1. If 155 g of CuSO4 is dissolved in enough water to make 2.25 L of solution, what is the molarity of the solution? 2. What mass (in grams) of NH4Cl is needed to prepare 250 mL of a 0.35 M ammonium chloride solution?

3. What is the volume needed to have a 2.11 M Solution of CaBr2 in water if you are dissolving 172.0 g of CaBr2?

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nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

i do not get it   at all

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.