What is a mole in chemistry?
608 Flashcard Practice: Molar Ratios and Conversions

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Science
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A mole is a unit of measurement used to express amounts of a chemical substance. It is defined as the amount of substance that contains as many elementary entities (atoms, molecules, etc.) as there are atoms in 12 grams of carbon-12.
2.
FLASHCARD QUESTION
Front
What is a molar ratio?
Back
A molar ratio is the ratio of the amounts in moles of any two compounds involved in a chemical reaction. It is derived from the coefficients of the balanced chemical equation.
3.
FLASHCARD QUESTION
Front
How do you calculate the number of moles needed from a balanced equation?
Back
To calculate the number of moles needed, use the coefficients from the balanced equation to set up a proportion based on the moles of the substance you have.
4.
FLASHCARD QUESTION
Front
What is the balanced equation for photosynthesis?
Back
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
5.
FLASHCARD QUESTION
Front
If 2 moles of C₂H₆ react with 7 moles of O₂, what is the mole ratio of C₂H₆ to O₂?
Back
The mole ratio of C₂H₆ to O₂ is 2:7.
6.
FLASHCARD QUESTION
Front
How many moles of O₂ are needed to react with 6 moles of C₂H₆?
Back
21 moles of O₂ are needed.
7.
FLASHCARD QUESTION
Front
What is the mole ratio of Ba(OH)₂ to AlPO₄ in the reaction AlPO₄ + Ba(OH)₂ → Al(OH)₃ + Ba₃(PO₄)₂?
Back
The mole ratio is 3 mol Ba(OH)₂ / 2 mol AlPO₄.
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