Question

part d determine the total kilocalories for a diet that consists of 61 g of carbohydrate, 8 g of fat, and 190 g of protein. express your answer to two significant figures and include the appropriate units.

Explanation:

Step1: Calculate energy from carbohydrate

The energy per gram of carbohydrate is 4 kcal/g. For 61 g of carbohydrate, the energy is $61\ g\times4\ kcal/g = 244\ kcal$.

Step2: Calculate energy from fat

The energy per gram of fat is 9 kcal/g. For 8 g of fat, the energy is $8\ g\times9\ kcal/g=72\ kcal$.

Step3: Calculate energy from protein

The energy per gram of protein is 4 kcal/g. For 190 g of protein, the energy is $190\ g\times4\ kcal/g = 760\ kcal$.

Step4: Calculate total energy

Add up the energies from carbohydrate, fat and protein: $244\ kcal+72\ kcal + 760\ kcal=1076\ kcal$. Rounding to two - significant figures, we get $1.1\times10^{3}\ kcal$.

Answer:

$1.1\times 10^{3}\ kcal$