Using the energy values for foods (see TABLE 3.7), determine each of the following (round off the answer for each food type to the tens place):
a. the total kilojoules in two tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 16 g of fat, and 7 g of protein

Question

Using the energy values for foods (see TABLE 3.7), determine each of the following (round off the answer for each food type to the tens place):

a. the total kilojoules in two tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 16 g of fat, and 7 g of protein

Accepted Answer

Welcome back everyone. If the energy values of carbohydrates, fat and protein. Our four kg cows program nine kg cows per gram and four killer cows per gram respectively, determine the grams in two significant figures Of carbohydrates in a half medium size banana containing 55 kg cows and .5 g of protein. Now, we're going to need to begin by calculating the total energy gained from eating the banana which will be found from taking our energy gained from the carbohydrates. So we'll color code that with red plus our energy gained from eating fats in the banana plus the energy of protein gained from the banana. Next, we want to recall that to calculate the energy of our banana, whether it's for the protein energy, the carb energy or the fat energy. We would find that by taking the mass of our food multiplied by its energy value which is given in Killick House per gram. So our mass of our food will be in grams and the energy of our food item being our banana in this case will have a unit in Killick House. So we're going to assign the mass of carbohydrates grams of carbs, the variable Y. And with this assumption, we can say that therefore, our energy gained from and will use the color red. Our energy gained from the carbs in the banana Is equal to our mass of our banana y multiplied by the energy value for carbohydrates being four kg cows per gram. And this will simplify to four Y when we take the product. Now doing the same calculation. But for protein, The energy gained from protein in our Banana would equal the .5 g of protein given from our prompt multiplied by the energy value of protein also given as four kill cos per gram. So canceling out grams were left with kill cos and our energy of protein in our banana would result in two kill cows total of protein. And lastly, our energy of fats within our banana would equal zero kill cows. Because ultimately, the prompt gives us no information on fats gained from a banana. And so multiplied plying zero kg cows by our energy conversion of fat given as nine kg cows per gram, we would just have zero kg cows. So now to simplify, we're just going to get our total energy gained from eating the banana. So plugging in all of our notes, our total energy gained from our banana Is equal to four Y killer cows program plus our zero kg cows of fats. So the four Y kills program is again for carbs and then this is added to our two kill cows of protein gained from the banana. So now simplifying to find our total energy of our Carbs gained from the Banana four Y. We want to go back to the prompts and we're told that the Banana contains 55 kg of energy. So we can actually plug that in on the left So that we have 55 kg of energy total from the banana equal to four Y Kilic cos per grams of carbs plus zero Kilic cows of fats plus our two kg cows of protein. And so isolating for four Y Kilic cows of carbs, we're going to subtract zero Kilic cos of fats and two kg of protein from both sides of our equation. So that those terms will cancel out on the right and we will simplify in our next line so that we have 55 Kilic cos of energy total in our banana subtracted from zero Kilic cos of fats in the banana, subtracted from two Kilic cos of protein In our Banana is equal to four y kili cows per gram of carbs total. So from our difference on the left, we'll find a value of 53 kg coss Equal to four y kili cos per gram of carbs. So isolating for y we're going to divide both sides by four so that it cancels out on the right And we're specifically dividing by four kill cows program as our units. So notice that we can cancel our units of kill cows with inverse kill cows and we're left with grams. So we'll find that our mass Y Is equal to 13. g of carbohydrates in our Banana. So our final answer is when we round to a whole number, we'll just have 13 as two sick figs. So our final answer is 13 g of carbs. I hope that this made sense and let us know if you have any questions.

Using the energy values for foods (see Table 3.8), determine each of the following (round off the answer for each food type to the tens place): d. the grams of fat in one avocado that has 410 kcal, 13 g of carbohydrate, and 5 g of protein

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Key Concepts

Caloric Value of Macronutrients

Energy Balance Equation

Nutritional Calculation