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Assume you are performing the calibration step of calorimeter and you begin with 30g of water at 20*C and 30g of water at 80*C. After adding the two portions into the calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed portions of water to be 45*C. what is the heat capacity of the calorimeter?
A 4.20 g nugget of pure gold absorbed 299 J of heat. The initial temperature was 22.0°C. What was the final temperature.
Calculate the concentration of Calcium (MW 40.078 g/mol) in the H2O in units of gram per 100 mL and calculate the concentration of Calcium (MW 40.078 g/mol) in the H2O in units of gram per 100 mL.
Calculate the weight percent composition of the mixture, using the same assumptions as in part A.
What are some ways to induce recrystallization (Name 3), if your solute refuses to recrystallize after performing the required 7 steps? the seven-step recrystallization procedure
A 12.0-g sample of ice at -19.0°C is mixed with 115.0 g of water at 72.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
A sample of 0.0020 mole of HCl is dissolved in water to make a 1500. mL solution. Calculate the molarity of the HCl solution, the [H3O+], and the pH. For a strong acid such as HCI,.
Describe how you wuld separate a mixture containing benzoic acid and a neutral substance, benzophenone. Both compounds are insoluble in water and solube in ether.
Gas Nitrous Oxide (N20) is used as an anesthetic and in aerosol cans to produce whipping cream. It is a potent greenhouse gas and decomposes slowly to N2 and O2.
Calculate the amount of heat liberated (in kJ) from 383 g of mercury when it cools from 61.0°C to 11.0°C.
If the total mass of the mixture is 452.2 g, what masses of CaCl2 and water should be used?
What mass of CaCO3 will produce 8.0 L of CO2, measured at standard temperature and pressure conditions? Molar mass of CaCO3 = 100. g per mole.
Histidine has three ionisable functional groups. Write the equilibrium equations for its three ionizations and assign the proper pKa for each ionization.
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