Please help me answer these questions! Its some homework that is due by thursday
ID: 912313 • Letter: P
Question
Please help me answer these questions! Its some homework that is due by thursday.
1. On this table I was asked to find the densities. I would first ask if I had solved the densities correctly with the right significant figures.
Mass
Volume
Density
Oak
12.2
18.8
0.649
Nylon
9
10
0.9
PVC
100
74
1.35
Titanium
51
12.4
4.11
Copper
22
2.5
8.8
Mercury
6
0.45
13
The densities for the cylinders used in the chart above are shown in the table below. How do the numbers compare to the calculated values? What sources of error could cause the differences?
Substance
Density (g/cm3)
Aluminum
2.7
Acrylic
1.2
Polyethylene
0.
The percentage of sucrose in a beverage was determined using density, however many commercial beverages are made with high fructose corn syrup and not sucrose. Even beverages such as juice are not primarily sucrose.
2. Are the percentage concentration of sucrose determined in this activity accurate? Why or why not? If it is not, what could be done to make it more accurate?
3. Beyond sucrose types, what other factors may exist in the determination of percentage concentration of sucrose? What were potential sources of error?
Mass
Volume
Density
Oak
12.2
18.8
0.649
Nylon
9
10
0.9
PVC
100
74
1.35
Titanium
51
12.4
4.11
Copper
22
2.5
8.8
Mercury
6
0.45
13
Explanation / Answer
1. We know that density = mass / volume
For Oak:
Density = 12.2 / 18.8
= 0.649
For Nylon:
Density = 9 / 10
= 0.9
For PVC:
Density = 100 / 74
= 1.3
For Titanium:
Density = 51 / 12.4
= 4.1
For Copper:
Density = 22 / 2.5
= 8.8
For Mercury:
Density = 6 / 0.45
= 13
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