A coal-burning power plant generates 9.53 × 1016 J per year. If the coal yields 39.0 kJ/g, how many grams of coal was burned each year?

Q: A Honda Accord gets 24 miles per gallon in the city and is estimated to emit 7 tons of CO2 per year.…

A: Given that 7 tons of CO2 emits from Honda Accord per year. 1 ton = 2000 pounds 1 tree absorb 30…

Q: Define energy and explain the importance of energy in chemistry

A: Science is knowledge about facts that are based on observations of experiments.Chemistry is one of…

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: If you have a mixture of 10 lb. sunflower seeds which cost 32¢ per pound and 16 lb. of cracked corn…

A: #Q.1: The mixture has 10 lb sunflower seeds and 16 lb cracked corn. Cost of sunflower seeds = 32¢ /…

Q: When the Statue was unveiled in 1886, it was a shiny brown color, like a penny. The reason the…

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Q: Electrical energy is usually measured in kilowatt-hours, kWh. A Watt is 1 joule per second. A…

A: Ans.    1 Cal = 4.184 joules   776 Cal =776×4.184 joules                =3246.784 joules      Now…

Q: International computer communications are often carried by optical fibers incables laid along the…

A: Given, the mass of optical fiber = 1.19 x 103 lb/m            Length of each strands optical fiber…

Q: A typical recipe for a hot toddy (a drink often used as a cold remedy) is to mix hot water with…

A: The amount of energy absorbed by 16 oz. of water is 33 kcal. The amount of hot water mixed with 1.5…

Q: Equal masses of the 3 substances were left to sit in the sun at the same time and for the same…

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Q: A cheap reliable fertilizer, NH4NO3, adds nitrogen to the soil. If you add 48.5g of fertilizer to…

A: In order to find the amount of nitogen added to the soil we first write down the given data: Mass of…

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: 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: 14K yellow gold is an alloy that contains gold, copper and silver. A 14K gold ring contains 6.90g of…

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Q: Which of the following represent a chemical change? Which of the following represents a physical…

A: We are to discuss which of gives changes are physical and chemical changes.

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: 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: A) Which term describes the conversion of substances into different substances? ionic bonding…

A: Conversion of one type of substances into other substances is take place through a reaction.

Q: Classify each of the following processes as a physical change or a chemical change and as an…

A: Hydrochloric acid is a very strong acid which also vaporises at room temperature which makes it…

Q: Read the following descriptions of the element bromine and indicate which are physical properties…

A: Density of a substance is mass of that substance in per unit volume.  Corrosion is change in…

Q: NH2 1. NANO2, H;O+ 2. H20, heat

A: The products for the given reactions has to be predicted.

Q: Lipitor, a pharmaceutical drug that has been shown to lower "bad" cholesterol levels while raising…

A: Given  The mass of the 1 pill = 1.0g  Active ingredient contain in each pill = 5.5% i.e., (5.5/100)…

Q: When butane is combusted, it reacts with oxygen in the air and forms carbon dioxide and water. If…

A: Law of conservation of mass states that , mass can neither be created nor destroyed in a chemical…

Q: The output of a plant is 4335 pounds of ball bearings per work-week (a work week = five days). If…

A: Given: Mass of each ball bearing = 0.0113 g Total mass of ball bearings formed in 5 days = 4335…

Q: mi/hr

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Q: 62. List the energy conversions that occur in the process from the time water is about to enter a…

A: The law of conservation of energy states that energy can neither be created nor destroyed it can…

Q: Lipitor, a pharmaceutical drug that has been shown to lower "bad" cholesterol levels while raising…

A: Given,2.0g pill contains 7.5% of the active ingredient by mass.Then,25 pills contains = ?

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: Digesting food is an example of what? A chemical change A physical change

A: Physical change :-  In this chemical composition of the substance does not change. Involve change in…

Q: 2.96×104 J  to Cal Express the value in Calories to three significant figures.

A: We know that, 1 Cal = 4.184 J  1 J = 1/4.184 Cal

Q: A jeepney plying the route of Blumentrit - Pier consumes 8 liters of diesel per 100 kilometers. How…

A: Given: A jeepney is plying the route of Blumentrit - Pier. 8 litres of diesel is consumed per 100…

Q: Convert 23570 mg into kg using conversion analysis

A: The given problem is 23570 mg.

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

A: Given, energy burns by human in a day=2×103 kcal  In a day, there are 24 hours.  In 1 hour,energy…

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: 1. 450 g flour and 1 L water 2. 500 ml alcohol and 1 L water 3. 300 g rice grains and 540 ml water

A: For measuring any component, we have to choose that material that can measure the simple ratio of…

Q: Classify each property as physical or chemical. a. the boiling point of ethyl alcohol b. the…

A: Physical property: Property of material which can be obtained without disturbing identity of…

Q: Round your answers to the correct number of significant figures. Only use numbers in your answer.…

A: Conversion of temperature into Kelvin scale: -173°C=-173+273.15K=100.15 K127°C=127+273.15K=400.15 K

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: Which action describes a chemical change caused by a change in temperature? O boiling an egg in a…

A: Option A is correct.

Q: The distance from Earth to the Sun is 1.50 x 10 km. What is the distance expressed in gigameters?…

A: Convert Km to Gm ---

Q: substance reacts violently with water. The substance melts at 73.59 oC. The substance was named…

A: 1. Physical properties are used to observe and describe matter. Physical properties include:…

Q: Question attached

A: The horsepower (hp) is related to power (watt) using the following unit conversion  1 hp =745.7 watt…

Q: Electrical energy is measured in kilowatt hours, kWH. A watt is 1 joule per second, a kilowatt is…

A: Killowatt hour is an unit of energy . Energy has another unit, calorie.  Different units can be…

Q: -H,0 10 g C,H1,06

A: Dear student I have given answer to your question in the image format.

Q: In a calorimetry experiment in a Chemistry for Engineers Laboratory class, a 12.9 - g sample of…

A: The addition of a certain amount of heat to a substance will alter its temperature. The change in…

Q: Automobiles are often implicated as contributors to global warming because they are a source of the…

A: In a balanced chemical reaction the reactions react and products form in the molar ratio of their…

Q: When 16 grams of methane gas combine with 64 grams of oxygen, 44 grams of carbon dioxide form, plus…

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Q: Is the following chemical or physical change endothermic or exothermic? co2 + H20 + sunlight →…

A: The chemical change is the change that substance completely changes its’s composition and formed a…