Answer to Question #197980 in General Chemistry for Riane

Question

A serving size of six cookies contains 4 g of fat, 20 g of carbohydrates, and 2 g of protein. If walking 1.0 mile consumes 170 kJ of energy, how many miles must you walk to burn off enough calories to eat six cookies? Assume the energy content of fats, carbohydrates, and proteins are 8 kcal/g, 4kcal/g, and 4 kcal/g, respectively.

Answer 1

Given: Six Cookies contains : 4g fat + 20g Carb. + 2g protein

1.0 mile consume 170KJ of energy.

Total energy = $4\times8\ + 20\times4\ +2\times4= 120 kcal/g$

so for consuming 6 cookies we walk = $\dfrac{120}{170}$

0.705 miles.