Can someone help me to answer this correctly, please, and explain it. Please answer these 3 short questions, I don't have more money to buy more questions. These 3 questions are different.

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A sample of an industrial waste water is analyzed and found to contain 24.9ppbZnn+. How many grams of zinc could be recovered from 1.73103kg of this waste water? grams Zn An aqueous solution of aluminum chloride has a concentration of 0.424 molal. The percent by mass of aluminum chloride in the solution is % An aqueous solution is 10.0% by mass hydrochloric acid, HCl, and has a density of 1.05g/mL. The molality of hydrochloric acid in the solution is m