What is the main reason why increasing the temperature speeds up a chemical reac

Question

What is the main reason why increasing the temperature speeds up a chemical reaction? Increasing the temperature raises the energy of activation (E_2). Increasing the temperature gives more of the molecules enough energy to react. Increasing the temperature gives more of the molecules the correct orientation for reacting, Increasing the temperature increases the concentration of reactant molecules. Increasing the temperature lowers the energy of activation (E_2). what is the charge of Pt in the complex [PtBr_2(CO_3)_2]^2? 0 +6 ?2 +2 +4

Explanation / Answer

17)
increasing temperature increases number of molecules having energy greater than activation energy
Answer: b

18)
charge on Pt + 2*charge on Br + 2*charge on CO3 = -2
charge on Pt + 2*(-1) + 2*(-2) = -2
charge on Pt - 2 -4 = -2
charge on Pt = 4
Answer: e

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