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Suppose you burn exactly 1.50g of benzoic acid, C6H5CO2H, in a combustion calorimeter and find that the temperature of the calorimeter increases from 22.50 to 31.69°C. The calorimeter contains 775 g of water, and the bomb has a heat capacity of 893 kJ/K. How much heat is evolved per mole of benzoic acid? Show all calculations
What is the atomic mass of a metal (M) if 4.50 g of MCl2 produces 4.34 g AgCl in the following reaction? MCl2 + 2 AgNO3 ? 2 AgCl + M(NO3)2
Arrange the molecules in order of decreasing boiling point Molecules are methane, dimethyl ether
What is the activation energy for the reaction shown below k=1.89x10^-8 /s at 540 K and 2.45 x 10^-7 at 601 K
a 255- flask contains pure helium at a pressure of 754 . a second flask with a volume of 470 contains pure argon at a
What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration.
Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
The density of so-called "heavy water"=1.1053 g/mL at 20 0C. determine what would be the mass of the flask when filled with heavy water?
2 mol of a compound is allowed to react in a foam coffee cup that contains 101 grams of water. the reaction caused the temperature of the water to rise from 21 to 24.7 C. What is the enthalpy of the reaction?Assume that no heat is lost to the surr..
Atmospheric pressure arises due to the force exerted by the air above the Earth. At higher altitudes, the mass of the air above the Earth is _______ than at sea level, and atmospheric pressure therefore _______with altitude.
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.
A sugar-water mixture contains 45.8 g of sugar and 108.5 g of water. What is the percent by mass of sugar and the percent by mass of water in the solution?
The Cl2 removed occupies a 10.0 L container at .500 atm at 25C. How many g of Ne are present in the original container?
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