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- 1. Multiple Choice
The products of a reaction have the same ________as the reactants.
molecule
atoms
subscripts
coefficients
- 2. Multiple Choice
When balancing this equation, Fe + Cl2 → FeCl3, the correct coefficient for Cl2?
1
2
3
4
- 3. Multiple Choice
Chemical reactions
create and destoy atoms
only occurs outside living organisms
occurs only in living organisms
produce new substances
- 4. Multiple Choice
What does this symbol Δ above the arrow mean?
a precipitate is form
heat is supplied
a calalyst is needed
electricity is needed
- 5. Multiple Choice
Balance this equation, CaCO3(s) → CaO(s) + CO2(g)?
3,1,2
1,1,1
1,3,1
2,6,3
- 6. Multiple Choice
Balance this equation, AlCl3 + NaOH → Al(OH)3 + NaCl
3,1,3,1
1,3,3,1
1,1,1,3
1,3,1,3
- 7. Multiple Choice
Balance the following equation: Cr(s) + Fe(NO3)2 (ag) → Fe(s) + Cr(NO3)3 (ag)
2,3,3,2
2,3,2,3
4,6,6,2
1,3,3,1
- 8. Multiple Choice
Chemical equations
give directions for naming compounds
describe only biological changes
describe chemical reactions
show how to write formulas
- 9. Multiple Choice
In the chemical equation H2O2(ag) → H2O(l) + O2(g), the O2 is a
reactants
yield
products
solid
- 10. Multiple ChoiceFill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO44, 51, 63, 82,2 - 11. Multiple ChoiceWhich side of a chemical equation is the product side?Left (before the yields sign)Right (after the yields sign)
- 12. Multiple ChoiceWhat is a coefficient?The small number on the right of the chemical symbol.The large number to the left of a formula.
- 13. Multiple ChoiceBalance this equation
_Zn+_HCl-->_ZnCl2 +_H21,1,2,11,1,1,21,2,1,12,1,1,1 - 14. Multiple ChoiceBalance this equation.
_Mg + _Cl2 --> _MgCl21, 2,1already balanced2,1,11,1,2 - 15. Multiple ChoiceHow many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O32614
- 16. Multiple ChoiceAt the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?the product is doubledthe product is half the mass of the reactantsthe mass is the samethe mass changes depending on the reaction
- 17. Multiple ChoiceBalance the equation:
Si(OH)4+NaBr--> SiBr4+NaOHSi(OH)4+2NaBr--> SiBr4+NaOHSi(OH)4+4NaBr--> SiBr4+4NaOHSi(OH)4+NaBr--> SiBr4+4NaOHSi(OH)4+2NaBr--> SiBr4+2NaOH - 18. Multiple ChoiceName the part in red:
H2 + O2 -> H2OCoefficientProductYieldSubscript - 19. Multiple Choice
To balance a chemical equation, it may be necessary to adjust the
formulas of the products
subscripts
coefficients
number of products
- 20. Multiple Choice
Which is the correct coefficient to balance this equation, NH4NO2 → N2 + H2O?
1,1,2
1,3,3
3,2,1
1,3,2
- Answer choicesTagsAnswer choicesTags