performs an experiment to determine the density of a sugar
solution. She obtains the following results: 1.79 g/mL, 1.81 g/mL, 1.80
g/mL, 1.81 g/mL. If the actual value for the density of the sugar solution is
1.80 g/mL, which statement below best describes her results? - ANSWER
Her results are both precise and accurate
,6. If an object has a density of 8.65 g/cm3, what is its density in units of
kg/m3? - ANSWER 8.65 × 103 kg/m3
7. Which of the following metric relationships is incorrect? - ANSWER 1
gram = 103 kilograms
8. Consider the numbers 23.68 and 4.12. The sum of these numbers
has_______ significant figures, and the product of these numbers
has_______ significant figures. - ANSWER 4 and 3
9. In 1928, 29.3 g of a new element was isolated from 660 kg of the ore
molybdenite. The percent by mass of this element in the ore was: -
ANSWER 0.0044%
10.Which of the following are examples of extensive properties? - ANSWER
volume
11.The recommended adult dose of Elixophyllin, a drug used to treat asthma, is
6.00 mg/kg of body mass. Calculate the dose in milligrams for a 112 lb
person. (1 lb = 453.59 g) - ANSWER 305 mg
12.Which of the following setups would convert centimeters to feet? -
ANSWER cm × 1 i n/2.54 cm × 1 f t/12 i n
,13.What is the correct answer for the calculation of a volume (in mL) with
measured numbers 28.58 ( 16 × 8.02 )? - ANSWER 0.22 mL
14.A dose of aspirin of 5.0 mg per kilogram of body weight has been
prescribed to reduce the fever of an infant weighing 8.5 pounds. The
number of milligrams of aspirin that should be administered is ________. -
ANSWER 19mg
15.Consider the following three archery targets:
Which of the following figure(s) represent a result having high precision? -
ANSWER Figure II and Figure III
16.Consider the following three archery targets:
Which of the following statements concerning these figures is correct? -
ANSWER Figure I represents random error and Figure II represents
systematic error.
17.The mass of fuel in a jet must be calculated before each flight to ensure that
the jet is not too heavy to fly. A 747 is fueled with 173,231 L of jet fuel. If
the density of the fuel is 0.768 g/cm3, what is the mass of the fuel in
kilograms? - ANSWER 133000 kg
18.A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the mass of
a 57 mL sample of glycerol? - ANSWER 72 g
, 19.If the walls in a room are 955 square feet in area, and a gallon of paint
covers 15 square yards, how many gallons of paint are needed for the
room? (3 ft = 1 yd) - ANSWER 7.1 gallons
20.An alloy of iron contains 75.0% iron and 25.0% other elements. How many
grams of iron are present in 150.g of the alloy? - ANSWER 113 g
21.The correct answer (reported to the proper number of significant figures) to
the following is
( 1712 - 1615) × ( 8.66 × 7.66) = - ANSWER 6400
22.Convert 781K into Celsius - ANSWER 508°C
23.Which of the following volumes is equal to 30 mL? - ANSWER 30 cm3
24.A propane molecule contains 3 atoms of carbon. The number 3 represents
how many significant figures? - ANSWER infinite
25.Identify the exact number.
2
2.0000
2.0
2.000
2.00 - ANSWER 1. 2
Choice and Conceptual Actual Emended
Exam Questions With Reviewed 100%
Correct Detailed Answers
Guaranteed Pass!!Current Update
1. Convert 0.0494 ft3 to L. (2.54 cm = 1 in. and 1 L = 1 dm3 ) - ANSWER
1.40 L
2. A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the density
of glycerol in ounces/quart? (1.00 ounce = 28.4 grams, and 1.00 liter = 1.06
quarts) - ANSWER 41.9 oz/qt
3. Manganese makes up 1.3 x 10-4 percent by mass of the elements found in a
normal healthy body. How many grams of manganese would be found in
the body of a person weighing 206 lb? (2.205 lb = 1 kg) - ANSWER 0.12
g
4. The melting point of a certain element is 391°C. What is this on the
Fahrenheit scale? - ANSWER 736°F
5. A student performs an experiment to determine the density of a sugar
solution. She obtains the following results: 1.79 g/mL, 1.81 g/mL, 1.80
g/mL, 1.81 g/mL. If the actual value for the density of the sugar solution is
1.80 g/mL, which statement below best describes her results? - ANSWER
Her results are both precise and accurate
,6. If an object has a density of 8.65 g/cm3, what is its density in units of
kg/m3? - ANSWER 8.65 × 103 kg/m3
7. Which of the following metric relationships is incorrect? - ANSWER 1
gram = 103 kilograms
8. Consider the numbers 23.68 and 4.12. The sum of these numbers
has_______ significant figures, and the product of these numbers
has_______ significant figures. - ANSWER 4 and 3
9. In 1928, 29.3 g of a new element was isolated from 660 kg of the ore
molybdenite. The percent by mass of this element in the ore was: -
ANSWER 0.0044%
10.Which of the following are examples of extensive properties? - ANSWER
volume
11.The recommended adult dose of Elixophyllin, a drug used to treat asthma, is
6.00 mg/kg of body mass. Calculate the dose in milligrams for a 112 lb
person. (1 lb = 453.59 g) - ANSWER 305 mg
12.Which of the following setups would convert centimeters to feet? -
ANSWER cm × 1 i n/2.54 cm × 1 f t/12 i n
,13.What is the correct answer for the calculation of a volume (in mL) with
measured numbers 28.58 ( 16 × 8.02 )? - ANSWER 0.22 mL
14.A dose of aspirin of 5.0 mg per kilogram of body weight has been
prescribed to reduce the fever of an infant weighing 8.5 pounds. The
number of milligrams of aspirin that should be administered is ________. -
ANSWER 19mg
15.Consider the following three archery targets:
Which of the following figure(s) represent a result having high precision? -
ANSWER Figure II and Figure III
16.Consider the following three archery targets:
Which of the following statements concerning these figures is correct? -
ANSWER Figure I represents random error and Figure II represents
systematic error.
17.The mass of fuel in a jet must be calculated before each flight to ensure that
the jet is not too heavy to fly. A 747 is fueled with 173,231 L of jet fuel. If
the density of the fuel is 0.768 g/cm3, what is the mass of the fuel in
kilograms? - ANSWER 133000 kg
18.A 20.0 mL sample of glycerol has a mass of 25.2 grams. What is the mass of
a 57 mL sample of glycerol? - ANSWER 72 g
, 19.If the walls in a room are 955 square feet in area, and a gallon of paint
covers 15 square yards, how many gallons of paint are needed for the
room? (3 ft = 1 yd) - ANSWER 7.1 gallons
20.An alloy of iron contains 75.0% iron and 25.0% other elements. How many
grams of iron are present in 150.g of the alloy? - ANSWER 113 g
21.The correct answer (reported to the proper number of significant figures) to
the following is
( 1712 - 1615) × ( 8.66 × 7.66) = - ANSWER 6400
22.Convert 781K into Celsius - ANSWER 508°C
23.Which of the following volumes is equal to 30 mL? - ANSWER 30 cm3
24.A propane molecule contains 3 atoms of carbon. The number 3 represents
how many significant figures? - ANSWER infinite
25.Identify the exact number.
2
2.0000
2.0
2.000
2.00 - ANSWER 1. 2
