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- 1. Multiple Choice
What is the Law of Conservation of Mass?
It states that matter cannot be created or destroyed.
It states that energy cannot be created or destroyed.
It states that matter can be created or destroyed.
It states that sound can be created or destroyed.
- 2. Multiple ChoiceWhat is a coefficient?The small number on the right of the chemical symbol.The large number in front of a chemical formula.The number in between the chemical symbols.The number behind a chemical formula.
- 3. Multiple ChoiceWhat is the part of the chemical equation in green called?
Fe + S --> FeSproductsreactantsyieldchemical formula - 4. Multiple ChoiceWhat is the little number after an element in a chemical equation called.
Example: H2CoefficientSubscriptAtomEquation - 5. Multiple ChoiceWhat coefficient should be used to make the following equation balanced?
N2+O2--> _NO1234 - 6. Multiple ChoiceWhich problem is balanced?
(Check ALL answers)PbO2 + 2H2SO2 + H20 --> H2SO42Na + 2H2O --> 2NaOH + H2 - 7. Multiple ChoiceHow many elements are in C6H12O6?1234
- 8. Multiple ChoiceElement or compound?
H2Oelementcompound - 9. Multiple ChoiceHow many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H21234 - 10. Multiple ChoiceIs this balanced?
Al + O2 → 2Al2O3YesNo - 11. Multiple Choice
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
yes
no
- 12. Multiple Choice
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2,6,3,2
it's already balanced
4,12,3,4
2,1,4,5
- 13. Multiple ChoiceWhat does the Law of Conservation of Mass state?Matter cannot be gained or lost in a chemical reaction.Matter can only be lost in a chemical reaction.Matter can only be gained in a chemical reaction.Matter can be gained and lost in a chemical reaction.
- 14. Multiple ChoiceWhat is the left part of a chemical equation called?
2H2 + O2 --> 2H2OReactantsProductsYieldsChemical Equation - 15. Multiple ChoiceWhat is the right part of a chemical equation called...
2H2 + O2 --> 2H2OReactantsProductsYieldsChemical Equation - 16. Multiple ChoiceWhat is the total number of atoms present in 5Na3PO4540558
- 17. Multiple ChoiceIs the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2Oyesno - 18. Multiple ChoiceIs the following equation balanced?
4Fe + 3O2 --> 2Fe2O3yesno - 19. Multiple ChoiceIs the following reaction balanced?
NaHCO3 --> Na2CO3 + H2O + CO2yesno - 20. Multiple ChoiceIs the following reaction balanced?
2CH3OH + 3O2 --> 2CO2 + 4H2Oyesno - Answer choicesTagsAnswer choicesTags