1. (2pt) There are four blocks of different materials, which are placed in a wat
ID: 715570 • Letter: 1
Question
1. (2pt) There are four blocks of different materials, which are placed in a water barrel as shown below. These blocks have same volume. Which one of the following statements is true? Please circle your answer A. W is more dense than Y, and X is more dense than Z B. Z is the densest, and Y is the second densest. X has the same density as water, and Y is less dense than water, D. W is the densest, and X is the least dense. E. Z has the same density as water, and X is densest. (4pt) A graduated cylinder contains 50 ml of a liquid. The mass of the graduated cylinder and the liquid is 75 g. The mass of the empty graduate cylinder is 25 g. 2. A. What is the density of the liquid in the graduated cylinder? Show your calculation B. What is the liquid in the graduated cylinder most likely to be? 3. (4pts) A friend showed you a gift she has received- a gold ring. She noticed that the ring felt a little lighter considering its size. In the laboratory, she found its mass is 15.2g. To find the volume of the ring, she used the water displacement method. When she put the ring in a graduated cylinder with water, the ring displaced 1.26mL water.Calculate the density of the ring. Is it really pure gold? Why or why not? (Gold density-19.3g/cm) Show your calculation.Explanation / Answer
1)
from the figure,
Z is densest as it is at the bottom
Then comes X which is floating on surface. It should have same density as water
Both Y and W are less dense than water
Y is more dense than W because more part of Y is immersed
Answer: C
2)
A)
mass of liquid = mass of cylinder with liquid - mass of empty cylinder
= 75 g - 25 g
= 50 g
volume of liquid = 50 mL
use:
density = mass/ volume
= 50 g/50 mL
= 1 g/mL
Answer: 1 g/mL
B)
1 g/mL is density of water.
So, this is most probably water
Answer: water
Only 1 question at a time please
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