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14. A chemist wants to make Co(OH)2 according to the following reaction: CoCl2 (aq) + 2NaOH (aq) → Co(OH)2 (s) + 2NaCl (aq) If the student uses 167.4 mL of a 1.39 M solution of NaOH and an excess of CoCl2, how many grams of Co(OH)2 will be formed?
15. A chemist wants to make 150.0 grams of BaCO3 using the following reaction: Ba(NO3)2 (aq) + K2CO3 (aq) → BaCO3 (s) + 2KNO3 (aq) If she has an excess of K2CO3, what volume of a 2.56 M solution of Ba(NO3)2 will she need to use?
16. Of the two concentration units you learned in this chapter, which is more like a ratio of the amount of solute to the amount of solvent?
17. You make a solution by mixing 67.8 grams of KCl with 450.0 grams of water. What is the molality of the solution?
18. A chemist makes a 2.34 m solution by mixing 23.1 g of MgCl2 with water. How many kilograms of water were used?
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Chemistry, 21.06.2019 15:30
Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl
Answers: 2
Chemistry, 22.06.2019 11:30
For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with ph. if the solubility does change, pick the ph at which you'd expect the highest solubility. you'll find ksp data in the aleks data tab. compounds does solubility change with ph
Answers: 3
Chemistry, 22.06.2019 12:00
Which of the following units is not an official si unit? mole liter kilogram ampere
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14. A chemist wants to make Co(OH)2 according to the fol...
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