The energy needed to keep a 75-watt lightbulb burning for 1.0h is 270kJ. Calculate the energy required to keep the lightbulb for 5.0h in each of the following energy units. joules Express your answer using two significant figures E= ? J kilocalories Express your answer using two significant figures E= ? kcal

Q: write the correct answer for the question

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Q: If a household uses 793. kWh of electricity per month, how many MJ of energy (from electricity) does…

A: Given Use of electricity = 793 kWh To find  Energy in MJ

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

A: Given nutritional energy = 2100 cal Calories burnt = 1800 cal

Q: A 73 kg student traveling in a car with a constant velocity has a kinetic energy of 2.0  104 J. What…

A: • Here is given that,      Mass of student, m  = 73 kg • Since, he is travelling with a constant…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.97 kg sample…

A: We know that heat involved and specific heat capacity of a system are related by the equation- ∆H =…

Q: What is AH when 1.40 mol of Sg reacts? Be sure your answer has the correct number of significant…

A: ∆H of the given reaction is = -20. 2 kJ  Given moles of S8 = 1.40 moles

Q: A person weighing 85 kg running at 16 km/hr requires 4245 kJ of energy per hour. How far must this…

A: Mass of Sugar  =  0.690 Kg1 Kg  = 1000 g0.690 Kg = 0.690*1000 g = 690 gso mass of sugar  = 690 g1 g…

Q: One cup of soft-serve ice cream contains 43 g of carbohydrate, 11 g of protein, and 24 g of fat. How…

A: Given :  Mass of carbohydrate in ice cream = 43 g  Mass of protein in ice cream = 11 g  Mass of fat…

Q: A 228-g coin made of zinc is heated and placed in 100.0 g of water at 16.0°C. The temperature when…

A: The heat change during a chemical reaction is ; q=mc∆Tm=mass of substancec=specific heat…

Q: Calculate the calories needed to heat 7.9 grams of water from 15 degrees Celsius to 33 degrees…

A: Mass of water (m) = 7.9 g Initial temperature (Ti) = 15°C Final temperature (Tf) = 33°C Calories…

Q: One hour of bicycle riding can require 500-900 kcal of energy, depending on the speed, the terrain,…

A: Given : rate of energy consumed = 505 Kcal/hr Mass of fat to lose = 21.0 lbs Energy of 1 g of fat =…

Q: If a gas furnace releases 450 kcal of heat energy, what is the energy in kilojoules? (1 cal = 4.184…

A: Energy is the capacity to do work. There are different units for energy. They are, calories, joules,…

Q: Mass of Can: 13 grams Mass of can and water: 93.3 grams Initial food sample: 3.30 grams final food…

A: Answer:In this problem, to find out the calorific value of heat its premeasured value of mass is…

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

A:

Q: How many times more kinetic energy does the dump truck have than the car?

A: Given: Mass of sub compact car =1.6×103 Kg Mass of dump truck =1.70×104 Kg Speed of both truck and…

Q: None

A: Completed Table:| Food | Energy Content (kcal) | Energy Content (kJ) || Small apple | 95  | 397 ||…

Q: You are camping and wish to bake an apple crisp using your butane cooker. The crisp needs 1.5 x 103…

A: Answer:In this problem we have to find out the energy that can be produced by 100g butane and then…

Q: Question 12 of 41 > A 1599 kg car is traveling down the road at 95.4 km/h. While traveling at this…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 236.0 mg sample…

A: We know that q = mc∆T ....(1)  q = heat required = 3.7 J, ∆T = increase in temperature = 11.6 °C…

Q: Calssify the following process as endothermic or exothermic. A match burns  Ice melts  Molten metal…

A: When heat is released from the system then reaction is called exothermic and when heat is absorbed…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 748.0 mg sample…

A:

Q: A 1445 kg car is traveling down the road at 96.6 km/h. While traveling at this rate of speed, what…

A: Given : Mass of car = 1445 kg Speed of car = 96.6 km/hr  To calculate :- Kinetic energy (in kJ)

Q: When 1 mole of HCI(g) reacts with NH3(g) to form NH CI(s) according to the following equation, 176…

A: We have to predict nature of reaction and q value.

Q: Find the kinetic energy of the ball.

