Chemistry Chemistry Practice Problems Solutions Library

Units of Energy Solutions Library

Access 23 Units of Energy video and text solutions to help you complete your homework.

Browse Solutions

23 solutions

Units of Energy

Q. If you eat a piece of lasagna that contains 510 kcal of energy, how much energy do you consume in joules?A) 6.66 × 103 J B) 1.17 × 106 J C) 8.20 J ...

Solved • Sep 13, 2019

Units of Energy

Q. The joule is a unit of A) concentration B) pressure C) energy D) volume

Solved • Aug 5, 2019

Units of Energy

Q. A pound of plain M&M candies contains 96 g fat, 320 g carbohydrate, and 21 g protein.Table 5.5: Compositions and Fuel ValuesFuelValuekcal/g(Cal...

Solved • Oct 31, 2018

Units of Energy

Q. At the end of 2012, global population was about 7.0 billion people. What mass of glucose in kg would be needed to provide 1600 cal/ person / day of...

Solved • Oct 31, 2018

Units of Energy

Q. The combustion of 45.0 g of methane (natural gas) releases 2498 kJ of heat energy.What amount of energy (in kilocalories) would be released for the...

Solved • Oct 25, 2018

Units of Energy

Q. A 20 fluid oz. soda contains 220 Calories.For how many hours could the amount of energy in the soda light a 40 watt lightbulb? (1 watt = 1 J/s).

Solved • Oct 25, 2018

Units of Energy

Q. A 12-oz vanilla milkshake at a fast-food restaurant contains 551 Calories. What quantity of energy is this in joules?

Solved • Oct 25, 2018

Units of Energy

Q. A pint of premium ice cream can contain 1100 Calories. What mass of fat, in grams and pounds, must be produced in the body to store an extra 1.1 x ...

Solved • Oct 16, 2018

Units of Energy

Q. If an athlete expends 1950 kJ/h, how long does it take her to work off 1.0 lb of body fat? (1.0 lb needs 4.1x103 Cal of work) 

Solved • Oct 15, 2018

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 103 Calories. Express this quantity o...

Solved • Oct 15, 2018

Units of Energy

Q. Part A399 Cal to kilowatt-hoursExpress your answer using three significant figures.Part B20 J to caloriesExpress your answer using two significant ...

Solved • Sep 26, 2018

Units of Energy

Q. To vaporize 1.00 g of sweat (water) from your skin, the water must absorb 584 calories. What is that value in kilojoules?

Solved • Sep 24, 2018

Units of Energy

Q. A 2.7-g sample of rice is placed in a calorimeter. When the sample is burned 27 kJ is given off. Part AWhat is the energy value (kcal/g) for the ri...

Solved • Sep 18, 2018

Units of Energy

Q. It took 1944 J to raise the temperature of a sample of water from 15.7°C to 33.7°C. Convert 1944 J to calories.

Solved • Sep 13, 2018

Units of Energy

Q. A 0 60-g sample of vegetable oil is placed in a calorimeter. When the sample is burned, 17.9 k.J is given off. Part AWhat is the energy value (kcal...

Solved • Sep 12, 2018

Units of Energy

Q. Convert the following energy units. a) 901 kJ to J b) 3290 kcal to kJ c) 7.86 x 106 J to kcal

Solved • Jul 25, 2018

Units of Energy

Q. A chemistry grad student measures the performance Z of the new pump in his lab. The result is: Z = 7.1 kPa•mm3•s-1 Convert Z to mJ•s-1

Solved • Jul 10, 2018

Units of Energy

Q. A NASA spacecraft measures the rate R of at which atmospheric pressure on Mars decreases with altitude. The result at a certain altitude is: R = 0....

Solved • Jul 10, 2018

Units of Energy

Q. Which of the following energy quantities is equivalent to 258 Cal?a. 258 calb. 1080 Jc. 1080 kJd. 6.17 x 104 kJ 

Solved • Jun 25, 2018

Units of Energy

Q. Convert the following energy units.

Solved • Jun 12, 2018

Units of Energy

Q. The daily dietary energy requirement for an adult is 2.00 x  10 3 kcal (1 cal = 4.184 J). This is equivalent to a. 47.8 x 104 kJb. 8.37 x 103 kJ c....

Solved • Mar 15, 2018

Units of Energy

Q. A watt is a measure of power (the rate of energy change) equal to 1 J/s. (a) Calculate the number of joules in a kilowatthour.

Solved • Jul 12, 2016

Units of Energy

Q. A refrigerator uses 900 kWh of electrical energy per year. How many joules of electricity are used in two years?A. 3.24 x 109 JB. 6.48 x 109 JC. 2....

Solved • Apr 5, 2016