How many Calories (that is, kilocalories) are in a 37.8g serving of potato chips if we assume that they are essentially 50% carbohydrate, and 50% fats? [Energy from Food, p. 189 in the textbook]
37.8 x 1/2 = g carbs
37.8 x 1/2 = g fat
g carbs x 4 kcal/g = ?
g fats x 9 kcal/g = ?
Total kcal = kcal from carbs + kcal from fats.
To calculate the number of calories in a 37.8g serving of potato chips, assuming they are 50% carbohydrates and 50% fats, you can follow these steps:
Step 1: Determine the amount of carbohydrates and fats in the serving size.
Since the serving contains 50% carbohydrates and 50% fats, we need to calculate the amount of each nutrient.
Carbohydrates:
50% of 37.8g = 0.5 × 37.8g = 18.9g
Fats:
50% of 37.8g = 0.5 × 37.8g = 18.9g
Step 2: Calculate the number of calories from carbohydrates and fats.
Both carbohydrates and fats provide a certain number of calories per gram.
Carbohydrates:
Carbohydrates provide 4 calories per gram.
Number of calories from carbohydrates = 18.9g × 4 cal/g = 75.6 calories
Fats:
Fats provide 9 calories per gram.
Number of calories from fats = 18.9g × 9 cal/g = 170.1 calories
Step 3: Calculate the total number of calories in the serving.
To find the total number of calories in the serving, you need to add the calories from carbohydrates and fats together.
Total number of calories = Calories from carbohydrates + Calories from fats
Total number of calories = 75.6 calories + 170.1 calories = 245.7 calories
Therefore, there are approximately 245.7 calories in a 37.8g serving of potato chips when assuming they are 50% carbohydrates and 50% fats.
To calculate the number of calories in a serving of potato chips, we need to know the energy content of carbohydrates and fats. According to the information provided that potato chips are essentially 50% carbohydrate and 50% fat, we can find the respective caloric values for each nutrient.
1 gram of carbohydrates provides approximately 4 calories, while 1 gram of fat provides around 9 calories.
First, let's calculate the amount of carbohydrates and fats in the serving of potato chips:
Carbohydrates: 50% of 37.8g = 0.5 * 37.8g = 18.9g
Fats: 50% of 37.8g = 0.5 * 37.8g = 18.9g
Now, calculate the calories from each nutrient:
Calories from carbohydrates: 18.9g * 4 calories/g = 75.6 calories
Calories from fats: 18.9g * 9 calories/g = 170.1 calories
Finally, sum up the calories from carbohydrates and fats:
Total calories in the serving of potato chips = Calories from carbohydrates + Calories from fats
Total calories = 75.6 calories + 170.1 calories
Therefore, a 37.8g serving of potato chips would contain approximately 245.7 calories.