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5: Formulae, Equations and Amounts of Substance

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Total cards: 8•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (8)

#1
Front (Question)

What is the mole (mol)?

Back (Answer)

The unit for amount of a substance

#2
Front (Question)

How many molecules are in a mole?

Back (Answer)

Avogadro constant (L = 6.02 × 1023)

#3
Front (Question)

What is the molar mass of a substance?

Back (Answer)

The mass per mole of the substance. gmol-1

#4
Front (Question)

What is the molecular formula?

Back (Answer)

The number and type of atoms.

#5
Front (Question)

What is the empirical formula?

Back (Answer)

The simplest whole number ratio of atoms.

#6
Front (Question)

What does each letter represent in the ideal gas equation?

Back (Answer)

pV = nRT p - pressure (Pa) V - volume (m3) n - amount (mol) R - gas constant (Jmol-1K-1) T - temperature (K)

#7
Front (Question)

What colour is universal indicator in acidic, neutral and basic solutions?

Back (Answer)

Acid: Red / Orange Neutral: Green Base: Blue / Purple

#8
Front (Question)

What is the atom economy of a reaction?

Back (Answer)

Atom economy = (RFM of desired product / RFM of all products) x 100