Part B and Part C, Problem 3.29 20 of24 > Part B Constants Periodic Table the gr

Question

Part B and Part C,
Problem 3.29 20 of24 > Part B Constants Periodic Table the grams of carbohydrate in one apple if the apple has no fat and no protein and provides 89 kcal of energy Express your answer to two significant figures and include the appropriate units. Using the energy values for foods (see the table) each of the following (round off the answers 38 Value Units X Incorrect: Try Again; 4 attempts remaining Part C the kilocalories in one tablespoon of vegetable ofl, which contains 15 g of fast and no carbohydrate or protein Express your answer to two significant figures and include the appropriate units alue Units 7 9. 5

Explanation / Answer

Part B : 2.2 x 101 g      (or 22 g)

Part C : 1.4 x 101 kcal      (or 140 kcal)

Explanation

Part B : It is given that apple does not contain fat or protein but only contains carbohydrates. energy provided by carbohydrate = 4 kcal/g and total energy = 89 kcal

mass of carbohydrate = total energy / energy provided by carbohydrate

or mass of carbohydrate = 89 kcal / (4 kcal/g)

or mass of carbohydrate = 22..25 g

for correct number of significant figures, mass of carbohydrate = 2.2 x 101 g      (or 22 g)

Part C : vegetable oil contains only fat.

Given mass of vegetable oil = 15 g = mass of fat

energy provide by fat = 9 kcal/g

total energy = (mass of fat) * (energy provide by fat)

or total energy = (15 g) * ( 9 kcal/g)

or total energy = 135 kcal

for correct number of significant figures, total energy = 1.4 x 101 kcal      (or 140 kcal)

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