Chemical reactions grade 7
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•
Chemistry
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process where substances (reactants) are transformed into new substances (products) through the breaking and forming of chemical bonds.
2.
FLASHCARD QUESTION
Front
What are reactants in a chemical equation?
Back
The substances that undergo a chemical change, found on the left side of a chemical equation.
3.
FLASHCARD QUESTION
Front
What are products in a chemical equation?
Back
The new substances formed as a result of a chemical reaction, found on the right side of a chemical equation.
4.
FLASHCARD QUESTION
Front
What does the principle of conservation of mass state?
Back
Matter is not created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
5.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.
6.
FLASHCARD QUESTION
Front
How do you balance a chemical equation?
Back
By adjusting the coefficients of the reactants and products to ensure the same number of each type of atom on both sides of the equation.
7.
FLASHCARD QUESTION
Front
What is the chemical formula for hydrochloric acid?
Back
HCl
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