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Questions and Answers
What is the concentration of copper in ppb units in an alloy containing 5 g of an alloy with 10 mg of copper?
What is the concentration of copper in ppb units in an alloy containing 5 g of an alloy with 10 mg of copper?
- 2000 ppb
- 1000 ppb
- 100 ppb
- 200 ppb (correct)
What is the unit of measurement represented by %w/w?
What is the unit of measurement represented by %w/w?
- Grams of solute per 100 mL of solution
- Milliliters of solute per 100 mL of solution
- Grams of solute per 100 g of solution (correct)
- Grams of solute per liter of solution
What is the concentration of a substance in a solution with 2 g of the substance in 100 mL of solution in %w/v units?
What is the concentration of a substance in a solution with 2 g of the substance in 100 mL of solution in %w/v units?
- 2 %w/v (correct)
- 20 %w/v
- 5 %w/v
- 10 %w/v
How many milligrams of a substance are required to prepare 500 mL of a solution with a concentration of 2000 ppb?
How many milligrams of a substance are required to prepare 500 mL of a solution with a concentration of 2000 ppb?
What is the difference between physical and chemical methods of expressing concentration?
What is the difference between physical and chemical methods of expressing concentration?
What is the concentration of a substance in a solution with 5 g of the substance in 100 g of solution in %w/w units?
What is the concentration of a substance in a solution with 5 g of the substance in 100 g of solution in %w/w units?
What does the abbreviation 'ppb' represent?
What does the abbreviation 'ppb' represent?
What is the concentration of a substance in a solution with 10 mL of the substance in 100 mL of solution in %V/V units?
What is the concentration of a substance in a solution with 10 mL of the substance in 100 mL of solution in %V/V units?
How many grams of a substance are required to prepare 100 mL of a solution with a concentration of 5 g/L?
How many grams of a substance are required to prepare 100 mL of a solution with a concentration of 5 g/L?
What is the main difference between physical and chemical methods of expressing concentration?
What is the main difference between physical and chemical methods of expressing concentration?
