Calculate energy released when a piece of copper is cooled
Calculate the energy released when a 28.9 gram piece of copper is cooled from its melting point of 1083 degrees C to 25.0 degrees C. The specific heat of copper is .385 J/g degrees C.
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If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry.
When the mixture was analyzed by combustion analysis, 21.999 mg of CO2 (FM 44.010) was produced. Find the weight percent of oxirane in the mixture.
A 100.0-mL sample of spring water was treated to convert any iron present to Fe2+. Addition of 25.00 mL of 0.002107 M K2Cr2O7 resulted in the reaction: 6 Fe2+ + Cr2O72- + 14 H+ ---> 6 Fe3+ + 2 Cr3+ + 7 H2O. The excess K2Cr2O7 was back-titrated
A 952 cm3 container of gas is exerting a pressure of 108 kPa while at a temperature of 48 oC. Calculate the pressure of this same amount of gas in a 1236 cm3 container at a temperature of 64 oC
The following reaction has achieved equilibrium. Predict the effect on the formation of phosphorous pentachloride (increase, decrease or no effect) for the stated changes to the system:
Silver chloride often used in silver plating contains 75.27% Ag. Calculate the mass of silver chloride in grams required to make 4.0 g of silver plating.
What is the minimum concentration of {rm{OH}}^ - required to dissolve 2.0×10-2 mol of {rm{Zn(OH)}}_2 in a liter of solution?
Linuron or 1-Methoxy-1-methyl-3-(3,4-dichlorophenyl)urea, is a biologically active compound of commercial importance. Write down the chemical structure of linuron.
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