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Two samples of copper and lead both weighing 1.500g each recive equal amounts of heat. The temp. of copper increased from 25.0 degrees celcius to 30.0 degreees celcius.
If the initial temp. of the lead was 25.0 degrees celcius, what's the fianl temp. of the lead?
determine the binding energy of an F-19 nucleus. the F-19 nucleus has a mass of 18.99849325 amu. a proton has a mass of 1.00728 amu and neutron has a mass of
It requires 41.16mL of a particular NaOH solution to bring 1.0054 g of KHP (204.24 g/mol) to the bromocresol green endpoint. a 0.8054 g sample of an unkown monoprotic acid requires 44.30 ml of the same solution to reach the same endpoint. what is ..
Uric acid dissociates as shown in the figure at the right with a pKa of 5.80, and can be treated as a simple monoprotic acid in this pH range. Its solubility in urine depends on the relative amount of protonated and unprotonated forms. A urine sam..
Calculate the final volume of a 0.500 L gas container that increased in temperature from twenty six degree Celsius to sixty degree celsius while the pressure increased from 760 torr to 1170 torr?
a balloon is filled to a volume of 7.00x102 ml at a temperature of 20.0 degrees c. the balloon is then cooled at
The half-life of tritium (31H) is 12.3 years. If 55.0 mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the nuclide will remain after 49.2 years?
We add R12 to the tank until the final mass of R12 inside the tank is 80 kg. If the temperature remains constant, what is the volume occupied by the liquid in the final state. How much mass of R12 was added to the tank
The weak acid HZ has a ka of 2.55*10^-4. What is the pH of a .075 M HZ? What is the pOH of .045 M HZ?
The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are..
Why does tellurium have an endothermic electron affinity. In other words, why would it take energy to add an electron to it
When 350.0 mL of 0.45 M benzoic acid is titrated with 0.15 M NaOH, what is the pH of the solution after 200.0 mL of base has been added? The pKa for benzoic acid is 4.19
How many mL of each of 0.10 M lactic acid solution and 0.10 M NaOH solution are needed to make 800 mL of a buffer of pH 3.50?
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