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If the theoretical yield of a reaction is 0.123 g and the actual yield is 0.121 g, what is the percent yield?
calculate the molar mass of a vapor that has a density of 7.535 gl at 14degc and 743
at constant external pressure 1.2atm the temperature of 3.25 mol of ideal gas increased from 250k to 305k.calculate the
Copper dissolved in nitric acid, producing copper (II) nitrate. After reaction with sodium hydroxide an heating, copper nitrate changed to copper(II) oxide. Calculate the percent yield of this process if 1.025g of copper produced 1.025 g of copper..
Calculate the amount of heat transferred when 45.0 g of CH3OH(g) is decomposed by this reaction at constant pressure.
A 370. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 49°C.
An aqueous NaCl solutions is made using 112 g of NaCl diluted to a total solution volume of 1.0 L. Calculate the molarity, molality and mass percent of the solution
An automobile gasoline tank holds 21 of gasoline. When the gasoline burns, 84 of oxygen is consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced?
When an experiment to determine the molar mass of a volatile liquid is performed, it is found that a 342 mL flask at 22.0C and 1.00 atm is filled by .423 g of vapor. which of the following volaite liquids is it?
Unfold the enzyme with urea and 2-mercaptoethanol. Then incubate and crystallize it in the presence of the substrate followed by X-ray crystallography.
The initial concentrations of the three gases are 0.550 M H2S, .550 M H2, and .275 M S2. Determine the equilibrium concentrations of the gases.
A 22.0 mL sample of vinegar, which is an aqueous solution of acetic acid, HC2H3O2 , requires 24.5 mL of 0.450 M NaOH to reach the endpoint in a titration. What is the molarity of the acetic acid solution
Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3). How much limestone (in kg) is required to completely neutralize a 4.3 billion liter lake with a pH of 5.5?
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