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CHEM QUESTION: The constant of a reaction is 0.025 M-1 s-1. If [A]0=8.00 M what is the concentration of A after 25 seconds? please show work? A new challenge? What is the solution set of the equation 2x^3 - 5x^2 - 4x + 3 = 0? You roll a die twice, what is the probability of you rolling a 1 then a 3 (round your answer to 2 decimal places)? Please help!? Enthalpy change for the first reaction?
P4 + 6Cl2 → 4PCl3 ΔH = P4 + 10Cl2(g) → 4PCl5(s) ΔH = -1,777.5
PCl3(l) + Cl2 → PCl5(s) ΔH = -127.2?