Reactants and Products review

Flashcard
•
Chemistry
•
6th - 8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a subscript in a chemical formula?
Back
A subscript is a number written below and to the right of an element symbol in a chemical formula, indicating the number of atoms of that element in a molecule.
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 in a reaction, indicating how many molecules of that substance are present.
3.
FLASHCARD QUESTION
Front
What are reactants in a chemical reaction?
Back
Reactants are the starting substances in a chemical reaction that undergo change to form products.
4.
FLASHCARD QUESTION
Front
What are products in a chemical reaction?
Back
Products are the substances formed as a result of a chemical reaction.
5.
FLASHCARD QUESTION
Front
In the reaction 2H₂ + O₂ → 2H₂O, what are the reactants?
Back
The reactants are 2H₂ (hydrogen gas) and O₂ (oxygen gas).
6.
FLASHCARD QUESTION
Front
In the reaction 2H₂ + O₂ → 2H₂O, what is the product?
Back
The product is 2H₂O (water).
7.
FLASHCARD QUESTION
Front
What does the law of conservation of mass state?
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the mass of the reactants equals the mass of the products.
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