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Chapter 3:Chemical Formula and Equations

3.4Number of moles

Gas Volume

x molar volume

No. of moles

Volume of gas

3.3 Number of moles

Mass

÷ molar volume

x molar mass

No. of moles

Mass of substance

3.2 Number of moles

Number of particles

÷ molar mass

23

x 6.02 x 10

No. of particles

No. of moles

3.5 Chemical equation

23

÷ 6.02 x 10

3.1 Relative Atomic Mass

Relative Molecular Mass

producing

Products

Reactants

RMM/

Mass of one particle of element

RAM

=

1

x

mass of one carbon-12 atom

12

3.5 Chemical formula

Empirical formula-Simplest whole number of atoms in the compound

Molecular formula-Actual number of the atoms in the compound

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