# Chemistry

posted by .

If you want to lose 1 pound of "fat," which is 20% water, how many kilocalories do you need to expend?

i don't know where to start :(

• Chemistry -

One pound = 454 grams. Subtract 20% fat to give 454-20%of 454 = about 363 grams.
I understand that fat calories = about 9 kcal/g therefore,
363 grams x 9 kcal/g = ?? kcal. This is approximate and you need to go through the steps a little more accurately. Also, the 9 kcal/g is my memory; you should confirm that number and use a different number if appropriate.

## Similar Questions

1. ### Math/115

How many hours would a person have to jump rope in order to lose 1 pound?
2. ### chemistry

On a brisk walk, a person burns about 325 Cal/h. A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. If the brisk walk were done at 2.1 mi/h, how far would the student have to walk to burn off the pound …
3. ### Physics/Chemistry

few other questions. 1.) Suppose you expend 430 kilocalories during a long walk, how many liters of ice water at 0 degrees do you need to consume in order to use up the 430 kilocalories of metabolic energy. Stomach can hold 1 liter. …
4. ### Physics/Chemistry

few other questions. 1.) Suppose you expend 430 kilocalories during a long walk, how many liters of ice water at 0 degrees do you need to consume in order to use up the 430 kilocalories of metabolic energy. Stomach can hold 1 liter. …
5. ### statistics

Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7.5 grams of fat per pound. A random sample of 34 farm-raised trout is …
6. ### statistics

Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7.5 grams of fat per pound. A random sample of 34 farm-raised trout is …
7. ### Biochemistry

If you want to lose 1 pound of "fat," which is 20% water, how many kilocalories do you need to expend?
8. ### su

A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal (remember, 1 Calorie = 1 kilocalorie). When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How long, in days, …
9. ### Chemistry

How many kilocalories does a runner expend when he runs for 4.5 h and uses 710 Cal/h?
10. ### Chemistry

How many kilocalories does a runner expend when he runs for 4.5 h and uses 710 Cal/h?

More Similar Questions