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Science · Grade 10

Moles and Quantitative Relationships

Learners meet the mole, the chemist's counting unit that links the invisible world of particles to masses we can weigh. They calculate molar masses, convert between mass, moles and numbers of particles with dimensional analysis, and use percent composition data to work out empirical and molecular formulas.

  • 4 lessons
  • About 115 minutes
  • Moles check: 10 questions
  • Ways to answer: fill in the blanks, choose an answer, draw a graph, match pairs, type a number and put in order
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What learners will discover

  • Explain the mole as a counting unit of 6.02 × 10^23^ particles and convert between moles and numbers of particles.
  • Calculate the molar mass of an element or compound from its formula.
  • Convert between mass and amount in moles with dimensional analysis, and interpret the proportional relationship between them.
  • Calculate percent composition by mass and determine empirical and molecular formulas from experimental data.

Lessons

  1. Counting particles by the mole 6 steps4 practiceabout 24 min
  2. Molar mass 5 steps3 practiceabout 22 min
  3. Mass, moles and particles 7 steps4 practiceabout 30 min
  4. From mass data to formulas 7 steps5 practiceabout 39 min
  5. Moles check 10 questions at the end

Keep exploring

More 10th grade science

Guide for grown-ups