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A mixture of KBr and K2S of mass 15.7 g contains 8.36 g of potassium. What is the percent by mass of KBr in the mixture?
Radioactive radon gas (222Rn) enters an average building at a rate of 5 picocuries per second per square meter of foundation area. Consider a house with a foundation of 400 square meters and a volume of 1000 cubic meters.
If 8.40 kJ of heat is needed to raise the temperature of a sample of metal from 15 degrees celsius to 20 degrees celsius, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 25 degrees celsius to ..
43 kg person drinks 410. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 18% of the energy in milk is converted to mechanical work.
What is the value of Ksp for Ag2SO4 if 5.40 g is soluble in 1.00 L of water?
A mixture of H2 and NH3 has a volume of 142.0cm3 at 0.00?C and 1.00 atm. The mixture is cooled to the temperature of liquid nitrogen at which ammonia freezes out and the remaining gas is removed from the vessel. Upon warming the vessel to 0.00?C a..
The equilibrium concentration of I2 is 0.0900M. What is the equilibrium constant, Kc , for the reaction at this temperature?
PbCl2 has a Ksp of (1.7 x 10^-5) while it dissolves it has an ionic strength that interferes with itself. Using activity, iterations along with approximations, compute the number of grams of PbCl2(s) that dissolves in 750 Ml of H20.
A 2.88 g lead weight, initially at 10.6 C, is submerged in 7.68 g of water at 52.0 C in an insulated container. What is the final temperature of both substances at thermal equilibrium
Predict and explain what is expected to occur to the enzyme (one-word term) and activity of the enzyme when treated with urea or guanidine.
A 32.0-g sample of water at 290. K is mixed with 48.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
In temperature dependance of reaction rates, if you use R=8.314 J/molxK, what should the units be for Ea in the absence of conversions
Initially, a mixing tank has fluid flowing in at a steady rate w1 and temperature T1. The level remains constant and the exit temperature is T2 = T1.
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