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If 33mL of 1.20M HCL is added to 42mL of a solution containing excess sodium hydroxide in a coffee cup calorimeter. The solution temperature, initially at 25.0C, rises to 31.8C. Give a thermochemical equation, including? H as well as then give the Enthalpy change H, evolved per mole HCL.
For simplicity, Presume the heat capacity as well as density of final solution are those of water. Also presume that the total volume of the solution equals the sum of the volumes of HCL (aq) and NaOH (aq).)
Suppose that a compound "x" can be made from the reaction of two other compounds, "a" and "z". A. write a balanced equilibrium expression for this reaction
Write balanced ionic equation, net ionic equation, oxidation half reaction and reduction half reaction when liquid sodium chloride is electrolyzed.
In a particular solution, [Cr3+]=3.9x10-4 mol/L. What is the minimum pH at which Cr(OH)3(s) will precipitate from this solution. Assume the temperature is 25oC. For Cr(OH)3(s), Ksp=6.3x10-31 at 25oC. Give your answer with three digits
A sample of diatomic gas has a density of 0.002061g/ml at 1.8 atm pressure and 25.0°C. identify the gas
Choose the selection which gives the correct number of and bonds present in one molecule or ion of perchlorate ion, ClO4-. Make the central atom in your Lewis structure follow the octet rule if possible.
a student found that a maximum of 0.800g silver acetate is able to dissolve in 100.0ml of water. what is the molar
For every molecule of PM that is produced, one molecule of acrolein is formed. If acrolein is not used to cure cancer, what might happen to the acrolein?
A patient is given 0.055mg of technetium -99m, a radioactive isotope with a half-life of about 6.0 hours.
calculate the heat absorbed or lost by the aqueous solution qaq in joules assuming that the specific heat capacity
If the age of the Earth is 4.5 billion years and the half-life of 40K is 1.26 billion years, what percent of the Earth's original amount of 40K remains today
A molecule has the empirical formula C3H7 and has a density of 3.844g/L at STP. If one mole of this gas is burned completely in excess oxygen, how many moles of CO2 are produced
you are a professional frontier re-enactor who specializes in making lead shot. to do this you put 2 kg of ice into 2
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