1. Calculate the percent by mass of chromium in each of the following oxides: (a) CrO3 (b) Cr₂O3 2. A commercial mouthwash contains 4.3 g of ethanol and 0.021g antiseptic in each 30.-mL portion. Calculate the w/v percent concentration of each component. 3. How many mL of ethanol are contained in a 30.-mL portion of mouthwash that has 8.0% (v/v) of ethanol? 4. A cough medicine contains 0.20% (w/v) dextromethorphan, a cough suppressant, and 2.0% (w/v) guaifenesin, an expectorant. How many mg of each drug would you obtain from 3.0 tsp of cough syrup? (1 tsp = 5 ml)
1. Calculate the percent by mass of chromium in each of the following oxides: (a) CrO3 (b) Cr₂O3 2. A commercial mouthwash contains 4.3 g of ethanol and 0.021g antiseptic in each 30.-mL portion. Calculate the w/v percent concentration of each component. 3. How many mL of ethanol are contained in a 30.-mL portion of mouthwash that has 8.0% (v/v) of ethanol? 4. A cough medicine contains 0.20% (w/v) dextromethorphan, a cough suppressant, and 2.0% (w/v) guaifenesin, an expectorant. How many mg of each drug would you obtain from 3.0 tsp of cough syrup? (1 tsp = 5 ml)
Chemistry
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Chapter1: Chemical Foundations
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![1. Calculate the percent by mass of chromium in each of the following oxides: (a) CrO3 (b) Cr₂O3
2. A commercial mouthwash contains 4.3 g of ethanol and 0.021g antiseptic in each 30.-mL portion. Calculate the w/v percent
concentration of each component.
3. How many mL of ethanol are contained in a 30.-mL portion of mouthwash that has 8.0% (v/v) of ethanol?
4. A cough medicine contains 0.20% (w/v) dextromethorphan, a cough suppressant, and 2.0% (w/v) guaifenesin, an expectorant.
How many mg of each drug would you obtain from 3.0 tsp of cough syrup? (1 tsp = 5 ml)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6e5946eb-ec82-4e87-af97-b3498153d08f%2Fbb298e1a-3311-4fe1-92a9-ef59e345475c%2Fqoz9c9h_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1. Calculate the percent by mass of chromium in each of the following oxides: (a) CrO3 (b) Cr₂O3
2. A commercial mouthwash contains 4.3 g of ethanol and 0.021g antiseptic in each 30.-mL portion. Calculate the w/v percent
concentration of each component.
3. How many mL of ethanol are contained in a 30.-mL portion of mouthwash that has 8.0% (v/v) of ethanol?
4. A cough medicine contains 0.20% (w/v) dextromethorphan, a cough suppressant, and 2.0% (w/v) guaifenesin, an expectorant.
How many mg of each drug would you obtain from 3.0 tsp of cough syrup? (1 tsp = 5 ml)
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