Lesson Worksheet: Units and Equations Chemistry

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


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


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


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

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

  • AVolumedensitymass=
  • BVolumemassdensity=
  • CVolumemassdensity=+
  • DVolumemassdensity=×
  • EVolumemassdensity=


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

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

  • Ags×
  • Bg/s2
  • Cg/s
  • Ds⋅g2
  • Es/g


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


For an aqueous solution at 25C, the given equation can be applied. pHpOH+=14

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

  • ApHpOH=14
  • BpHpOH=14×
  • CpHpOH=14
  • DpHpOH=14
  • EpHpOH=14+

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


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-


All of the following are incorrect relationships except .

  • A1 nanometre = 10 metres
  • B10 millimetres = 10 nanometres
  • C10 millimetres = 10 nanometres
  • D1 nanometre = 10 metres


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.


Which of the following is equal to 1 mm?

  • A1×10 nm
  • B1×10 nm
  • C1×10 nm
  • D1×10 nm

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