Balancing Equations Practice
Flashcard
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a balanced chemical equation?
Back
A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.
2.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.
3.
FLASHCARD QUESTION
Front
What is a subscript in a chemical formula?
Back
A subscript is a small number written to the right of an element symbol that indicates the number of atoms of that element in a molecule.
4.
FLASHCARD QUESTION
Front
How do you balance the equation PCl5 + H2O → HCl + H3PO4?
Back
The balanced equation is PCl5 + 4 H2O → 5 HCl + H3PO4.
5.
FLASHCARD QUESTION
Front
What is the first step in balancing a chemical equation?
Back
The first step is to write down the number of atoms of each element present in the reactants and products.
6.
FLASHCARD QUESTION
Front
What does it mean to have a 'reactant' in a chemical equation?
Back
A reactant is a substance that undergoes a chemical change in a reaction, found on the left side of the equation.
7.
FLASHCARD QUESTION
Front
What does it mean to have a 'product' in a chemical equation?
Back
A product is a substance that is formed as a result of a chemical reaction, found on the right side of the equation.
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