# Lesson Worksheet: Units and Equations Chemistry

In this worksheet, we will practice defining SI and derived units and writing and manipulating algebraic equations.

Q1:

Which metric prefix denotes the value of the following quantities?

A thousand

• AKilo
• BNano
• CCenti
• DMega
• EMilli

A hundreth

• ACenti
• BMega
• CKilo
• DNano
• EMilli

A thousandth

• ANano
• BMega
• CCenti
• DKilo
• EMilli

Q2:

A small sample of osmium was found to have a mass of 22.6 g. What is that value in kilograms?

Q3:

The density of a substance can be calculated using the following equation:

What is the formula for calculating the volume of a substance when given the mass and density?

• A
• B
• C
• D
• E

Q4:

The rate of a reaction can be calculated using the following equation:

If the mass is in grams (g) and the time is in seconds (s), what is the unit of the rate of reaction?

• A
• Bg/s2
• Cg/s
• Ds⋅g2
• Es/g

Q5:

If 1 dm is equal to 10 cm, which of the following is 1 dm3 equal to?

• A10 cm3
• B1,000 cm3
• C1,000 cm
• D100 cm3
• E1 cm3

Q6:

For an aqueous solution at , the given equation can be applied.

What is the correct form of the equation when rearranged to have pH as the subject?

• A
• B
• C
• D
• E

The pH of a solution is found to be 11. What is the value of the pOH?

Q7:

Which of the following prefixes are ordered descendingly?

• AKilo-, milli-, centi-, nano-, micro-
• BKilo-, centi-, milli-, micro-, nano-
• CKilo-, milli-, centi-, micro-, nano-
• DKilo-, centi-, milli-, nano-, micro-

Q8:

All of the following are incorrect relationships except .

• A1 nanometre = metres
• B10 millimetres = nanometres
• C10 millimetres = nanometres
• D1 nanometre = metres

Q9:

Fill in the blank: A liquid has a volume of 200 mL and a mass of 4,000 g. The density of this liquid is kg/L.

Q10:

Which of the following is equal to 1 mm?

• A nm
• B nm
• C nm
• D nm