Find the concentration of chloride ions in a solution that is 0.110 m in sodium chloride (nacl) and 0.11 m in magnesium chloride (mgcl2).

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The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. what is the atomic mass of sodium?

You need to make a stock solution of a known copper concentration for your experiment. You start by weighing out a piece of pure copper wire which has a mass of 0.211 g. You then add 1.0 mL of 12 M HNO3, 3.0 mL of H2O and 2.

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