Question

1. In a chemistry class, Gabby prepared a solution by mixing 25 gram (g) of sugar
in 80g of water. What are the concentrations of the solute and solvent in percent (% by mass?
A. Solute: 34%; Solvent: 60%
B. Solute: 14%; Solvent: 86%
C. Solute: 24%; Solvent: 76%
D. Solute: 44%; Solvent: 56%
2. How many parts of copper and gold needed to produce 18 Karat (K) jewelry?
A. 18 parts is made up of copper and 6 parts is gold
B. 18 parts is made up of gold and 6 parts is copper
C. 18 parts is made up of gold and 9 parts is copper
D. 18 parts of the jewelry is made up of finest gold suited for the purpose.
3. What is the percentage concentration in the following solution given that 5g sucrose in 90g water?
A. 4 %
B. 5 %
C. 6 %
D. 7%
4. A beverage contains 3% alcohol which means that:
A. The solution contains 3mL of alcohol in 97mL of water.
B. The solution contains 30mL of alcohol in 70mL of water.
C. The solution contains 300mL of alcohol in 700mL of water.
D. The solution contains 100mL of alcohol in 100mL of water.
5. Sterling silver contains 95% silver. If a necklace made of sterling silver weighs 15g, what is the mass of silver dissolved in the necklace?
A. 1.6g
B. 6.2g
C. 9.0g
D. 14.25g​

Answer 1

Answer:

1 b

2 d

3 c

4 a

5 d I think it's helpfully for you