Pre-Lab Quiz Determination of Density

A block has a mass of 4.495 g and a volume of 147.4 cm3. Calculate the density in g/cm3.

0.03050 g/cm^3

A block has a mass of 4.789 g and a volume of 133.1 cm3. Calculate the density in g/cm3.

0.036 g/cm^3

The equation to calculate density is _______, , where D is the density, m is the __________, , and V is the _________.

1. D=M/V 2. MASS 3. VOLUME

A 2.54 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that contains 12.13 mL H2O. . What will be the final volume reading on the graduated cylinder, in mL?

12.49 mL

Calculate the volume of a box, in cubic centimeters, which is 423 cm long, 12 cm wide, and 25 cm high. Report your answer with correct significant figures in cubic centimeters.

130,000

What is the correct way to report the length of the rectangle in centimeters?

15.60 cm

A graduated cylinder contains 10.00 mL water. A 14.74 g piece of aluminum is added to the water, and the volume rises to 15.46 mL. What is the density of the aluminum in g/mL?

2.7 g mL

A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in mL)?

31.9 mL

A series of measurements in the lab led to an experimental result of 32.9 mL, with a calculated standard deviation of 0.3 mL. What is the standard way to report this result?

32.9 -+ 0.3 mL

What is the correct reading for the graduated cylinder in the close-up? Make sure to report your reading with the appropriate significant figures.

40.5 mL

In order to use a pipet, place a ________ at the top of the pipet. Use this object to fill the pipet such that the ________ of the liquid is even with the volume line. Release the liquid, touching the tip of the pipet to the side of the container if necessary to release the last drop ________ the pipet tip.

bulb or pump meniscus outside

When a vinegar and oil salad dressing separates into two layers, the oil floats on top of the vinegar. The density of the oil ____________ the density of the vinegar

is less than