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When 10.0 g of potassium bromide dissolve in 50.0 g of water in a coffee-cup calorimeter, the temperature drops from 18.0°C to 9.5°C. Assume that all the heat is absorbed in the solution process comes from the water. (Specific heat of water = 4.18 J/g•°C.)(a) Write a balanced equation for the solution process.
A gaseous mixture containing 0.220 mol fraction of carbon tetrachloride (CCl4) and 0.780 mol fraction of dry air is initially at 75.0°C and 1117 mmHg
What is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants?
If the heat capacity of the calorimeter itself (not including the internal water) is 20.4 J/°C and the final temperature of the calorimeter and water bath is 23.3 °C, what is the enthalpy of combustion of the new compound?
How mush heat energy is reuired to melt one ice cube in a soft drink to form liquid water at 0 degrees C, if the ice cube has a mass of 18.9 g?
copper has two isotopes:cu-63 (abundance= 69.2%, mass= 62.930 amu) and cu-65 (abundance= 30.8% mass= 64.428 amu). calculate the (average) atomic mass of copper.
Determine the rate constant. b. What fraction of the initial N2O5 will remain after 13.0 h? c. What is the half-life? d. If the initial concentration of N2O5 was 0.222 M, then what concentration remain after 24 h?
The initial rate of a reaction 2A + 3B -> C + 2D was measured using different initial concentrations of A and B. Calculate the value of k
The temperature of Beaker X = 75°C and the temperature of Beaker Y = 50°C after Five minutes . determine the temperatures be after another 5 minutes have passed?
making ice cream involves surrounding the ice cream canister with a bath of salted ice water. to get the mix to freeze
A student made an acetic/acetate buffer by mixing 4.665 g of sodium acetate into 600.00 mL of a 0.0242 M acetic acid solution. What would the pH of the solution be as the result of the addition of 0.0050 mols of hydrochloric acid to the buffer
Bovine Serum Albunim (BSA) You need to make 100 ml of 2mg/ml BSA. Describe how you would dilute the stock solution to make this
a solution of acidic potassium permanganate is added to a solution of iron (II) sulfate Write an unbalanced net ionic equation
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