Chemistry Homework Help

24/7 Chemistry Homework Help

Get step-by-step solutions from expert tutors.

How it works?

Ask a question

Type, take a picture, or paste your question with all necessary details to ensure high-quality responses.

Get an answer in less than 24hrs

Once our tutors receive the question, they'll begin. You'll get an email once the solution is ready.

Get Notified

We will send you email and text notification to let you know when your question is answered.

Browse Homework Solutions

17 solutions

Units of Energy

Q. The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 x 10^3 Calories. If a runner expends 1850 kJ/h, how long (h) does she have to run work off 7.57 lb of body fat? Enter your answer in decimal format with one decimal place.

Solved • Mar 30, 2020

Units of Energy

Q. The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.10 x 10^3 Calories. If a runner expends 1850 kJ/h, how long (h) does she have to run to work off 6.05 lb of body fat? Enter your answer in decimal format with one decimal place.

Solved • Mar 23, 2020

Units of Energy

Q. How many joules are released when 1.00 mol of 239-Pu decays if each nucleus releases 5.243 MeV? Enter your answer in scientific notation.

Solved • Nov 26, 2019

Units of Energy

Q. How many MeV are released per nucleus when 2.60 x 10^-3 mol of chromium-49 releases 8.11 x 10^5 kJ?

Solved • Nov 26, 2019

Units of Energy

Q. Arsenic-84 decays with an energy of 1.57 x 10^-15 kJ per nucleus. (a) Convert this energy into electron volts: Enter your answer in scientific notation. (b) Convert this energy into MeV:

Solved • Nov 26, 2019

Units of Energy

Q. A 3-H nucleus decays with an energy of 0.018888 MeV. Convert this energy into (a) electron volts; (b) joules. Enter your answer in scientific notation.

Solved • Nov 26, 2019

Units of Energy

Q. The label on packaged food indicates that it contains 215 Cal per serving. Convert this amount of energy to joules. (a)51.4 J (b)5.14 × 104 J (c)5.14 × 10−2 J (d)9.00 × 102 J (e)9.00 × 105 J

Solved • Nov 17, 2019