Lab Practical Review

Which is NOT an acceptable unit for density?

• g/mL

• g

• g/cm³

A graduated cylinder was filled with 25.0mL of water. A 5g pebble was dropped into the cylinder and the volume increased to 26.0mL. Calculate the density of the pebble. Include units!

• 5 g/mL
• 5 g

• 1 g/mL

• 1 g

An unknown liquid has a mass of 7.69 g and volume of 8.24 mL.  What is its density? Round to 3 decimal places.

• 0.933 g/mL
• 0.933 mL

• 63.366 g/mL

• 63.366 g

What is the equation for slope?

• D = m/V

• y = mx + b

Calculate the density of metal B using the points (10,80) and (5,40) from the graph. (Hint: how do we find density from a mass vs. volume graph?)

• 8 g/cm3
• 8 g/mL

• 5 g/mL

• 5 g

Calculate the density of metal A using the points (9,100) and (1,10) from the graph. (Hint: how do we find density from a mass vs. volume graph?)

• 11.25 g/cm3
• 11.25 g

• 10 g/mL

• 10 cm3

What is the definition of the y-intercept?

• The value of x when y is 0

• The value of y when x is 0

• The slope of the line

• The point (0,0)

What would be the equation for the line of metal B? Remember you calculated the slope to be 8 g/cm³

• y = 8x + 1

• y = x + 8

• y = 8x + 0

• y = 8x + b

If you did not have this graph, you would still know that the y intercept should be 0. Why?

• All graphs start at (0,0)

• If there is no volume, there is no mass

• That is where a line starts

• Idk

What is the density of water?

• 1 g/mL

• 1 mL

• 0.5 g/mL

• 0.79 g/mL