The total kilocalories and grams of fat for some typical meals at fast-food restaurants are listed here. Calculate the number of kilocalories and the percentage of total kilocalories from fat (1 gram of fat = 9 kcal). Round kcals to the tens place.
a. a beef burrito, 470 kcal, 21 g of fat

Question

The total kilocalories and grams of fat for some typical meals at fast-food restaurants are listed here. Calculate the number of kilocalories and the percentage of total kilocalories from fat (1 gram of fat = 9 kcal). Round kcals to the tens place.
a. a beef burrito, 470 kcal, 21 g of fat

a. a beef burrito, 470 kcal, 21 g of fat

Accepted Answer

Welcome back everyone. A serving of mixed nuts contains 200.0 kg calories of energy with 18.00 g of fat. Calculate the kilo calories resulting from fat and the percentage of total kilo calories from fat. Knowing that 1.000 g of fat is equal to 9.000 kg calories. So first of all, what we're going to do is basically focus on the mass of fat in the given serving of mixed nuts. We know that there are 18.00 g of fat. And essentially we're going to convert that fat into kilo calories. So if we want to get kilo calories, according to dimensional analysis, we want to write grams of fat at the bottom of the fraction and kilo calories at the top. And we know that 9 kg calories, 9.000 kg calories, they correspond to 1.000 g of fat. We notice that we can essentially cancel out grams of fat and this gives us kilo calories, right? So essentially if we multiply the two numbers 18 multiplied by nine in four significant figures, this gives us 162.0 kg calories. And that's the first answer to this problem. We also want to identify the percentage of total kilo calories from fat. So to estimate that percentage, we want to take the number of kilo calories, we have evaluated previously 162.0 kg calories and divide by the total number of kilo calories given in this serving. So that would be 200.0 kg calories. And of course, this is a decimal expression to convert into the percentage we multiply by 100. And if we calculate the result, we end up with 81.00% on scale four significant figures. So let's label this as our second answer. So basically we have two numbers 162.0 kg calories from fat and this corresponds to 81.00% of the total kilo calories. Thank you for watching.

The total kilocalories and grams of fat for some typical meals at fast-food restaurants are listed here. Calculate the number of kilocalories and the percentage of total kilocalories from fat (1 gram of fat = 9 kcal). Round kcals to the tens place.
a. a beef burrito, 470 kcal, 21 g of fat

Verified video answer for a similar problem:

Key Concepts

Kilocalories

Fat Content

Percentage of Total Kilocalories from Fat

The total kilocalories and grams of fat for some typical meals at fast-food restaurants are listed here. Calculate the number of kilocalories and the percentage of total kilocalories from fat (1 gram of fat = 9 kcal). Round kcals to the tens place.a. a beef burrito, 470 kcal, 21 g of fat

Verified video answer for a similar problem:

Key Concepts

Kilocalories

Fat Content

Percentage of Total Kilocalories from Fat

The total kilocalories and grams of fat for some typical meals at fast-food restaurants are listed here. Calculate the number of kilocalories and the percentage of total kilocalories from fat (1 gram of fat = 9 kcal). Round kcals to the tens place.
a. a beef burrito, 470 kcal, 21 g of fat