A: Given :- mass of ball (m) = 23.44 kg                speed of ball (v) = 2.55 m/s  To calculate :-…

Q: A 4.7-gram metal is heated to 86.7 degrees Celsius . It is then placed inside a coffee-cup…

A:

Q: What is the kinetic energy (in J) of a 2240-pound automobile traveling at 67.8 km per hour? x 10 J

A: For an Automobile, Mass, m = 2240 pound  Velocity = 67.8 km hr-1  Kinetic Energy, Ek = ?

Q: Decide how the objects in the following table would be listed, if they were listed in order of…

A:

Q: A student places a block of hot metal into a coffee cup calorimeter containing 163.5 g of water. The…

A: Equation for the heat absorbed ( q )   q  =  m  ×  C  ×  ΔT  m = mass C = Specific heat capacity ΔT…

Q: took 1217 J to raise the temperature of a sample of water from 12.7 °C to 27.5 °C. onvert 1217 J to…

A: One calorie = 4.184 joule

Q: A sample of mercury at 14.0°C is warmed to 128.0°C when 795 cal of heat is added. What is the mass…

A: Amount of heat,Q required to change the temperature of a substance of mass ,m and specific heat…

Q: A metal sample weighing 129.50 grams and at a temperature of 98.8 degrees Celsius was placed in…

A:

Q: The energy needed to keep a 75 - watt light bulb burning for 1.0 h is 270 kilo joules. Calculate the…

A: According to the question, The time for the burning of the bulb = 1.0 h The energy os given by = 270…

Q: Be sure to answer all parts. What is the change in internal energy (in J) of a system that releases…

A: 1) Given :-  Work done = 9.50×102(cal)  Heat release = 675 J  Change in internal energy = ∆U = ?…

Q: A metal sample weighing 126.00 grams and at a temperature of 96.8 degrees Celsius was placed in…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of 1 kg…

Q: Decide how the objects in the following table would be listed, if they were listed in order of…

A: Due to technical error ,unable to provide you the solution. Please resubmit the question once again

Q: 6 kWhkWh to joules Express your answer using two significant figures.   Convert 229 cal to…

A: In this question, we need to convert the given value from one unit to another unit using the…

Q: Calculate the kinetic energy of a 1401 kg vehicle travelling at 96.6 km/h. Ex= kJ

A:

Q: propane (C:H8) produces 2220 kJ of = consumed. What mass in grams of eat 55.0 gal of bathtub water…

A: According to the question, the combustion of propane will produce 2220 kJ of energy per mole.  We…

Q: 1 A frozen TV dinner contains 28 g of protein, 67 g of carbohydrate, and 13 g of fat.  What is the…

A: Given, A Frozen TV dinner contains, mass of protein = 28 g mass of carbohydrate = 67 g mass of fat =…

Q: The thermochemical equation for the reaction between sodium and magnesium chloride is shown below .…

A: Given reaction  MgCl2 (s) + 2Na(l) <----> 2NaCl (s) + Mg(s) ∆H° = -45.2kcal

Q: One hour of bicycle racing can require 500-900 kcal of energy, depending on the speed of the race,…

A:

Q: Calculate the energy needed to heat the cube of silver, with a volume of 10.0^3cm, from 12 degrees…

A:

Q: What is the Kinetic energy of a 2000-Ib car traveling at 59 miles per hour? (Ib =0.4536 kg, 1 mi=…

A: The Kinetic energy of a 2000-lb car traveling at 59 miles per hour is calculated as,1lb =0.4536…

Q: Complete the following table. Round each of your answers to 3 significant digits. food an ounce of…

A: This problem is based on significant figures.Here we have to convert calorie(cal) to kilocalorie…

Q: Calorimetry Chart Mass of Food 20.7 g 3.2 g Mass of Food residue (after burning) Volume of water…

A: Here, food item was burned and subsequently heat of water increases . thus we see rise in…

Q: One hour of bicycle racing can require 500-900 kcal of energy, depending on the speed of the race,…

A: Given : Amount of energy required = 650.0 Kcal/hr 1 Kcal = 4.184 KJ Time of cycling = 175 mins  And…

Q: How many calories of heat (energy) would it take to heat 13.0 g of water from 35.0 °C to 55.0 °C? q…

A: