Tenth graders learn the mole — chemistry’s counting unit (6.02 × 10²³ particles) — and how to calculate molar mass by summing atomic masses, the bridge between the atomic world and grams we can weigh.
Students will be able to…
Atoms are far too tiny to count one by one — so chemists count them in “moles.” What is a mole, and how does it let us weigh out an exact number of atoms?
Project each item and have students answer about moles and molar mass. The tool explains Avogadro’s number and molar-mass math.
Tap any phase to open the teacher moves and student actions.
Atoms are too tiny to count — so how do chemists count them?
Students investigate.
Students explain.
Students elaborate.
Students conclude.
Aligned to the Next Generation Science Standards (High School Physical Science / Chemistry).
Use mathematical representations to support the claim that mass is conserved (moles/stoichiometry).
Construct explanations for chemical reactions.
Plan investigations of substance properties.
Using mathematics and computational thinking.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students convert a mass in grams to moles (and to particles) using molar mass and Avogadro’s number. A printable mole sheet is in the Science library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.