A reaction releases 421 kJ of energy. How many kilocalories does this correspond to?

Q: The average adult human burns 2.00 × 10³ kcal per day in energy. What is this rate in kJ per hour?

A: The unit conversions are  1 kcal = 4.184 kJ To convert kcal into kJ , we need to multiply kcal with…

Q: A coal-burning power plant generates 9.53 × 1016 J per year. If the coal yields 39.0 kJ/g, how many…

A: Amount of heat generated each year = 9.53 × 1016 J = 9.53 × 1013 kJ Amount of heat generated from 1g…

Q: if a gas stove releases 120 kJ of heat energy, what is the energy in kilocalories? (1 cal = 4.184 J)

A: Relation : 1 cal = 4.184 J 1 J = 14.184 cal 120 kJ = 120 x 14.184 kcal            = 28.68 kcal

Q: A student eats pasta to fuel her for the track competition the next day. As converted to energy,…

A: Law conservation of energy states that energy can neither be created nor destroyed.

Q: If a wheelchair-marathon racer moving at 13.1 miles per hour expends energy at a rate of 655…

A: Given ;   Racer move=13.1 miles/hour  Expands energy=655 cal/hour  Energy required to complete…

Q: 54. Perform each conversion. (a) 345 Cal to kilowatt-hours (b) 23 J to calories (c) 5.7 × 10° J to…

A: Hi, since you have posted questions with multiple subparts we will answer first three subparts for…

Q: A 152.0 g ball traveling at a speed of 2.30 m/s has a kinetic energy of Answr J

A: The kinetic energy of the ball is given by: where m = mass of the ball = 152.0 g v = velocity of…

Q: A college student produces about 101 kcal of heat per hour on the average. What is the rate of…

A: According to the rule of conversion of the unit, 1 cal is equal to 4.184 J So, (1×103) cal is equal…

Q: A pan containing 1000 g of water is heated from 20 C to 100 C . Calculate the number of calories…

A: The number of calories needed to heat 1000g of water from 20°C to 100°C  may be calculated by using…

Q: A coal-burning power plant generates 3.5 x 1016J per year. If the coal yields 37 kJ/g, how many…

A: The amount energy produced by coal burning power plant per year = 3.5 x 1013 kJ

Q: In a calorimetry experiment, a 41.9 g piece of metal at 110. °C is put into a cup of cool water that…

A: GivenMass of water = 92.1 g = MInitial Temperature of water = Ti = 22.0°CFinal Temperature of water…

Q: How much heat is required to raise the temperature of 34.0 g of water from-15 °C to 145 °C? heat:…

A: Given mass of water is 34.0g Initial temperature is -15oC. Final temperature is 145oC. How much heat…

Q: how many grams of coal was burned each year?

A: Given :-  amount of energy generated per year = 6.53 × 1016 J  per gram coal gives 33.0kJ of energy…

Q: A ball has a kinetic energy of 4.50 kJ. If the ball has a mass of 120.0 g, how fast is the ball…

A:

Q: A water heater contains 58 gal of water. Part A How many kilowatt-hours of energy are necessary to…

A: The question is based on the concepts of calculation of heat. we have to calculate amount of heat…

Q: The specific heat of Uranium is 0.12 Joules / Uranium x Celcius. Convert the specific heat of…

A: Given :  Specific heat of  uranium = 0.12 Joules / gram x Celsius

Q: A water heater contians 59 gallons of water. How many kilowatt-hours of energy are necessary to heat…

A: The amount of heat energy required is related to specific heat capacity as,…

Q: In metric terms, a typical automobile averages 5.76 km/L of gasoline burned. Gasoline has a heat of…

A:

Q: If 10 grams of 20 degree water is heated up to 40 degrees, how many calories were transferred?

A: Given: Mass of water = 10 g. Initial temperature of water = 20 oC And final temperature of water =…

Q: How many kilocalories are present if 81J are produced?

A: Given the energy produced in J = 81 J We have to convert 81 J to kilocalories (kcal). First, we have…

Q: A piece of metal was placed into a 75.00 grams of water. The temperature of the water increased from…

A: Given , mass of water = 75.00 g Initial temperature Ti= 22.02°C Final temperature, Tf = 25.04°C…

Q: How many calories 5000 Joules are?. No computation, no points

A: There are different units of heat-  1- joule 2- calorie

Q: An adult eats food whose nutritional energy totals approximately 2400 Cal per day. The adult burns…

A: Energy intake = 2400 Cal per day. Energy consumed = 2200 Cal per day.

