- Does iron make acid or base when dissolved in water?

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A jar contains nickels and pennies. There's 56 coins in jar totaling $1.52. how many pennies are in jar? The sum of the 1st and 3rd terms of a geometric sequence is 120 and the sum of the 2nd and 4th terms is 360. What's the sum of first 7 terms? Why do we exclude triplen harmonics when we deal with Wye-connected? For 150 gm sample of phosphorus trichloride calculate the number of moles of PCl3 and Cl in the sample? Solvethis surd equation?

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