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A vessel originally contained 0.240 mol iodine monobromide (IBr), 0.0016 mol I2, and 0.0014 mol Br2.I2(g) + Br2(g) 2 IBr(g)
The equilibrium constant Kc for this reaction is 1.2 102 at 150°C. What is the direction (forward or reverse) needed to attain equilibrium at 150°C?
after 42 days a 2.0 g sample of phosphorus 32 contain only 0.25 g of the isotopt. what is the half life of the
Calculate the heat needed at 0 degrees celsius to make each of the following changes of state. kilocalories to freeze 285 of water.
A buffer is prepared by dissolving 52.203g of HNO2 and 65.552g Mg(NO2)2 into water forming 2.5 L of solution. What is the pH of the buffer. keep in mind: Mg(NO2)2 (s)--------->H30+ (aq) +NO2- (aq)
given that the mass ratio of na sodium to f fluorine in sodium fluoridenaf is 1.211. determine how much fluorine was
add the angular wave function for a 2s electron of carbon to that of a 2py electron of the same carbon atom. subtract
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of Br- is doubled? Just put in the number as a whole number or fraction.
What is the half life of this reaction if the initial concentration is 1.40 M. b) Given this same starting concentration, calculate the concentration after 3 minutes. c) How long would it take for the starting concentration to reduce to 0.50 M?
What is the intact compound equation and the net ionic equation for the neutralization of aqueous hydrofluoric acid by aqueous calcium hudroxide?
Usually t-butanol absorbs water on exposure to the air. If the freezing point of a 10.0 g sample of t-butanol is measured as 24.59 degrees C, how many grams of water are present in the sample
determine the theatrical yield if 1.56 grams of hydrogen is permitted to combines with 9.70 grams of nitrogen producing
that the reaction was endothermic. If the enthalpy of reaction is negative, then we say that energy was released or that the reaction was exothermic. Most chemical reactions are exothermic.
A calibrated flask was filled to the 25.00 {\rm mL} mark with ethyl alcohol. By weighing the flask before and after adding the alcohol, it was determined that the flask contained 19.7325 {\rm g} of alcohol
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