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Potassium metal reacts violently when added to water according to the balanced equation: 2K(s) + 2 H2O (I) > 2KOH(aq) + H2(g). How many moles of H2O are needed to react completely with 7.54 mol of K
Based on your observations, what might have happened if you had not followed these instructions? Might this also have affected your percent yield? Explain.
Compute the change in temperature when 1.8 g of sodium chloride is dissolved in 300.0 mL of water initially at 20C. The heat capacity of water is 4.184 J/mL/K.
portion of the stock solution and dilute it to a total volume of 0.550L what will be the concentration of the final solution?
Show the electron configuration of phosphorus, P . Be sure to arrange the subshells in order of energy, with the lowest-energy subshell at the bottom and the highest-energy subshell at the top.
sulfuric acid h2so4 is produced from water vapor sulfur dioxide and oxygen gas. write a balanced equation then
the leathal inhalation does of sarin for a 200 pound person has been determined to be .0015mg. determine the ld50 of
Ka for this species is 10-4 and Kb is 10-8. Nonetheless, the Ka and Kb reactions proceed to nearly the same extent when NaHA is dissolved in water.
What is the mass of platinum required to solidify all the gold? What is the change in entropy of the system? Cp(Pt, s) = 25.86J/mol*K ?H?fus(Au, s l) = 12550J/mol
draw the lewis structures and determine which of these molecules has a central atom that violates the octet rule.
A 70.0 silver object and a 40.0 gold object are both added to 45.5 of water contained in a graduated cylinder. What is the new water level in the cylinder?
Given the following data (?Hf, S°, respectively) for N2O4(l) -20. kJ/mol, 209.0 J/K mol, and N2O4(g) 10. kJ/mol, 303.7 J/K mol. At what temperature (in °C) does the vaporization of N2O4 liquid become spontaneous
Rate of reaction for 8H2S +4O2 -> 8H2O + S8, if started with 21.35g of H2S and 15.36g of O2. What is the limiting reactant and how much S8 can be produced.
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