Question

A student made the following measurements to determine the identity of an unknown metal from a determination of its density. Data 1. Mass of sample (g) 2. Volume of water (mL) 3. Volume of water plus sample (mL) Sample 1 Sample 2 Sample 3 169.462 120.820 130.713 10.8 14.5 14.0 39.7 34.8 35.9 Use the data in the analysis scheme below to determine the density of each of the three samples of the metal. Enter volume values in units of mL to the nearest 0.1 mL. Do not include the unit. Enter density values in units of g/mL to the nearest 0.01 g/mL. Do not include the unit. Analysis Sample 1 Sample 2 Sample 3 1. Volume of sample (mL) (D3-D2) 28.9 20.3 21.9 2. Density of sample (g/mL) (D1/A1) 5.86 5.95 5.97 Use equation (3) in the lab manual to determine the mean of the density determinations. Enter the value in units of g/mL to the nearest 0.01 g/mL and include the unit. Number Units Use equation (4) in the lab manual to determine the standard deviation of the density determinations. Enter the value in units of g/mL to the nearest 0.01 g/mL and include the unit. Number Units Use the mean density value and Table 1 in the lab manual to determine the metal by name and by symbol

          A student made the following measurements to determine the identity of an unknown metal from a determination of its density.
Data
1. Mass of sample (g)
2. Volume of water (mL)
3. Volume of water plus sample (mL)
Sample 1
Sample 2
Sample 3
169.462
120.820
130.713
10.8
14.5
14.0
39.7
34.8
35.9
Use the data in the analysis scheme below to determine the density of each of the three samples of the metal.
Enter volume values in units of mL to the nearest 0.1 mL. Do not include the unit.
Enter density values in units of g/mL to the nearest 0.01 g/mL. Do not include the unit.
Analysis
Sample 1
Sample 2
Sample 3
1. Volume of sample (mL)
(D3-D2)
28.9
20.3
21.9
2. Density of sample (g/mL)
(D1/A1)
5.86
5.95
5.97
Use equation (3) in the lab manual to determine the mean of the density determinations.
Enter the value in units of g/mL to the nearest 0.01 g/mL and include the unit. Number
Units
Use equation (4) in the lab manual to determine the standard deviation of the density determinations.
Enter the value in units of g/mL to the nearest 0.01 g/mL and include the unit. Number
Units
Use the mean density value and Table 1 in the lab manual to determine the metal
by name
and by symbol

A student made the following measurements to determine the identity of an unknown metal from a determination of its density.
Data
1. Mass of sample (g)
2. Volume of water (mL)
3. Volume of water plus sample (mL)
Sample 1
Sample 2
Sample 3
169.462
120.820
130.713
10.8
14.5
14.0
39.7
34.8
35.9
Use the data in the analysis scheme below to determine the density of each of the three samples of the metal.
Enter volume values in units of mL to the nearest 0.1 mL. Do not include the unit.
Enter density values in units of g/mL to the nearest 0.01 g/mL. Do not include the unit.
Analysis
Sample 1
Sample 2
Sample 3
1. Volume of sample (mL)
(D3-D2)
28.9
20.3
21.9
2. Density of sample (g/mL)
(D1/A1)
5.86
5.95
5.97
Use equation (3) in the lab manual to determine the mean of the density determinations.
Enter the value in units of g/mL to the nearest 0.01 g/mL and include the unit. Number
Units
Use equation (4) in the lab manual to determine the standard deviation of the density determinations.
Enter the value in units of g/mL to the nearest 0.01 g/mL and include the unit. Number
Units
Use the mean density value and Table 1 in the lab manual to determine the metal
by name
and by symbol

Added by Wesley S.

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