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1. Find the percent by mass in which 41.0 g of NaCl is dissolved in 331 grams of water.

1. Find the percent by mass in which 41.0 g of NaCl is dissolved in 331 grams of water.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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1. Find the percent by mass in which 41.0 g of NaCl is dissolved in 331 grams of water. 2. Alcohol-based hand sanitizers clean hands by killing many types of disease- causing bacteria and viruses. How many mL of ethanol are contained in an 8.0- oz bottle of hand sanitizer that has a concentration of 62% (v/v) of ethanol? Note that (1 fl-oz = 29.6 mL). 3. If 28.5 g of calcium hydroxide in Ca(OH)2 is dissolved in enough water to make 185 g of solution, what is the percent by mass of Ca(OH)2 in the solution? 4. A wine contains 12% alcohol by volume. Calculate the volume (in mL) in 350 ml of wine. alcohol 5. A 50 ml of 12% by mass-volume was used in an experiment. How many grams of solute does the solution contain? 6. Calculate the mole fraction of sulfuric acid H2SO4 in 8% (w/w) aqueous H2SO4 solution. 7. Calculate the mole fraction of each component of a solution containing 65 g of ethanol C 2H ,0 in 350 g of water. 8. 24.0g of NaCl is dissolved in enough water to make .750 L of solution. a. What is the molarity (M) of the solution? b. How many moles of NaCI are contained in 0.0100 L of the above NaCI solution? c. What volume (L) of this NaCI solution would contain 0.200 moles of NaCl? 9. Ammonia (NH3) and phosphoric acid solutions (H3PO4) are used to produce ammonium hydrogen phosphate (NH4)2HPO4 fertilizer. What volume of 15.0 M NH3(ag) is needed to react with 1000 L of 13.5 M of H3PO4(aq)? 10. In an experiment, .01000 L sample of sulfuric acid solution reacts completely with 0.0160 L of 0.150 M potassium hydroxide. Calculate the concentration of the sulfuric acid. Do not forget to balance the equation first. H2SO4(ag) + KOH(aq) → H2O) + K2SO4(aq)
Transcribed Image Text:1. Find the percent by mass in which 41.0 g of NaCl is dissolved in 331 grams of water. 2. Alcohol-based hand sanitizers clean hands by killing many types of disease- causing bacteria and viruses. How many mL of ethanol are contained in an 8.0- oz bottle of hand sanitizer that has a concentration of 62% (v/v) of ethanol? Note that (1 fl-oz = 29.6 mL). 3. If 28.5 g of calcium hydroxide in Ca(OH)2 is dissolved in enough water to make 185 g of solution, what is the percent by mass of Ca(OH)2 in the solution? 4. A wine contains 12% alcohol by volume. Calculate the volume (in mL) in 350 ml of wine. alcohol 5. A 50 ml of 12% by mass-volume was used in an experiment. How many grams of solute does the solution contain? 6. Calculate the mole fraction of sulfuric acid H2SO4 in 8% (w/w) aqueous H2SO4 solution. 7. Calculate the mole fraction of each component of a solution containing 65 g of ethanol C 2H ,0 in 350 g of water. 8. 24.0g of NaCl is dissolved in enough water to make .750 L of solution. a. What is the molarity (M) of the solution? b. How many moles of NaCI are contained in 0.0100 L of the above NaCI solution? c. What volume (L) of this NaCI solution would contain 0.200 moles of NaCl? 9. Ammonia (NH3) and phosphoric acid solutions (H3PO4) are used to produce ammonium hydrogen phosphate (NH4)2HPO4 fertilizer. What volume of 15.0 M NH3(ag) is needed to react with 1000 L of 13.5 M of H3PO4(aq)? 10. In an experiment, .01000 L sample of sulfuric acid solution reacts completely with 0.0160 L of 0.150 M potassium hydroxide. Calculate the concentration of the sulfuric acid. Do not forget to balance the equation first. H2SO4(ag) + KOH(aq) → H2O) + K2SO4(aq)
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