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When 0.767 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 125C is observed.Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC.
The molar heat of reaction, H rxn, for the reaction of Ca(s) + 2H+(aq) Ca2+(aq) + H2(g)
CH4 + 2 O2-> CO2 + 2 H2O How many grams of CO2 are formed from the combustion of 9.00 moles of methane, CH4, in oxygen?
A foul-smelling gas produced by the reaction of with was collected, and a 1.00 sample was found to have a mass of 1.52 at STP. What would be the formula.
If the O2 gas present in 7.30 L at STP is changed to a temperature of 17 degrees Celsius and a pressure of 788 Torr, what will be the new volume?
A 130 mL stock solution contains 1.3 M Na3PO4. When 10 mL of the stock solution is diluted to 21 mL, what will the concentration of Na+ ions be?
What is the pH of this buffer after 0.45 mL of 10.0 M hydrochloric acid are added to it? The Ka for HF is 6.8 x 10-4.
There are two common polymorphs of zinc sulfide: cubic and hexagonal. Based on the analysis of Madelung constants alone, predict which polymorph should be more stable.
explain how to correct for the partial pressure of water vapor when calculating the partial pressure of a dry gas that is collected over water.
Calculate Q when the solutions are mixed (time zero). Indicate how the reagent concentrations will changes as the reaction proceeds.
Celsius and heated to the temperature of 275 degree Celsius at a constant pressure of 0.975 atm. compute the work done?
Determine the molarity of a solution formed by dissolving 15.79 grams of CaCl 2 , calcium chloride in 200.grams of H 2 O, water?
When one mole of benzene (C6H6) undergoes complete combustion, 3,170 kJ are released. Calculate the combustion energy of 0.350 kg of benzene?
When measuring horse radish peroxidase you found that a purified preparation has a specific activity of 10mmolar/sec/mg protein. suppose you added to an assay a competitive inhibitor that would not produce a colored product.
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