Need to do this problems
7. Calculate the % per mass of Na2S04 in a solution containing 14.7g of Na2SO4 345g of water. 8. Calculate the molar fraction of methanol, CH3OH in the following solutions: a) 7.5g CH3OH in 245g of water. b) 55.7g CH3OH in 164g of water.
14. When 10.0 grams of Na2S04 is dissolved to 500. mL with water: c. What is the molarity of sodium sulfate? d. What is the molarity of sodium ion in the solution? e. What is the molarity of sulfate ion in the solution? 15. You want to perform a chemical reaction and you need 15.0 grams of silver for the reaction to produce the desired yield of product. How much of a 0.75 M silver nitrate solution will you need...
Exercises (Mass Percent) 1. 3.0 grams of sugar are dissolved in 150 g of water What is the mass percent of sugar in the solution? 2. A 200-gram solution of alcohol contains 180 mL of water. What is the mass percent of alcohol? (Remember water's density.) 3. How many grams of NaBr are needed to make 50 g of a 5.0% solution? 4. How many grams of LiOH are needed to make 25 g of a 4.0% solution? 5. What...
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7) What is the percent concentration of a solution containing 18 g of NaCl (salt) in 150 ml water?
What is the percent by mass of water in iron(II) sulfate heptahydrate, FeSO_4 7H_2O (or what percent of the molar mass of FeSO_4 7H_2O is due to the waters of crystallization)?
7. What is the mass percent of sodium acetate in a solution prepared by dissolving 25.0 g of sodium acetate in 150.0 g of water? A. 0.167 % B. 83.3% C. 16.7 % D. 0.143 % E. 14.3 %
19,915g 7. Calculate the theoretical percent water in the hydrate. [10 pts.] Note: The theoretical formula for the hydrate is MgSO4.7H20 [periodic table includes significant figures] 1900 FO
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What is the expected freezing point of a 1.50 m solution of Na2S04 in water? Kf for water is 1.86°Cm A)-19°C 6-8.4°C C) -6.5°C D)-0.93°C
2. What is the percent water in Na SO 7H O?
What is the percent by mass of water in iron (II) sulfate heptahydrate, FeSO4*7H2O (or what percent of the molar mass of FeSO4*7H2O is due to the waters of crystallization? Please include work so I can understand thanks.