Key Concepts in Chemistry: Atoms, Moles, and Stoichiometry

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14 Terms

1

atom

The smallest unit of an element.

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2

formula unit

The smallest unit of an ionic compound.

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3

molecule

The smallest unit of a molecular compound.

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4

mole

A unit of measurement used to quantify the amount of a substance.

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5

6.02 x 10^23

The number of particles in a mole.

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6

molar mass

The mass of one mole.

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7

Stoichiometry

Calculating quantities of reactants and products from a chemical equation.

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8

limiting reactant

The reactant that gets used up first.

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9

theoretical yield

The amount of product that should form during the reaction, determines the limiting reactant.

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10

actual yield

The yield that differs from the theoretical yield.

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11

empirical formula

The already reduced formula.

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12

finding an empirical formula

Look for the option that cannot be reduced.

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13

Limiting Reactant

The reactant that is completely consumed first.

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14

Not Determined by Limiting Reactant

Actual yield of product formed in practice.

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