A typical diet in the United States provides 15% of the calories from protein, 4

Question

A typical diet in the United States provides 15% of the calories from protein, 45% from carbohydrates, and the remainder from fats. Calculate the grams of protein, carbohydrates, and fat to be included each day in diets having the following caloric requirements:
A) 1200 kcal B) 1900 kcal C) 2600 kcal Calculate the Cal (kcal)n I g of fat, and A het-waer botle 70 Copper is sometimes coaiod on the botion surface of oocking pam Copper ha, a cific hea of 0.385 A250g san- ple of copper heatod to 850 "C is dropped into water at an initi copperwater misture is 360 C, how many grams of wwier are present? A250-g sample ofmetal .t 98.0 "C is placed in 500gof water at 18.0 "C. if the final semperature of the alloy and wate is 274 C,what is the specific heat of the meta 71 72 A 050-g sample of vegetabile oil is placed in a calorimet a hot day, the beach sand gets hot but the water says cool. When the sample is bumed, 18.9 k.J is pives off. Whas is the energy valuecalg) of the eil? Wosuld you predict that the specific heat of sand is higher or lower than that of water? Explain CHALLENGE-QUESTIONS 73 when a oseg sample ofolive oil is burned in a cal rimeter, the heat released increases the temperature of 370 g of water from 77 Atypical diet in the Unitedsutes peides 15% ofbt calories from protein, 45% from carbhydeates, and the remainder from fats. Calculate the grams of peotele, carbohydrate, and Eat to be included each day in diets having the following calorie requirements a. 1200 kcal h. 1900 kcal .2600 kcal 227 C to 38.8 C. What is the energy value of the olive oil in kJig and kcalg? 4 When 10 g of gasoline burns, 11 500 kcal of energy are given off. If the density of gasoline is 0.66 g/ml, how many 78 A125-g piece of metal is heated so 288 85.0 g of water at 26 C. If the final temperature of the water and metal is 58.0 "C, what is the specific heat of the metal kilocalories of energy are obtained from 1.5 gal of gasoline? and dropped into 75 Apiece of copper metal (specific heat 0.385 Dg "O at 860°Cis placed in 50.0 g of water at 16.0 "C. The metal and water come to the same temperature of 240·C, what was the mass of the piece of copper? 9Rearrange the heat equation to solve for each of the following a, the mass, in grams, of water that absorbs 82501 when ins 6 Your friend has just eaten a slice of pizza, cola soft drink, and ice cream. What is the total kilocalories your friend obtained from this meal? How many hours will your friend need to swim to·turn of-the kilocalories in this meal if your friend has a mass of 70.0 kg (see Table 10 and Table 13)? h. the mass, in grams, of a gold sample that ahsoebs 225 J when e. the rise in temperature when a 20.0-g sample of iron absorbs d. the specific heat of a metal when 8.50 g of the metal absorbs temperature rises from 183 °C to 926 the temperature mes from 15.0 to 47.0 1580 1 28cai and the temperaturt rises from 12°Cso24 Item Protein (g) Fat (g) Carbohydrate (g) Pizza 13 29 51 10 Cola Ice cream 28 ANSWERS WERS TO STUDY CHECKS his is a heterogeneous mixture because it does not have a uni- nd d are chemical changes 8 146U 9 -360.J 10 182 g of insn II SH 080 C 12 40 kcalig of socrose. 17 k/g of sucrose

Explanation / Answer

Data obtained from source material
Fats = 9 Kcal/g
Proteins = 4 Kcal/g
Carbohydrates = 4 Kcal/g

A)1200kcal =protein +carbohydrates +fats
protein =0.15&1200 = 180kcal =45g
carbohydrates= 0.45*1200=540kcal=135g
fats= 0.4*1200= 480kcal=53.33g

B)1900kcal
protein =0.15&1900 = 285kcal=71.25g
carbohydrates= 0.45*1900=855kcal=213.75g
fats= 0.4*1900= 760kcal=84.44g

C)2600kcal
protein =0.15&2600 = 390kcal=97.5g
carbohydrates= 0.45*2600=1170kcal=292.5g
fats= 0.4*2600= 1040kcal=115.55g

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