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- 1. Multiple ChoiceWhat coefficient should be used to make the following equation balanced?
N2+O2--> _NO1234 - 2. Multiple ChoiceWhich problem is balanced?
(Check ALL answers)PbO2 + 2H2SO2 + H20 --> H2SO42Na + 2H2O --> 2NaOH + H2 - 3. Multiple ChoiceHow many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H21234 - 4. 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
- 5. Multiple ChoiceWhich of the following equations are correctly balanced?12CO2 +H2O --> C6H12O6 + O2CO2 + 9H2O --> C6H12O6 + O2CO2 + H2O --> 3C6H12O6 + O26CO2 + 6H2O --> C6H12O6 + 6O2
- 6. Multiple Choice
Balance the following equation:
___ H2+ ___ O2→___ H2O
1, 1, 3
2, 2, 2
1, 2, 1
2,1, 2
- 7. Multiple Choice
Balance the following equation:
___ Mg+ ___ O2→___ MgO
1, 1, 3
2, 1, 2
1, 2, 1
2, 2, 2
- 8. Multiple Choice
Balance the following equation:
___ SeCl6+ ___ O2→___ SeO2+____Cl2
1, 1, 1, 3
2, 1, 2, 1
1, 2, 1, 2
2, 2, 2, 4
- 9. Multiple ChoiceBalance this equation
_Zn+_HCl-->_ZnCl2 +_H21,1,2,11,1,1,21,2,1,12,1,1,1 - 10. Multiple ChoiceBalance this equation
_N2 + _H2 --> _NH31,2,31,3,21,1,22,1,1 - 11. Multiple ChoiceBalance this equation:
P4+O2 --> P2O33 P4+ O2 --> 2 P2O3P4+ O2 --> 2 P2O3P4+ 3 O2 --> 2 P2O3P4+ 2 O2 --> 3 P2O3 - 12. Multiple ChoiceBalance this equation...
HgO --> 2Hg + O2It is balanced2HgO --> Hg + O22HgO --> 2Hg + O2I don't know...Oh well! - 13. Multiple ChoiceBalance this equation...
H2 + Cl2 --> HClIt is balanced3H2 + Cl2 --> 6H2ClH2 + Cl2 --> 2HClI don't know! Oh well. - 14. Multiple ChoiceWhich of the following is an unbalanced equation?CaCO3 --> CaO + CO2PbO2 + 2H2-->2Pb + H2O2Na+ 2H2O-->2NaOH + H2CS2 + 2O2 --> CO2 + 2SO2
- 15. Multiple ChoiceWhich of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O34Fe + 3O2 -> 2Fe2O32 Fe + 3O2 -> Fe2O64 Fe + O6 -> 2Fe2O3None of the options are correctly balanced. - 16. Multiple ChoiceA sealed test tube containing 8 grams of iron filings and 5 grams of sulfur is heated until the material in the test tube glows bright red. What is the mass of products?Mass is less than 13 gramsMass is equal to 13 gramsMass is greater than 13 gramsMass cannot be measured
- 17. Multiple ChoiceWhat is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe2O3--> __Fe + __CO23,1 --> 2,33,2 --> 1,13,2 --> 2,43,2 --> 2,1
- 18. Multiple Choice
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?
__Ca + __H2O --> __Ca(OH)2 + __H2
2,1 --> 2,11,2 --> 1,11,2 --> 2,41,2 --> 2,1 - Answer choicesTagsAnswer choicesTags