Q: If a person practicing yoga for one hour burns 235 kilocalories (kcal), how many joules (J) of…

A: Answer : We have to calculate energy in terms of Joules . Explanation : Person is practising yoga…

Q: Which of the following is a unit of energy? Mol Kelvin Btu Gram

A: Units are used to measure physical quantities such as time, length.

Q: How many kilocalories are required to heat 100g of water from 34.2°C to 96.5°C?

A: Since the heat required for the heating process is given by  Q = mCΔT  where Q = heat or energy…

Q: Suppose that a person eats a diet of 2383 Calories per day. Convert this energy into joules.

A: Suppose that a person eats a diet of 2383 Calories per day. This energy is to be converted into…

Q: We use the density of water to calculate the mass of water from its volume. The density of water at…

A: Given, density of water =0.998 gmLvolume of water in calorimeter filled =104.6 mLwe are asked to…

Q: 4. An athlete eats food in order to get energy for their competition that day. What type of energy…

A:

Q: If a gas stove releases 180kJ of heat energy, what is the energy in kilocalories? (1 cal = 4.184 J)

A: Thermodynamic  is branch of chemistry in which we deal with amount  of heat evolved or absorbed by…

Q: Energy can be divided into two types. What are these types and give an example of each.

A: Energy is the ability to do work: the ability to cause change: all energy can be transferred.

Q: Calculate the kilocalories needed to heat 4.5 kg of water from 22 Celsius to 23 Celsius

A: Energy is required to raise the temperature of water from 22 degree C to 23 degree C.

Q: A solar cooker uses sunlight. What kind of energy does it use? a chemical b mechanical c sound d…

A: Many of the solar cookers currently in operation are relatively cheap, low-tech machines, but some…

Q: A water heater contains 54 gal of water. How many kilowatt-hours of energy are necessary to heat the…

A: Step 1-We have to calculate the value of energy in kilowatt hours necessary to heat the given water…

Q: if a food label identifies the total number of kilocalories in a bowl of cereal as 140 and the…

A: The total energy in a bowl of cereals = 140 kilocalories  The energy supplied by carbohydrates =…

Q: Which of the following units of energy is defined as the heat it takes to raise the temperature of 1…

A: Correct Answer - E) calorie  Because calorie is defined  as the amount  of heat is required  to…

Q: A hot tub is filled with 570 gal of watera. What is the volume of water, in liters, in the tub?b.…

A: a.The volume of water in liters is given by

Q: The average adult human burns 2.00 × 10° kcal per day in energy. What is this rate in kJ per hour ?

A: Given: Energy= 2.00×103 To find: The rate of energy in kJ per hour

Q: An adult eats food whose nutritional energy totals approximately 2100 Cal per day. The adult burns…

A:

Q: A ball has a kinetic energy of 4.50 kJ. If the ball has a mass of 120.0 g, how fast is the ball…

A:

Q: Energy required to heat 10.0 g of silver from 112 °c to 275 °c. Answer in joules and calories

A: The amount of heat : Q = m . c . delta T m = mass in grams c = specific heat = 0.233 J/goC delta T =…

Q: If a television requires 150 kJ/h to run, how many hours can the television run on the energy…

A: 1 gallon of gasoline has energy equal to 33.7 kWh 1kWh = 3600000 J/s 33.7 kWh = 33.7 X 3600000 J/s =…

Q: A 54-woman eats a 450 Calorie hamburger for snacks. How many joules of energy is the equivalent of…

A: Energy is the capacity to do work. There are different units to measure energy. They are measured in…

Q: Units of Energy?

A: 1.) Joule It is the amount of energy transferred to an object when one newton force is applied to…

Q: If a glass of water and a lake have the same temperature, which has more thermal energy?

A:

Q: A water heater contains 60 gal of water. How many kilowatt-hours of energy are necessary to heat the…

A: Conversion of the units of volume from gallon to mL: The mass of water can be calculated as given…

Q: How many kilocalories are lost when 580g of water cools from 67 degrees celsius to 22 degrees…

A: Given : Mass of water = 580 g Initial temperature of water = 67 oC And final temperature of water =…

Q: A typical candy bar contains 281 food Calories, which is 281 kcal. How many kilojoules are contained…

A: Given that : Energy provided by one candy bar = 281 kcal. We have to calculate the kilojoules of…

Q: A ball has a kinetic energy of 3.60 kJ. If the ball has a mass of 120.0 g. how fast is the ball…

A: