10. You need a water bath at 37.0 °C. The temperature of the cold tap water is 22.0 °C and the temperature of the hot tap water is 55.0 °C. What mass of hot water must be added to 90.0 g of cold water to reach 37.0 °C? The specific heat of H2O is 4.18 J/g•°C.

Q: A 6.57 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A:

Q: The enthalpy of solution (AH) of KOH is -57.6 kJ/mol. If 2.91 g is dissolved in enough water to make…

A: Given: Volume of solution = 150.0 mLDensity of solution = 1.02 g/mL.Enthalpy of solution of KOH =…

Q: A 110.0-g sample of a gray-colored, unknown, pure metal was heated to 92.0 oC and put into a…

A: Assuming specific heat of metal is C. Since all the heat released by metal in reaching the final…

Q: Sodium chloride is added in cooking to enhance the flavor of food.  When 10.0 g of NaCl is…

A: Given that 669 J of heat is absorbed. q = +669 JAs heat is absorbed in the reaction from water in…

Q: When 107 g of water at a temperature of 23.5 °C is mixed with 65.8 g of water at an unknown…

A: According to the data given in the question,Weight of water at 23.5℃ (296.5 K) = 107 gWeight of…

Q: 4. What mass of water would absorb 7.00 × 10² cal of heat if the temperature is increased from…

A: Heat of a reaction is defined as the heat  produces or absorbed during the reaction which can be…

Q: calorimeter containing 837 mL of 1.10 M acid, where the acid has a 1 to 1 molar ratio with sodium…

A: We will calculate ∆H in Kj/mol

Q: 3. When 2.0 g of NaOH is the heat of dissolution are dissolved in 49.0 g of water, the temperature…

A: 3.) First we need to calculate the heat using the formula Q = mC∆T  Then we need to calculate moles…

Q: 5. What is the mass of the water in a coffee cup calorimeter if the initial temperature is 29.2°C…

A:

Q: A calorimeter contained 69.0 g of water at 15.99°C. A 119-g sample of iron at 66.26°C was placed in…

A: Initial temperature of calorimeter will be same as that of water . Heat capacity= mass × specific…

Q: A new metal alloy was created in the laboratory for use in applications where a strong but light…

A:

Q: In a coffee-cup calorimeter, 120.0 mL of 1.4 M NaOH and 120.0 mL of 1.4 M HCl are mixed. Both…

A: coffee-cup calorimeter, 120.0 mL of 1.4 M NaOH and 120.0 mL of 1.4 M HCl are mixed. Therefore, Total…

Q: A 25.0g sample of water at 125.0°C was placed in an insulated cup. Then 25.3g of iron at 23.5°C was…

A:

Q: A 10.0 g piece of metal is heated to 80.0 ° C and placed in 100 g of 23 ° C water. When the system…

A: Specific heat of metal = 0.37  J g-1 oC

Q: 5.2 g of NaOH is added to a coffee cup calorimeter containing 861 mL of 1.10 M acid, where the acid…

A: Given molarity of acid = 1.10 M  Volume = 861 mL  Density of the solution = Density of water = 1.0…

Q: A 44.3 g sample of water at 100.00 °C (specific heat of water = 4.184J/g.°C) was placed in an…

A:

Q: A piece of unknown metal with a mass of 26.4 g is heated to 92.2 C . When added to 50.00 mL of water…

A:

Q: The heat of combustion for a sample of coal is 24.0 kJ/g. What quantity of coal (in grams) must be…

A:

Q: A calorimeter contained 65.0 g of water at 16.71°C. A 108-g sample of iron at 64.48°C was placed in…

A:

Q: 20.9 g of sodium nitrate is added to a coffee cup calorimeter. The calorimeter initially contained…

A:

Q: A 50.0 g sample of liquid water at 25 °C is mixed with 44.7 g of water at 45.0 °C. What is the final…

A:

Q: 50.0 grams of metal is heated to 100.0 C and then placed into a calorimeter containing 150 g of…

A: The specific heat capacity of the substance is the amount of heat energy required to raise the…

Q: A piece of iron is heated to 95 °C and dropped into 150 g of water at 25 °C. When equilibrium is…

A: Given, Let m ass of iron= mi=?

