If 7.5 g of KBr were dissolved in 100. g of water, how much heat (kJ) was involved? (2 Significant Figures)

Q: If the specific heat of a solution is 4.18 J/goC, and you have 161 mL (1.03 g/mL) which increases in…

A: Mass of solution in grams is determined as follows,

Q: A 1423 kg car is traveling down the road at 94.2 km/h. While traveling at this rate of speed, what…

A: The kinetic energy of any moving objects is 12mv2, where m is the mass of the object and v is the…

Q: A 1261.8kg car is traveling down the road at 81.81 km/h. While traveling at this rate of speed, what…

A: The kinetic energy of the vehicle in kilojoules is = 325.8 kJ

Q: A neutral solution of water at a particular temperature has a concentration of OH- of 4.5 × 10-7 M.…

A: Water molecule can act as acid as well as base. Hence it can give or take H+ ions. The auto…

Q: 1. A student determines the molar mass of acetone, CH.COHS, by the method used in this experiment.…

A: Mass of solute = 10.5 gMass of solution = 86.4 g

Q: 6) Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter at 22.4 °C causes the…

A: Solution The reaction is said to be an exothermic reaction, when the heat of the solution is…

Q: If the specific heat of a solution is 4.18 J/goC, and you have 209 mL (1.03 g/mL) which increases in…

A: Given: Specific heat capacity of water = 4.18 J/g. °C The volume of water = 209 mL The density of…

Q: CAI = 0.22 kcal/kg°C A 0.60 kg length of aluminum wire is warmed by 22.3°C by an electric current.…

A: Heat is a form of energy  Which is given by  q° mc∆T  Where m= mass  C = specific heat  T=…

Q: Conside 'pothetical chemical reaction: A+B → C+D (In this equation A, B, C and D stand for some…

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Q: Joules (J) are a measure of energy.  Chemists often measure energy in calories (cal).  If 1 cal =…

A:

Q: A calorimeter is charged with 57.9 mL of water at 25.0 °C. After a reaction takes place in the…

A: Given, Volume of water = 57.9 mL Density of water = 1.00 g/mL Initial temperature (Ti) = 25°C Final…

Q: In fertilizer, 15.0 g of urea (NH2 CONH2) is dissolved in 250 mL of water. A temperature change from…

A: Given that,  Amount of urea,  = 15.0 g Volume of water, m= 250 mL  = 250 g * density of water at…

Q: i need the answer quickly

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Q: A calorimeter is pictured below. When substances are dissolved in water, they can absorb or release…

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Q: How many calories of energy does it take to heat 17.10 grams of water from 30.3 °C to 85.1 °C? Note:…

A: •Firstly discuss about SPECIFIC HEAT:-Specific heat is required energy in calories to increase…

Q: cal energy content when eaten 5 1.15 X 10 0 0 kcal 1 85.0 0 kJ 0 188.

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Q: 4.33g sample of an unknown salt (MM=116.83g/mol) is dissolved in 150.00g water coffee cup…

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Q: A student places a block of hot metal into a coffee cup calorimeter containing 162.2 g of water. The…

A: 162.2 g of water.T1 = 21.3 oCT2 = 37.6 oC

Q: a 0.2500g sample of a pretzel is burned . The heat it gives off is used to heat 50.00g of water from…

A: Amount of heat liberated: It is calculated as,

Q: CHEMISTRY (Please write the complete solution legibly. Choose the correct answer. No long…

A: When the enthalpy change is positive then it is endothermic reaction.  When the enthalpy change is…

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 will the temperature of a cup (176 g) of coffee at 94.8 °C be reduced (in °C) when a 45 g…

A: Given, mass of cup of coffee,mc = 176 g initial temperature of cup , Tc=94.8°C mass of silver spoon…

Q: hen 1.0 gg of gasoline burns, it releases 11 kcal of heat. The density of gasoline is 0.74 g/mLg/mL.…

A: Given : Energy = 11Kcal. Amount of gasoline = 1.0 gallon.

Q: A 70.0 gram metal bar is heated to 256 celsius then submerged into a well insulated calorimeter…

A: Given mass of metal bar Mb = 70g  Mass of water Mw = 50g  Complete solution is given below in next…

Q: When NH4Cl(aq) reacts to form NH3(g) and HCl(aq), 21.07 kcal of energy are absorbed for each mole of…

A: We have to determine the value of ∆H for the given reaction

Q: Under certain nonstandard conditions, oxidation by O2 (9) of 1 mol of SO2(g) to SO3(g) absorbs 89.8…

A: Given : SO2 reacts with O2 to produce SO3. Heat of formation of SO3 = -204.1 KJ/mol And 1 mole of…

Q: In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a…

A: Mass of chromium, m1 = 18.5 g Mass of water, m2 = 81.3 g Temperature of chromium, T = 98.04 °C…

Q: a 176 g china serving bowl is warmed 58.3°C when it absorbs 2.0 kcal of heat from a serving of hot…

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Q: What would be the final temperature of 1 gallon of water (3.785 L) if you added 1.218 x 103 kJ of…

A: we need to find the final temperature of water under given conditions

Q: q= 4.184 heat energy in joules. Use the formula: q=(m)(c)(ΔT) where m=mass of water being heated in…

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Q: 3. A 1.25-g sample of ammonium nitrate dissolves in water to make 35.0 mL of solution in an…

A: Given,  Mass of NH4NO3 = 1.25 g  Volume of the solution = 35.0 mL  Initial temperature= Ti = 24.6 0C…

Q: 11 g of CaCl₂ are dissolved in 125 g of water. The calorimeter indicates a temperature change of…

A: Given the mass of water taken, m = 125 g Temperature change of water, ∆T = 2.5 oC

Q: When (3.4100x10^2) Joules of heat are added to a sample, the temperature increases from…

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Q: How many Joules are there in 54.0 kcal? (1 cal = 4.184 J)

A: One calories is equal to 4.184 joule.                1 kcal = 1000 cal.…

Q: How many Joules are there in 43.3 kcal? (1 cal = 4.184 J)

A: The conversion of quantity from one unit system to another unit system is known as unit conversion.…

Q: equivalent

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Q: Calculate AT from the temperatures extrapolated to the time of mixing: AT = temperature of mixture –…

A: Interpretation: To fill the details in the table. Given data: From the experimental steps, we can…

Q: A sample of gold weighing 7.7 grams is cooled then placed in a calorimeter containing 27.01 grams of…

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Q: If reacting 3.08 g of chlorine monoxide (ClO), a highly reactive radical, with an excess of ozone…

A: Chlorine oxide reacts with ozone to form chlorine radical and oxygen gas. The equation for the…

Q: Benzene is a chemical compound in gasoline. When gasoline burns, the benzene reacts with oxygen. 2…

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Q: When 3.02 g of NH4Cl  is dissolved in enough water to make 20.05 mL of solution, the temperature…

A: To find enthalpy change, first find q of reaction by using formula of q. Then divide the calculated…

Q: 1. A student determines the molar mass of acetone, CH.COHS, by the method used in this experiment.…

A: Mass of acetone = 10.5 gMass of solution = 86.4 g

Q: It took 1295 J to raise the temperature of a sample of water from 17.3 °C to 38.7 °C. Convert 1295 J…

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Q: A chemical reaction is carried out in a 30.0 g calorimeter. The calorimeter has a specific heat of…

A: Here the heat released by the reaction is absorbed by both the calorimeter and water inside the…

Q: 4. A student measures an initial temperature of 25.00 °C for a 100.0 gram sample of water in the…

A: