WGU Chemistry D425 Verified Multiple
Choice and Conceptual Actual Emended
Exam Questions With Reviewed 100%
Correct Detailed Answers
Guaranteed Pass!!Current Update
1) The temperature of liquid nitrogen is -196 °C. What is the corresponding reading on the
Kelvin scale?
A) -127 K
B) 48 K
C) 77 K
D) -91 K
E) 146 K - ANSWER C) 77 K
2) 650. J is the same amount of energy as
A) 155 cal.
B) 2720 cal.
C) 2.72 cal.
D) 1550 cal.
E) 650 cal. - ANSWER A) 155 cal.
3) The dietary calorie (Cal) is equal to
A) 10 calories.
B) 1000 kilocalories.
C) 100 calories.
D) 1 calorie.
,E) 1000 calories. - ANSWER E) 1000 calories.
4) A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat.
If the pizza contains 280 kcal, how many grams of fat are present? (The caloric values for foods
are 4.0 kcal/g for carbohydrate, 4.0 kcal/g for protein, and 9.0 kcal/g for fat.) Round off the
answer for each food type to the tens place.
A) 12 g
B) 10. g
C) 250 g
D) 55 g
E) 25 g - ANSWER A) 12 g
5) The specific heat of a substance is the amount of heat needed to A) change 1 g of the
substance from the solid to the liquid state.
B) convert 1 g of a solid to a gas.
C) convert 1 g of a liquid to gas.
D) change 1 g of the substance from the liquid to the solid-state.
E) raise the temperature of 1 g of the substance by 1 °C. - ANSWER E) raise the temperature
of 1 g of the substance by 1 °C.
6) How many calories are required to increase the temperature of 13 g of ethanol from 11 °C to
23 oC? The specific heat of alcohol is 0.588 cal/g °C.
A) 0.63 cal
B) 83 cal
C) 0.54 cal
D) 170 cal
E) 92 cal - ANSWER E) 92 cal
, 7) Written in scientific notation, 0.000 000 33 is
A) 3.3.
B) 3.3 × 107.
C) 3.3 × 108.
D) 3.3 × 10-8.
E) 3.3 × 10-7. - ANSWER E) 3.3 × 10-7.
8) Written in scientific notation, 540 000 is
A) 0.54 × 106.
B) 54 × 108.
C) 5.4.
D) 5.4 × 10-5.
E) 5.4 × 105. - ANSWER E) 5.4 × 105.
9) A person who exercises regularly has 16% body fat by mass. If this person weighs 155 lb,
what is the mass, in kilograms, of body fat?
A) 11 kg
B) 25 kg
C) 70 kg
D) 155 kg - ANSWER A) 11 kg
10) Carbon monoxide (CO) in automobile exhaust is a(n)
A) element
B) compound
C) homogeneous mixture
D) heterogeneous mixture - ANSWER B) compound
Choice and Conceptual Actual Emended
Exam Questions With Reviewed 100%
Correct Detailed Answers
Guaranteed Pass!!Current Update
1) The temperature of liquid nitrogen is -196 °C. What is the corresponding reading on the
Kelvin scale?
A) -127 K
B) 48 K
C) 77 K
D) -91 K
E) 146 K - ANSWER C) 77 K
2) 650. J is the same amount of energy as
A) 155 cal.
B) 2720 cal.
C) 2.72 cal.
D) 1550 cal.
E) 650 cal. - ANSWER A) 155 cal.
3) The dietary calorie (Cal) is equal to
A) 10 calories.
B) 1000 kilocalories.
C) 100 calories.
D) 1 calorie.
,E) 1000 calories. - ANSWER E) 1000 calories.
4) A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat.
If the pizza contains 280 kcal, how many grams of fat are present? (The caloric values for foods
are 4.0 kcal/g for carbohydrate, 4.0 kcal/g for protein, and 9.0 kcal/g for fat.) Round off the
answer for each food type to the tens place.
A) 12 g
B) 10. g
C) 250 g
D) 55 g
E) 25 g - ANSWER A) 12 g
5) The specific heat of a substance is the amount of heat needed to A) change 1 g of the
substance from the solid to the liquid state.
B) convert 1 g of a solid to a gas.
C) convert 1 g of a liquid to gas.
D) change 1 g of the substance from the liquid to the solid-state.
E) raise the temperature of 1 g of the substance by 1 °C. - ANSWER E) raise the temperature
of 1 g of the substance by 1 °C.
6) How many calories are required to increase the temperature of 13 g of ethanol from 11 °C to
23 oC? The specific heat of alcohol is 0.588 cal/g °C.
A) 0.63 cal
B) 83 cal
C) 0.54 cal
D) 170 cal
E) 92 cal - ANSWER E) 92 cal
, 7) Written in scientific notation, 0.000 000 33 is
A) 3.3.
B) 3.3 × 107.
C) 3.3 × 108.
D) 3.3 × 10-8.
E) 3.3 × 10-7. - ANSWER E) 3.3 × 10-7.
8) Written in scientific notation, 540 000 is
A) 0.54 × 106.
B) 54 × 108.
C) 5.4.
D) 5.4 × 10-5.
E) 5.4 × 105. - ANSWER E) 5.4 × 105.
9) A person who exercises regularly has 16% body fat by mass. If this person weighs 155 lb,
what is the mass, in kilograms, of body fat?
A) 11 kg
B) 25 kg
C) 70 kg
D) 155 kg - ANSWER A) 11 kg
10) Carbon monoxide (CO) in automobile exhaust is a(n)
A) element
B) compound
C) homogeneous mixture
D) heterogeneous mixture - ANSWER B) compound
