
Flashcardizz Empirical/Molecular Formulas and Stoichiometry
Flashcard
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are mole ratios used for in stoichiometry?
Back
Mole ratios are used for conversions in stoichiometry and are derived from the coefficients of the balanced chemical equation.
2.
FLASHCARD QUESTION
Front
How do you determine the mole ratio of water produced from oxygen in the reaction C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?
Back
The mole ratio of water produced from oxygen is 4 mol H₂O / 5 mol O₂.
3.
FLASHCARD QUESTION
Front
In the reaction 4Al + 3O₂ → 2Al₂O₃, how many moles of aluminum oxide are produced from 6 moles of oxygen?
Back
4 moles of aluminum oxide (Al₂O₃) are produced from 6 moles of oxygen.
4.
FLASHCARD QUESTION
Front
What is the empirical formula of a compound consisting of 72.2% magnesium (Mg) and 27.8% nitrogen (N) by mass?
Back
The empirical formula is Mg₃N₂.
5.
FLASHCARD QUESTION
Front
How many grams of CO₂ are produced when 4 moles of O₂ react with excess CH₄ in the reaction CH₄ + 2O₂ → CO₂ + 2H₂O?
Back
88.02 grams of CO₂ are produced.
6.
FLASHCARD QUESTION
Front
What is the definition of a balanced chemical equation?
Back
A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.
7.
FLASHCARD QUESTION
Front
What is the significance of coefficients in a balanced chemical equation?
Back
Coefficients indicate the number of moles of each substance involved in the reaction and are used to determine mole ratios.
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