The Mole and Stoichiometry flashcards

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What is relative formula mass?Molar Mass: Sum of relative atomic masses indicated by a formula.
What is approximate H₂O relative mass?Molar Mass: 18 using H ≈ 1 and O ≈ 16.
What is molar mass unit?Molar Mass: g/mol.
What is mass percent?Molar Mass: Component mass divided by total mass times 100%.
What is molar mass?Molar Mass: Mass per mole of a substance.
How do parentheses affect atom count?Molar Mass: The outside subscript multiplies all atoms inside.
Does the greatest subscript guarantee the greatest mass contribution?Molar Mass: No; atomic mass also matters.
What does a mole count?Mole Conversions: A specified number of entities.
How are grams converted to moles?Mole Conversions: Divide mass by molar mass.
How are moles converted to particles?Mole Conversions: Multiply by the Avogadro constant.
Can equal moles have different masses?Mole Conversions: Yes, if their molar masses differ.
What is a stoichiometric ratio?Reaction Quantities and Limiting Reactants: A coefficient-based ratio of reacting or produced amounts.
What is a limiting reactant?Reaction Quantities and Limiting Reactants: The reactant exhausted first under the equation ratio.
What is theoretical yield?Reaction Quantities and Limiting Reactants: Maximum predicted product from the limiting reactant in an ideal model.
What is percent yield?Reaction Quantities and Limiting Reactants: Actual yield divided by theoretical yield times 100.
What do balanced coefficients compare?Reaction Quantities and Limiting Reactants: Amounts in moles, not equal masses.