Using the table on the left, calculate the total kilocalories for the meal (rounding off the kilocalories to the tens place).
Express the energy to two significant figures and include the appropriate units
Proteins(g)- 47+14
Carbohydrates(g) - 49+47+76
Fats(g)- 40+13+10
To calculate the total kilocalories for the meal, we need to multiply the grams of each nutrient by its corresponding energy value in kilocalories per gram and then sum up the results.
The energy values for each nutrient are as follows:
- Proteins: 4 kilocalories per gram
- Carbohydrates: 4 kilocalories per gram
- Fats: 9 kilocalories per gram
Let's calculate the kilocalories for each nutrient:
Proteins: (47 + 14) g = 61 g
Total protein kilocalories = 61 g * 4 kcal/g = 244 kcal
Carbohydrates: (49 + 47 + 76) g = 172 g
Total carbohydrate kilocalories = 172 g * 4 kcal/g = 688 kcal
Fats: (40 + 13 + 10) g = 63 g
Total fat kilocalories = 63 g * 9 kcal/g = 567 kcal
Now, let's add up the kilocalories for each nutrient to find the total:
Total kilocalories = Total protein kilocalories + Total carbohydrate kilocalories + Total fat kilocalories
Total kilocalories = 244 kcal + 688 kcal + 567 kcal = 1499 kcal
Therefore, the total kilocalories for the meal is 1499 kcal (rounded to the tens place) or 1.5 × 10^3 kcal (expressed with two significant figures and appropriate units).
To calculate the total kilocalories for the meal, we will use the following conversions:
- 1 gram of protein = 4 kilocalories
- 1 gram of carbohydrates = 4 kilocalories
- 1 gram of fat = 9 kilocalories
First, let's calculate the total kilocalories from proteins:
Proteins(g) = 47 + 14 grams
Total kilocalories from proteins = (47 + 14 grams) * 4 kilocalories/gram
Total kilocalories from proteins = 61 grams * 4 kilocalories/gram
Total kilocalories from proteins = 244 kilocalories
Next, let's calculate the total kilocalories from carbohydrates:
Carbohydrates(g) = 49 + 47 + 76 grams
Total kilocalories from carbohydrates = (49 + 47 + 76 grams) * 4 kilocalories/gram
Total kilocalories from carbohydrates = 172 grams * 4 kilocalories/gram
Total kilocalories from carbohydrates = 688 kilocalories
Finally, let's calculate the total kilocalories from fats:
Fats(g) = 40 + 13 + 10 grams
Total kilocalories from fats = (40 + 13 + 10 grams) * 9 kilocalories/gram
Total kilocalories from fats = 63 grams * 9 kilocalories/gram
Total kilocalories from fats = 567 kilocalories
Therefore, the total kilocalories for the meal is:
Total kilocalories = Total kilocalories from proteins + Total kilocalories from carbohydrates + Total kilocalories from fats
Total kilocalories = 244 kilocalories + 688 kilocalories + 567 kilocalories
Total kilocalories = 1499 kilocalories
Rounding off the kilocalories to the tens place, the total kilocalories for the meal is approximately 1500 kilocalories.