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: Densitymassvolume=.

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

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

Q4:

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

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 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?

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

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

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