The Nutrition Facts label for crackers states that one serving contains 19 g of carbohydrate, 4 g of fat, and 2 g of protein. What is the energy, in kilocalories, from each food type and the total kilocalories for one serving of crackers

The amount of kilocalories contained in the given serving of crackes is 0.120 kCal

Explanation:

As per the USDA:

Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram

We are given:

Mass of fat in the crackers = 4 g

Mass of carbohydrates in the crackers = 19 g

Mass of protein in the crackers = 2 g

Conversion factor used:  1 kCal = 1000 Cal

Applying unitary method:

1 gram of fat provides 9 calories

So, 4 gram of fat will provide =

1 gram of carbohydrates provides 4 calories

So, 19 gram of carbohydrates will provide =

1 gram of proteins provides 4 calories

So, 2 gram of fat will provide =

Total kilocalories per serving = [0.036 + 0.076 + 0.008] kCal = 0.120 kCal

Hence, the amount of kilocalories contained in the given serving of crackes is 0.120 kCal