Chemistry

Important note: Remember that all of your measurements should be expressed with appropriate significant figures . Also be sure to indicate units where appropriate.

You are asked to determine the density of an object by two different methods.

Procedure I: Determine the dimensions (length, width, height, diameter) of a regular objects using a ruler.

Record data in Table 1 in the corresponding columns.

Weigh the objects using a balance. Record data in Table 1.

Calculate the density of the objects. Pay attention to significant figures and units.

Equations: Volrect = length x width x height

Density =mass/volume

Table 1:

	Length	Width	Height	Volume	Mass	Density
Cube	2.5cm	2.5cm	2.5cm		12.75g

Calculation:

Procedure 2:

Using an appropriately sized graduated cylinder, determine the volume of the object. Use the table below to fill in your data. Then perform your calculations below the table and fill in your final answers to parts A and B.

Table 2:

Mass (g)	VInitial (mL)	VFinal (mL)	Vglass_beads (mL)
15.25	11.5	16.3

Density of the object: _____________

Calculation:

Question: If all of the other students in lab correctly perform this experiment and this calculation, should their density match yours? Why or why not?