Answer to Question #167157 in General Chemistry for Daayer

Question

A plant requires approximately 5689 kcal for the production of 1.00 kg of starch from carbon dioxide and water.

Calculate the energy in kilocalories required by a plant for the production of 8.69 g of starch.

Energy=..........kcal

Please with the steps..

Answer 1

1.00 kg should be converted to grams for units to be the same: 1.00 kg = 1000 g.

Then there is just a proportion:

5689 kcal - 1000 g of starch

x kcal - 8.69 g of starch

$x=\frac{8.69g\times5689kcal}{1000g}=49.4kcal$

Answer: 49.4 kcal