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If 975g of copper is heated from 20 degrees C to 80 degrees C what amount of heat is absorbed?
What is the pH of a 0.15M solution of HCOOH formic acid if the Ka of formic acid HCOOH is 1.8x10^-4 at 25 degrees Celsius.?
Give the structure of the phosphorus ylide and carbonyl compound you might use to prepare the following alkenes
How much heat is required to convert 27.0 grams of ethanol at 28 degrees celcius to the vapor phase at 78 degrees celcius?
.914g sample of stannous flouride gives a 1,078g precipitate of stannous phosphate. calculate the theoretcial yeild?
how many moles of HNO3 are present in 33.0 mL of a 4.70M solution ?
A solution containing 16.9 g of nonvolatile molecular compound in 250. g of water has a freezing point of -0.744°C. What is the molar mass of the substance?
What percentage of the original Ag+ remains in solution when 180 mL 2.10×10-2 M AgNO3 is added to 240 mL 3.76×10-2 M K2CrO4 ?
What is the maximum number of liters of Fe2O3(s) that can be made from 11.53 L of O2(g) and 16.07 L of FeS(s) at STP?
Determine delta H of this reaction (kJ/mol H 2 SO 4 ) - When 24.4 mL of 0.500M sulphuric acid ,H 2 SO 4 is combined to 24.4ml of 1.00M potassium hydroxide KOH in a coffee cup calorimeter
Consider the following combustion reaction: 2C4H10 + 13O2 -> 8O2 + 10H20. 125 g of C4H2O react with 415g O2.
Propane gas (C3H8) is used as a fuel in rural areas. How many liters of C02are formed at STP by the complete combustion of the propane in a container with a volume of 15.0 L
determine the concentration of O3 in air sample (in ppm)If 10,000 Litres of air bubbled through iodide solution and back titrated with 19.4 mL of a 1.2x10-4 M Sodium thiosulfate, also spelled sodium thiosulphate solution to reach equivalence,?
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