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A pure gold ring and pure silver ring have a total mass of 15.7 g. The two rings are heated to 65.3 degree celcius and dropped into a 13.3 mL of water at 21.2 degree celcius. When equilibrium is reached, the temperature of the water is 23.3 degree celcius.
What is the mass of gold ring? Assume a density of 0.988 g/mL for water
What is the mass of silver ring? Assume a density of 0.998 g/mL for water
the electron configuration [Kr]4d10 5s2? How many unpaired electrons are there in the ground state of this ion?
Calculate the resulting pH if 455 mL of 0.200 M HCl is mixed with 315 mL of 0.0850 M Ca(OH)2.
The photochemical reaction of 2,4-dimethylpentane with molecular chlorine affords a mixture of monochlorinated alkyl halides. Draw teh structures of these products and predict the molar ratio when the reaction is run at 25C
Over a wide temperature range, the reaction, M2O3(s) + C(s) ® M(s) + CO2(g), is spontaneous at low temperatures but non-spontaneous at high temperatures.
If 5.23 moles of an ideal gas has a pressure of 4.03 atm, and a volume of 72.61L, what is the temperature of the sample. (Please write out the formula used completely)
What is the starting temperature of 150ml of gas when cooled to 33 degree C and a volume of 120ml
Calculate the pH at the equivalence point for titrating 0.170 solutions of each of the following bases with 0.170 M HBr.
What is the percent yield of the Sodium borohydride reduction experiment if the final weight of the product is .668 grams, the melting point of the final product is138-141C and there is no participate in the final solution?
Calculate the mass of propylene glycol that must be added to .360 kg of water to reduce the vapor pressure by 2.87 torr at 40 degrees celsius (Ph20 at 40 degrees = 55.3)
Magnesium sulfate can be obtained at a drugstore as Epsom salts. The monohydrate is found as the mineral kieserite (MgSO4 * H2O, 138 g/mol).
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision
Compute the volume of the tank if the total pressure of the mixture is 44.08 psi at 86°F. What is the partial pressure of each constituent and the average molecular weight of the mixture
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