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QUESTION 20
A slice of pizza contains 17 g of fat, 25 g of carbohydrate, and an unknown amount of protein. If the piece of pizza contains a total of 750 kcal,
how many grams of protein does the slice of pizza contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9.0 kcalg
for fat, and 4.0 kcal/g for protein.) Report the answer to 2 significant figures.
429
O Can not be determined from the given information.
O 649
O 749
120 g
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Answer:

Explanation:

Let the protein contained in pizza be m gram .

calories contained by 17 g of fat = 17 x 9  kcals = 153  kcals .

calories contained by 25 g of carbohydrate = 25 x 4  kcals = 100 kcals .

calories contained by m  g of protein  = m  x 4  kcals = 4 m  kcals .

Total calories of slice of pizza = 153 + 100 + 4m kcals

= 253 + 4m kcals

Given ,

253 + 4m = 750

4m = 497

m = 124.25 g .

120 g ( rounded to two significant  figures )

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