- What is the pH of a 0.45 M (CH3)3N solution? Kb = 6.40 ✕ 10-5.?

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Prove the following assertions involving arbitrary sets A, B, C: (a) A × (B ∩ C) = (A × B) ∩ (A × C) (b) (A ∪ B) × C = (A × C) ∪ (B × C)? A sandbox shaped like a right rectangular prism is 0.45 h,2 w, and 2.6 l.The sand in the box is 0.25m deep,what volume of sand is in the box? Would space Aliens go to the trouble to send ships here to make sure we humans are all dead? Talking about DNA recombination, what is fork regression? When is it used? Why is it 70 degrees in winter ?

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