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A coffee cup calorimeter contains 525.0 g of water at 25.0 oC. To it are added:
350.0 g of water at 48.3 oC 480.0 g of water at 63.8 oC
Assuming the heat absorbed by the styrofoam is negligible, calculate the expected final temperature. The specific heat of water is 4.184 J g-1 K-1.
To extract quinine from an aqueous solution, what pH should be used and why? I'm not sure if you use both pKa's or just one.
How many liters of the antifreeze ethylene glycol [CH2(OH)CH2(OH)] would you add to a car radiator containing 6.50 L of water if the coldest winter temperature in your area is -37°C
A 10-L drum of ether at 18C is open to the atmosphere (p=760 Torr) and contains 6-L of liquid. The top is sealed and the drum dented so that it now has an 8-L capacity.If the vapor pressure of the ether at 18C is 400 Torr, What is the pressure ins..
Na3PO4 + 3AgNO3 = Ag3PO4 + 3NaNO3 How many moles of AgNO3 would be required to react with 2.0 mol of Na3PO4.
A bottle contains 175 m: of insulin at a concentration of 20.0 mg/ml . What is the total mass of insulin in the bottle?
4 KO2 + 2 H2O + 4 CO2 4 KHCO3 + 3 O2 1.86 moles of O2 were produced.Now, How many molecules of O2 does this number of moles represent.
Write the acid/base equilibrium reaction (net-ionic) for the major species present in an aqueous solution of each of the following substances. Include aggregation states. Note that this text uses H3O+.
Suppose that a hotplate transfers 325KJ of energy to 450g of liquid water at 20C. What mass of the water would be boiled away
At a certain temperature, a volume of 100 mL of saturated barium carbonate solution contains 0.00216 g of BaCO3 (MW=197.3 g/mol).
Three manufacturers are producing carbonated bottled water. One company introduces carbonate by bubbling carbon dioxide into water until
what percentage of the acid is not ionized? (Assume all H in solution came from the ionization of HA.)
what is the percent relative error? Please explain by showing work. Are these measurements more precise or more accurate? What is the purpose of repetition in measurements?
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