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Mole Madness
Mass & Percent
Reaction Rumble
Stoich
Yield Champions
100

This number tells how many particles are in one mole.

6.022 × 10²³

100

This formula calculates percent composition.

(part ÷ whole) × 100

100

Before solving stoichiometry problems, you must do this to the equation.

Balance the chemical equation

100

Stoichiometry uses coefficients of a chemical equation to make this

mole ratio

100

This yield is the amount actually obtained in an experiment.

actual yield

200

0.172 mol of CH₄ contains this many molecules.

1.04 × 10²³ molecules

200

This concept explains what fraction of a compound’s mass comes from each element.

Percent Composition

200

In the reaction between AlCl₃ and NaOH, this reactant runs out first and determines product formation.

limiting reactant

200

The mole ratio between KBrO₃ and Br₂ in the reaction
KBrO₃ + 5KBr + 6HNO₃ → 6KNO₃ + 3Br₂ + 3H₂O

1:3

200

This yield is the maximum amount predicted from calculations.

theoretical yield

300

The mass of 1 mole of a substance is called this.

Molar mass

300

If lithium phosphate is 17.9% Li, an 81.1 g sample contains about this many grams of lithium.

14.5 g Li

300

This reactant remains after the reaction is complete.

excess reactant

300

To convert from grams of reactant to grams of product you must first convert grams to this unit.

Moles

300

This formula calculates percent yield.

(actual ÷ theoretical) × 100

400

Mass of 2.48 mol of NaNO₃

211 g

400

Sodium chloride is 39.3% sodium. A 92.4 g sample contains about this many grams of sodium.

36.3 g Na

400

Reactants of combustion reaction

hydrocarbon and oxygen gas

400

In stoichiometry, the step that uses mole ratios is called this type of conversion.

mole to mole conversion

400

If theoretical yield is 12.0 g and actual yield is 13.2 g, the percent yield is this.

110%

500

Molecules in 0.145 mol of CH₄

8.73 × 10²² molecules

500

If a compound is 40% element A, a 250 g sample contains this many grams of A.

100 g

500

products of combustion reaction

CO2 and H2O

500

The amount of product predicted by stoichiometry is called this.

theoretical yield

500

A percent yield greater than 100% usually means this happened in the experiment.

measurement error or impurities in the product