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1. A bowl of 464 g of water is placed in a microwave oven that puts out 776 watts (J/s). How long would it take in seconds to increase the temperature of the water from 12.0oC to 46.0oC? Use SF.
2. 247.0 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 16.7oC. After 347.6 g of an unknown compound at 88.9oC is added, the equilibrium T is 25.9oC. What is the specific heat of the unknown compound in J/(goC)?
3. A process takes place at constant pressure. The volume changes and the temperature increases by 65.3oC. The heat capacity of the system at constant volume, CV, is 471.3 kJ/oC. What is %u0394E in kJ? (Careful--pay attention to the units of the heat capacity.)
A gaseous reaction occurs at a constant pressure of 40.0 atm and releases 68.0 kJ of heat. Before the reaction, the volume of the system was 9.00 L. After the reaction, the volume of the system was 2.00 L.
Find the partial pressure and concentration of Nitrogen, Oxygen, and Carbon dioxide.
What will be the equilibrium concentration of [H2O] ? What will be the equilibrium concentration of [CO2]? What will be the equilibrium concentration of [H2]?
Determine the empirical and molecular formulas of Ibuprofen has 75.69% C, 8.80%H and 15.51%O by mass and has a molar mass about 206g/mol.
Consider a glass of 254 mL of water at 25°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved.
If 55.0 mL of ethanol {rm{(density}} = 0.789;{rm{g}}/{{rm{mL}}})) initially at 9.0^circ C is mixed with 55.0 mL of water {rm{(density}} = 1.0;{rm{g}}/{{rm{mL}}}) initially at 28.1^circ C in an insulated beaker, and assuming that no heat is lost, w..
10.00 mL of a solution containing 0.17 M NaCl and 0.23 M AlCl3 is introduced into a fully charged cation exchange column. How many moles of hydronium ions will be released by the column?
Limestone (CaCO3) is decomposed by heating quicklime (CaO) and carbon dioxide. Calculate how many grams of quicklime can be produced from 9.0 kg of limestone.
A body consists of a right circular cone whose base is 12 in. and whose altitude is 16 in. A hole 8 in. in diameter and 4 in. deep has been drilled from the base. The axis of the hole coincides with the axis of the cone. Locate the centroid of the..
If 358 mL of H2SO4 is neutralized with 60.0 mL of 1.50 M NaOH, what is the initial concentration of the acid?
Aluminum and oxygen react according to the following equation: 4 Al (s) + 3 O2 (g) → 2 Al2O3 (s) What mass of Al2O3, in grams, can be made by reacting 4.6 g Al with excess oxygen
Calculate the fraction of atoms in a sample of argon gas at 400K that have an energy of 10.0 KJ or greater.
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