11. What is the percentage concentration in the following solution given 5g sucrose in 90g water?

A. 5.26 %

B. 5.25 %

C. 5.56 %

D. 5.55 %
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12. What is the percent by mass if 10.0 g of copper is added to enough zinc to produce 110 g of an alloy?

A. 9.11 %

B. 8.33 %

C. 9.01 %

D. 9.09%
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13. You brought an 18 karats ring which contains 18 g of gold. What is the percent by mass of gold in a ring?

A. 75 %

B. 25 %

C. 7.5%

D. 50 %
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14. What is the volume of a 25% methyl solution that contains 30 mL of methyl?

A. 83 mL

B. 7.5 mL

C. 75 mL

D. 8.3 mL
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15. What is the percent by volume of a solution formed by mixing 30 mL of ethanol with 70 mL water?

A. 0.3 %

B. 30 %

C. 42.86 %

D. 43 %
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16. Which of the following tells that the concentration of solution is described quantitatively?

A. Knowing the exact amount of solute and solvent combined to prepare the solution

B. Measuring the amount of solvent and solute in the solution

C. Observing the appearance of the solution

D. A & B
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17. What is the concentration (in volume percent) of the Toluene in a solution made by mixing 30 mL of Toluene in 70 mL Benzene? Assume that the total volume of the solution is the sum of the volume of components,

A. 0.3 %

B. 30 %

C. 42.86 %

D. 43 %
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18. How many mL of ethanol is present in 250 mL of solution with 70% V/V?

A. 175 mL

B. 17.5 mL

C. 28 %

D. 30 %
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19. Which of the following is a unit of mass? a

A. g

B. ML.

C. ft.

D. vol.
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20. Qualitative expression of concentration can be ?

A. Dilute & Salute

B. Concentrated & Dilute

C. Solute & Concentration

D. Concentrated and Unsaturated
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