Topic 3 The Mathematics of Formulas and Equations

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Presentation transcript:

Topic 3 The Mathematics of Formulas and Equations Midterm Review Topic 3 The Mathematics of Formulas and Equations

Vocabulary Formula Mass Gram Formula Mass Mole Percentage Composition

Formula Mass The mass of the smallest unit of the compound is the formula mass also called molecular mass Measured in amu

Gram Formula Mass The gram formula mass of a substance is simply the formula mass expressed in grams instead of amu Also called gram molecular mass

Percent Composition The percent composition of a substance represents the composition as a percentage of each element compared to the total mass of the compound

The Mole A mole is defined as the number of atoms of carbon present in 12 grams of C-12. The number of particles in a mole of a substance is 6.022 x 1023 This is called Avogadro's number

Converting between grams and moles

Finding Molecular and Empirical Formulas

Mole Relationships in Balanced Equations

Mole Relationships in Balanced Equations The coefficients represent both the basic unit and the mole ratio in balanced chemical equations