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How many moles of magnesium ion are present in 5.25g Mg3(PO4)2?
Problem- Write the ion product expression at equilibrium for each compound: (a) calcium sulfate. (b) chromium(III) carbonate (c) magnesium hydroxide (d) arsenic sulfide
You turn on a light bulb that emits only pure violet light (400.00 nm). You leave the light on for 60.0 seconds, and 1000. Joules of energy worth of light is emitted. How many photons were emitted by the light bulb during this 60 second period
Suppose that 0.48 g of water at 25 °C condenses on the surface of a 55-g block of aluminum that is initially at 25 °C.
For the reaction PCl5 PCl3 + Cl2, Kc= 33.7. Calculate the reaction quotient Q to determine which direction the reaction will shift toward when 0.00650 M PCl5, 1.04 M PCl3 and 0.0500 M Cl2 are mixed together in a 1.0 L flask
The Orsat analysis of the flue-gas gives 13.9% CO2, 0.8% CO, 4.3% O2, and 81.0% N2. Calculate the percent of excess air based on complete combustion of the coke.
At a certain temperature the following reactions have the constants shown. Calculate the equilibrium constant Keq for the following reaction at that temperature.
The problem is about a solution in second order that the original [A]o = 0.100M. 20% of the reaction is completed in 40 minutes. What is the rate constant? What is the half-life?
Standard addition: Lithium in the blood serum of a manic-depressive patient treated with lithium carbonate is determined by flame emission spectrophotometry using a standard additions calibration.
Milk will sour in about eight hours at 21*C (70*F = room temperature). How long will raw milk last in a refrigerator maintained at 5*C? Assume the rate constant to be inversely related to souring time.
Whats a dissociation equation and calculate the concentrations of all ions present when 100.0 g of Na2 OOCCOO^sh is dissolved to make 5.0 L of solution.
how much heat must be added to 36.2g sample of iron to increase its temperature by 250.0 degree C.
Assume also that on a yearly basis the lake is completely mixed, and that the small river flowing into and out of the lake can be neglected as far as acidification is concerned. How many years will it be before the lake will reach a pH of 5.0?
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