Assessment - Fall semester (long)

The table above shows four mass readings of one object as measured by four different balances. Which balance measures the mass with the greatest degree of precision?

• Q

• R

• S

• T

A group of students goes on a science field trip to the local hospital. They see the symbol above on one of the examination room doors. This symbol represents that entering this room could expose the students to which of the following dangers?

• Biological hazards

• Harmful radiation

• Corrosive chemicals

• Flammable substances

The ingredients described above are used to make a bonding agent. The most important safety precaution to take when applying this bonding agent is to ---

• dry it with a small flame

• work in a well-ventilated area

• cover the work area with newspaper

• drink lots of water while working with it

Which of the following will allow measurement of a liquid's volume with the greatest precision?

• 50mL cylinder graduated in 1mL increments

• 100mL cylinder graduated in 0.5mL increments

• 100mL cylinder graduated in 1mL increments

• 200mL cylinder graduated in 5mL increments

Four balances are available for students to use for their laboratory experiment. The table shows the range and precision of each balance. The students want to mix 0.100 kg of salt with 2.20 kg of water. Which balance would provide the greatest precision?

• W

• X

• Y

• Z

Which of lthe following quantities has been correctly reported to 4 significant figures?

• 1.034 g

• 1200 mL

• 0.005 amps

• 8090 N

5.368 g ÷ 10.1 mL = 0.531485149 g/mL

Which of the answer choices below shows the density correctly rounded to the proper number of significant digits?

• o.53 g/mL

• 0.531 g/mL

• 0.5314 g/mL

• 0.5315 g/mL

92.6 g - 62.57 g = 30.03 g

Which of the answer choices below shows the mass correctly rounded to the proper number of significant digits?

• 30.0 g

• 30.03 g

• 30.g

• 30 g

0.0500 m

How many significant figures are in the number shown above?

• 1 sig fig

• 5 sig figs

• 3 sig figs

• 4 sig figs

1205000 g

How many significant figures are in the number shown above?

• 3 sig figs

• 6 sig figs

• 4 sig figs

• 7 sig figs