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How many moles of Ca(NO3)2 are there in 75 mL of 0.25 M solution? Can someone explain to me how to do this? If the Ka of the conjugate acid is 7.93*10^-4 what is the pKb for the base? R-12 EVALUATE IF R =-3? Do jellyfish get gas from eating jellybeans? What is the equation of the line with an x-intercept of -1 and a y-intercept of 2?