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Pre-Lab Questions Answer the following questions before coming to lab. Show your work fully and clearly. 1. A plastic object was weighed while dry, then it was immersed in water in a graduated cylinder. Using the data in the table at right, calculate the density of the object to the correct number of significant figures. DRY MASS OF OBJECT | 6.31 g WATER VOLUME WITHOUT OBJECT | 19.1 mL WATER VOLUME WITH OBJECT IMMERSED | 23.7 mL 2. Calculate the density of a penny if 25 pennies had a mass of 64.72 g and raised the water in a graduated cylinder from 23.41 mL to 31.54 mL. Include units and correct significant figures. 3. Use the graph paper on the back of this page to plot the data in the table at right. Make the graph fill the page as much as possible; label the axes and choose a uniform scale for each axis. Use a ruler to draw a best-fit line, then answer the following. (Draw dotted lines on the graph showing how you find each each answer.) a. What is the density of gasoline with 11.5% additive? b. What is the percent additive in gasoline with density 0.84 g/mL? c. What is the density of pure gasoline? % FUEL ADDITIVE | DENSITY (g/mL) 2 | 0.82 4 | 0.85 6 | 0.89 8 | 0.92 10 | 0.95 12 | 0.99 14 | 1.02 16 | 1.06

          Pre-Lab Questions
Answer the following questions before coming to lab. Show your work fully and clearly.

1. A plastic object was weighed while dry, then it was immersed in water in a graduated cylinder. Using the data in the table at right, calculate the density of the object to the correct number of significant figures.

DRY MASS OF OBJECT | 6.31 g
WATER VOLUME WITHOUT OBJECT | 19.1 mL
WATER VOLUME WITH OBJECT IMMERSED | 23.7 mL

2. Calculate the density of a penny if 25 pennies had a mass of 64.72 g and raised the water in a graduated cylinder from 23.41 mL to 31.54 mL. Include units and correct significant figures.

3. Use the graph paper on the back of this page to plot the data in the table at right. Make the graph fill the page as much as possible; label the axes and choose a uniform scale for each axis. Use a ruler to draw a best-fit line, then answer the following. (Draw dotted lines on the graph showing how you find each each answer.)
a. What is the density of gasoline with 11.5% additive?
b. What is the percent additive in gasoline with density 0.84 g/mL?
c. What is the density of pure gasoline?

% FUEL ADDITIVE | DENSITY (g/mL)
2 | 0.82
4 | 0.85
6 | 0.89
8 | 0.92
10 | 0.95
12 | 0.99
14 | 1.02
16 | 1.06

Pre-Lab Questions
Answer the following questions before coming to lab. Show your work fully and clearly.

1. A plastic object was weighed while dry, then it was immersed in water in a graduated cylinder. Using the data in the table at right, calculate the density of the object to the correct number of significant figures.

DRY MASS OF OBJECT | 6.31 g
WATER VOLUME WITHOUT OBJECT | 19.1 mL
WATER VOLUME WITH OBJECT IMMERSED | 23.7 mL

2. Calculate the density of a penny if 25 pennies had a mass of 64.72 g and raised the water in a graduated cylinder from 23.41 mL to 31.54 mL. Include units and correct significant figures.

3. Use the graph paper on the back of this page to plot the data in the table at right. Make the graph fill the page as much as possible; label the axes and choose a uniform scale for each axis. Use a ruler to draw a best-fit line, then answer the following. (Draw dotted lines on the graph showing how you find each each answer.)
a. What is the density of gasoline with 11.5% additive?
b. What is the percent additive in gasoline with density 0.84 g/mL?
c. What is the density of pure gasoline?

% FUEL ADDITIVE | DENSITY (g/mL)
2 | 0.82
4 | 0.85
6 | 0.89
8 | 0.92
10 | 0.95
12 | 0.99
14 | 1.02
16 | 1.06

Added by William T.

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