Chemistry Midterm Review

Why should goggles be worn during laboratory experiments?

• To enhance visual clarity.

• To prevent eye injuries from hazardous materials.

• Only if you are not wearing contact lenses.

• To look professional in the lab.

Which of the following pieces of laboratory equipment is the most appropriate to use for accurately measuring liquid volumes?

• Beaker

• Test tube

• Graduated cylinder

• Erlenmeyer flask

Which of the following measurements is quantitative?

• The solution changes the color of pH paper.

• The solution has a pH of 7.

• The solution feels slippery.

• The solution is transparent.

Which of the following is an example of a qualitative observation?

• A liquid boils at 100 degrees Celsius.

• A metal rod is 15 cm long.

• A solution turns blue when a chemical is added.

• A gas has a pressure of 2 atm.

The number 0.0930 contains how many significant figures?

• 5

• 4

• 3

• 2

Expressed in scientific notation, the measurement 0.0930 m is

• 93.0 x 10⁻³ m

• 9.30 x 10⁻² m

• 93.0 x 10³ m

• 9.30 x 10² m

Expressed in scientific notation, the measurement 65000 cm is a.

• 65 x 10⁻⁴ cm

• 6.5 x 10⁻⁵ cm

• 6.5 x 10⁵ cm

• 65 x 10⁴ cm

Which of the following is an example of a physical property?

• density

• reactivity

• combustibility

• Bubbling

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

One chemical property of matter is

• Boiling point

• Texture

• Reactivity

• Density

Tags

NGSS.MS-PS1-2

Which of the following is NOT an example of a pure substance?

• Sucrose (C₁₂H₂₂O₁₁)

• Carbon (C)

• Methane (CH₄)

• Air (N₂, O₂, Ar, CO₂, H₂O)