51. The major reason an increase in temperature causes an increase in reaction rate is that (A) the activation energy changes with temperature (B) the fraction of high energy molecules increases (C) molecules collide with greater frequency (D) catalysts become more effective 52. Catalysts effectively increase reaction rate by (A) increasing the Keq (B) increasing the concentration of the reactant (C) decreasing the concentration of the products (D) lowering the activation energy requirements

Find the pH of a 0.40 M solution of the acid (K₁ = 3.3 x 10-6) if the solution is also 0.35 M in [A-]. pH = Submit Submit Answer Show Tutor Steps Retry Entire Group 9 more group attempts remaining

i need the answer quickly

Interaction between two protons ?

where does the 2mL come from?

pH pOH [H*] [OH'] acid or 2.41 10-6 gs for all answers) US VI 11:41 Cbp esc #3 24 & back

Redox Reactions in Basic Aqueous Solution (two parts) Balance the following equations, using either the half-reaction method or the oxidation number method, and enter the coefficients in the boxes. The coefficients must be the smallest possible integers. All boxes must contain an entry. Si + Sn(OH),2 - H20 – H20 + ОН + SiO3 HSNO2 + OH Note that neither H,0 nor OH" should appear on more than one side of the equation. Thus, some of the coefficients above must be 0.

How should number 2 be solved

Highest Ką value Ka Lowest Ką value Ka Answer Bank CICH₂CH₂COOH CICH, COOH Cl₂ CHCOOH CH₂CH₂COOH 2

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