Q: A scientist is attempting to determine the specific heat capacity of a newly discovered metal. To do…

A: We have to calculate the specific heat of metal.

Q: When 108 g of water at a temperature of 23.1 °C is mixed with 66.1 g of water at an unknown…

A:

Q: When 46.0 g of an unknown metal at 28.5°C is placed in 94.0 g H2O at 78.5°C, the water temperature…

A: Given For unknown metals mass of unknown metal (mmetal) = 46.0 g Initial temperature of metal (Ti) =…

Q: A 148.9-g sample of a metal at 74.6°C is added to 148.9 g   at 14.7°C. The temperature of the water…

A: The mass of the metal is .The initial temperature for metal is .The final temperature for metal is…

Q: 151.0-g sample of a metal at 75.0°C is added to 151.0 g H20  at 14.2°C. The temperature of the water…

A: Solution:     Specific heat is defined as the amount of heat required to raise the temperature of a…

Q: A piece of unknown metal with a mass of 22.03 g is heated in boiling water to 90.34°C and then…

A: Given;

Q: A 85 g rock is heated to 98.7°C and placed into 125.3 g of water originally at 30.0°C . If the final…

A:

Q: What is the heat capacity of 265 grams of water? The specific heat of water is 4.184 J/g °C.

A: • The values provided in the question are:-  i) Mass of water, m = 265 g  ii) Specific heat capacity…

Q: A 5.71 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Mass of unknown salt = 5.71 gMolar mass of unknown salt = 116.82 g/molAmount of water = 150.00…

Q: A 4.81 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Given, Mass of unknown sample ,ms=4.81 g  mass of water, mw= 150 g initial temperature Ti=23.72°C…

Q: 1. In an experiment to determine the Specific Heat of Nickel, a 66.0 g sample of Nickel metal is…

A: Answer :-  The specific heat of Nickel determined by the experiment = 0.544 J/g.°C…

Q: A solution is made by mixing 197.3 g of ethanol initially at 10.5°C with 250.0 g of water initially…

A: We know that, according to the law of conservation of heat energy, energy gained or loss by the…

Q: The temperature of an object increases by 39.4 °C when it absorbs 3715 J of heat. Calculate the heat…

A: Given, Mass of the object (m) = 393 g Change in temperature (∆T) = 39.4 °C  Heat absorbed (Q) = 3715…

Q: A 22.0 g sample of pure iron at 85 °C is dropped into 73 g of water at 20. °C. What is the final…

A: Mass of pure iron sample = 22.0 g Initial temperature of pure iron sample = 85o C  Mass of water =…

Q: A metal object with mass of 20.5 g is heated to and then transferred to an insulated container…

A: when we mix to object then it grow from high temperature too low temperature . so apply principle of…

Q: A 93.82 g bar of iron was heated to 98.4 °C and then dropped into 38.1 mL of water at 15.3 °C.  The…

A:

Q: 150. g of water (Cs = 4.184 J/g°C) at 20.0 °C is added to a coffee cup calorimeter. A 35.0 g sample…

A: We use conservation of heat law in order to achieve equilibrium :- -Heat released by the solid =…

Q: A sample of 27.8 g of ammonium nitrate, NHẠNO3, was dissolved in 130.2 g of water in a coffee cup…

A: Given,  Mass of NH4NO3 = 27.8 g  Mass of water = 130.2 g  Initial temperature, Ti = 28.94 °C  Final…

Q: A student mixes 67.0 mL of a 2.01 M sodium hydroxide solution with 22.4 mL of 6.45 M hydrochloric g…

A:

Q: A 28.602 g sample of a metal is heated to 99.9°C in a hot water bath until thermal equilibrium is…

A: Let c be the specific heat of the metal Heat lost by the metal = mass x specific heat x temperature…

Q: A chemist dissolved an 10.8-g sample of KOH in 100.0 grams of water in a coffee cup calorimeter.…

A: Here we are required to find the enthalpy of solution of KOH in the unit of kJ/mol