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Subjects / LC Chemistry / Stoichiometry, formulas and equations

The mole

Avogadro's number, molar mass and converting between mass, moles and particles.

5th Year6th Year HigherOrdinary
Helps to know first: Atomic structure and isotopes
15practice questions

Multiple choice: 3 · Numeric answer: 10 · Short answer: 2

Each question has up to three hints, a worked explanation, and is tracked in your progress and review plan.

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Numeric answer
How many moles are in 46.8 g of water (H₂O, Mr = 18)?
Whole numbers, decimals (2.5) or fractions (3/4).
Hint 1

n = m/Mr.

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