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Science, Chemistry
10th -
12thgrade
Mass Conservation and Reactions Review Quiz
15 questions
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- 1. Multiple Choice
The red numbers in the image below represent ________
subscripts
coefficients
I don't know, and don't want to try
None of the answers are correct
- 2. Multiple ChoiceThe blue numbers in the image below represent ________I don't know, and don't want to trycoefficientssubscriptsnone of the answers are correct
- 3. Multiple ChoiceThe substances at the beginning of a chemical equation are called the ____productyieldchemical symbolreactants
- 4. Multiple Choice
In a chemical reaction, everything to the right of the arrow is called ______________.
Products
Yields
Molecules
Reactants
- 5. Multiple ChoiceThe number of atoms you begin with in a chemical reaction ...must be the same as the number of atoms you end withmust be an even numbercan be different to the number you finish withchanges depending on how much energy is formed
- 6. Multiple Choice
What mathematical function do coefficients perform in a balanced equation?
addition
multiplication
subtraction
division
- 7. Multiple Choice
Why must the number of atoms on either side of the arrow be equal to each other in a chemical equation?
to abide by the law of conservation of energy
to abide by law of conservation of mass
to abide by the law of fundamental equations
because everything must be even for the universe to stay in balance
- 8. Multiple Choice
When balancing a chemical equation, you can only change _________, you can never change _______!
coefficients, subscripts
subscripts, coefficients
formulas, subscripts
coefficients, formula units
- 9. Multiple ChoiceThe Law of Conservation of Matter states that the total mass of the reactants should beMore than the mass of the productsEqual to the mass of the productsIgnored during the reactionLess than the mass of the products
- 10. Multiple ChoiceWhat is the arrow in a chemical equation...
H2 + O --> H2OReactantsProductsYieldsChemical Equation - 11. Multiple ChoiceWhat are Chemical Reactions?It's when you mix substances.a process in which atoms rearrange to form new substancesWhen something bubbles.letter and numbers showing the types and number of atoms
- 12. Multiple Choice
A(an) ______ is the number that appears before a formula in a chemical equation that tells us the number of molecules involved in the reaction.
subscript
coefficient
ratio
denominator
- 13. Multiple Choice_________ is (are) made of more than one atom.A moleculeProtonsNeutronsAn element
- 14. Multiple Choice
During a chemical reaction, atoms ________.
can appear
can disappear
get rearranged
stop moving and vibrating
- 15. Multiple ChoiceHow many Mn atoms are found in the following compound?
3Cr(MnO4)634618 - Answer choicesTagsAnswer choicesTags