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If Magnesium sulfate is a hydrate with the formula MgSo4**H2O 1.65grams out of a 3.38 gram sample of the pure hydrate remain after heating. Explain the formula of the hydrate?
The amount of nut burned was 0.9905g. How many of these nuts would a 64kg person have to eat to obtain enough energy to bike (racing)for 30min. The amount of bicycling (racing) is 0.127
Give at least 3 reasons why sulfonylamide diuretics such as 'Furosemide' do not possess antibiotic activity?
two compounds with partition coefficients of 15 and 18 are to beseparated on a column with vmvs 3.0 andtm1 min.
calculate the volume of water needed to dilute the anti-freeze from 0.20M in 0.260 litres to 0.13M.
determine the temperature at which the reaction will become spontaneous. See the section on Free Energy and spontaneity in our book. You will also find Appendix C very helpful as well. The delta H for the reaction is 90.84 kiloJoules/mol
How long would it take for 1.50 mol of water at 100.0 0C to be converted completely into steam if heat were added at a constant rate of 19.0 J/s?
calculate the ph during the titration of 100.00 ml of 0.200 m hno3 with 0.400 m koh after 0 25.00 50.00 and 75.00 ml of
In the combustion of propane for energy, how many kilojoules of heat are produced when 2 kilograms of propane are completely combusted in the presence of excess oxygen
determine the mass of silver phosphate formed when 4.33 g of silver nitrate is reacted with 22.7 mL of .118 M K3PO4 ?
The drug amphetamine, C6H5CH2CH(CH3)NH2, Kb = 7.8 multiplied by 10-4, is usually marketed as the hydrogen bromide salt, C6H5CH2CH(CH3)NH3+Br
How many grams of dry NH_4Cl need to be added to 1.60 L of a 0.700 it M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.62? K_b for ammonia is 1.8 * 10^{-5}.
A 245 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
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