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what mass of aluminum chloride will be produced if 22.6 grams of zinc chloride are used up in the reaction?
The neutrons from one treatment source have an average velocity of 3.4 x 10^7 m/s. If the velocities of the individual neutrons are known to within 2% of this value, what is the uncertainty in this position of one of them
Important information about Organic Oxygen Compounds, Can an ether molecule be made out of a methanol or ethanol molecule? Why or why not?
If the coal is burned in a power plant that uses 1900 tons of coal per day, what mass of calcium oxide is required daily to eliminate the sulfur dioxide?
A 496-mL sample of a gas at 263 oC is cooled at constant pressure until its volume becomes 241 mL. What is the new temperature in oC?
A Si wafer is treated in phosphorus vapor at 1000o C so that the phosphorus concentration at the surface is kept at the solubility limit of 1021/cm3.
Extraction procedures have shown that nitrogenase contains an iron-sulfur cluster, Fe4S4, where the atoms of each type are arranged alternatively at the corners of a cube.
A rock is found to contain 83.7% of the amount of uranium-238 that it contained when it was formed. (The amount that the rock contained when it was formed can be deduced from the presence of the decay products of u-238 .) How old is the rock?
Einstein reasoned that the absorbed photon must have the minimum energy required to dislodge an electron from the metal surface. This energy is called the work function () of that metal.
Sorbic acid is a weak monoprotic acid with Ka = 1.7x10-5. Its acid anion salt (potassium sorbate FW = 150 g/mole) is added to cheese to prevent mold. What is the pH of a solution that contains 4.93 g of potassium sorbate in 0.5 L of solution
what is the ph of a solution prepared by mixing 50.00 ml of 0.10 m methylamine ch3nh2 with 20.00 ml of 0.10 m
2noclg rarr 2nog cl2gat 450 k the rate constant is 15.4 atm-1s-1. how much time in s is needed for nocl originally at
The enthalpy change for the reaction below at 25oC is -1,850 kJ (per mole of C9H20). What is the internal energy change for the reaction at 25oC
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