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The ideal gas law may be expressed as: PV = nRT, where the gas constant, R = 8.314 kPa L mol-1 K-1. Calculate the volumein litres of a party balloon filled with 0.49 mol of helium to a pressure of 120 kPa on a cold morning of 5 ºC.
(Give your answer to at least TWO significant figures and do not include the units in the answer box)
predict the products of the reaction of acetophenone with 1) NaBH4 then H3O+ 2)aqueous acidic CrO3 3)NH2OH 4)CH3MgBr, then H3O+ 5) CH3OH, H+ catalyst
When 50 mL of water contains 0.50 moles HCl at 22.5 degrees celsius is added to 50.0mL of water containing 0.50 mol NaOH at 22.5 degrees celsius in a calorimeter, the temperature of the solution increases to 26.0 degrees celsius.
Calculate the amount (in grams) of N-methylmaleimide and 9-(hydroxymethyl)anthracene that are required in a reaction utilizing 0.5mmol 9-(hydroxymethyl)anthracene (208.26 g/mol) and 3 molar equivalents of N-methylmaleimide (111 g/mol)
Sulfur dioxide (SO2) can be reduced by hydrogen disulfide (H2S), producing sulfur in its elemental form and water (H2O). Using Hess's law and the reactions below, determine the overall enthalpy for the reaction between SO2 and H2S. Make to clearly s..
CCl4 lowered the freezing point of the solvent by 5.40 K . Calculate the molar mass of the compound.
Calculate the molar mass of Phosphorus pentafluoride. Calculate the root mean square speed of Phosphorus pentafluoride molecules at 85.0C
What was the volume of the gas when the temp was changed to 50.0C and the new pressure was 760.0 torr.
Give an example of a biological reaction in which water participates as a reactant and a reaction in which it participates as a product.
The solution was acidified and treated with thioacetamide until no further change occurred. Calculate the Cu2+ and Fe2+ concentrations in the resulting solution. Ksp CuS=8.5x10^-36, Ksp FeS=3.7x10^-19
Write down a balanced chemical equation for polymerization of a w-hydroxy carboxylic acid (HORCO2H)
Eventually, the amounts of the three species do not change further; the system has reached equilibrium. (at this point, approximately 22% of the HI has decomposed.) Describe what is happening in this system at the molecular level.
Calculate the pH after the addition of the following volumes: - Show all your calculations. no credit will be given without showing the details
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