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

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Can you explain why √[(1 - √3)²] = √3 - 1 not 1 - √3 ? Whats double of 500? Arrange the following elements from greatest to least tendency to accept an electron Br Ge Se Ca K
Help! I don't undrstand the exceptions? For the curve given by
r(t)=⟨sin(t)−tcos(t),cos(t)+tsin(t),1t^2+5⟩
a. Find T(t)~the Unit tangent
b. N(t)~the unit normal
c. k(t)~curvature? Given the following reaction:
C3H8+ 5O2= 3CO2+ 4H2O
determine the number of moles of carbon dioxide produced
need setup/formula thanks!!!!?