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A 65 g ice cube at 0°C is heated until 40 g has become water at 100°C and 25 g has become steam at 100°C. How much energy was added to accomplish the transformation?
The potential energy associated with being a given height above the Earth%u2019s surface is mgh. Using this definition of potential energy, determine the ratio for the pressure at height h (Ph) to the pressure at height h = 0 (P0).
What is the pH of a solution formed after titrating 25 mL of 0.150 M acetic acid with 15.0 mL of 0.150 M sodium hydroxide? Ka(acetic acid)=1.76x10-5
Sulfur dioxide is made from the reaction of sulfur dioxide and oxygen: 2 SO2(g) + O2(g)to 2 SO3(g). What is the maximum volume of SO3 produced in a reaction of 1.91 g SO2 with 1.29 g O2? The SO3 gas is collected at STP conditions.
In a carbonate buffer at pH 7.3; what species of carbonate form the buffer, What are the relative amounts, and does the buffer have a greater capacity to neutralize added acid or added base explain all.
Calculate the pH after adding 0, 10.0, 25.0 and 30.0 mL of titrant in the titration of 50.0 mL of 0.100M NaOH with HCl 0.200 M.
Calorimeters and heat capacity, If 2.500 g of Mg is burned in a constant volume calorimeter with a heat capacity of 1.10 kJ/degrees Celsius containing 1.500 L
A liquid has a heat of vaporization of 30400 J/mol. At 271 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid
One enzyme under study in a is peptidylglycine alpha-amidating monooxygenase (PAM). The molecular weight of monomeric PAM is 75,000 g/mol and the enzyme contains 2 copper atoms/enzyme molecule.
how many kilojoules are needed to raise the temperature of 325 g of water from 15.0c to 77.0c? how many kilojoules are
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.700 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.89? Kb for ammonia is 1.8*10^-5. mass of NH4Cl
a gas mixture contains helium and oxygen at respective partial pressures of 255 torr and 0.450 atm. what is the total
assume that ethanol c2h5oh of 155 grams at the temperature of 25 degrees celsius nbspis mixed with 250 grams of
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