Chapter 3: Q.3.26 (page 73)
Convert each of the following energy units:
a. 8.1 kcal to cal
b. 325 J to KJ
c. 2550 cal to KJ
d. 2.5 kcal to J
Short Answer
(part a)
(part b)
(part c)
(part d )
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Chapter 3: Q.3.26 (page 73)
Convert each of the following energy units:
a. 8.1 kcal to cal
b. 325 J to KJ
c. 2550 cal to KJ
d. 2.5 kcal to J
(part a)
(part b)
(part c)
(part d )
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A dietitian includes one of the following mixtures in the lunch menu. Classily each as homogeneous or heterogeneous.
a. vegetable soup
b. tea
c. fruit salad
d. teat with ice and lemon slices
Associate the contents of the beakers ( to ) with segments (to ) on the following heating curve for water: ()


The label of an energy bar with a mass of lists the nutrition facts as of carbohydrate, of fat, and of protein.
Using the energy values for carbohydrates, fats, and proteins (see Table), what are the total kilocalories listed for the energy bar? (Round off answers for each food type to the tens place.)
What are the kilojoules for the energy bar? (Round off answers for each food type to the tens place.)
If you obtain , how many grams of the energy bar did you eat?
If you are walking and using energy at a rate of , how many minutes will you need to walk to expend the energy from two energy bars?

Classify each of the following mixtures as homogeneous of heterogeneous:
a. hot fudge sundae
b. herbal tea
c. vegetable oil
A 0.50-g sample of vegetable off is placed in a calorimeter. When the sample is burned, is given off. What is 4 energy value (kcal/g) for the oil? (3.5)
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