Have an account?
Skip to Content
Build your own quiz
40 questions
Show Answers
See Preview
- 1. Multiple ChoiceBalance this equation...
HgO --> 2Hg + O2It is balanced2HgO --> Hg + O22HgO --> 2Hg + O2 - 2. Multiple Choice
Balance this equation...
Sb2S3 + O2 --> Sb + SO2
It is balanced
Sb2S3 + 3O2 --> 2Sb + 3SO2
Sb2S3 + O2 --> 2Sb + SO2
What is Sb?
- 3. 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. - 4. Multiple Choice
Which of the following correctly balances this equation:
Sodium phosphate and potassium hydroxide will produce sodium hydroxide and potassium phosphate.
1 Na3PO4+3 KOH
--->
3 NaOH + 1 K3PO4
2 Na3PO4+2 KOH
--->
3 NaOH + 1 K3PO4
1 S3PO4+3 SOH
--->
3 SOH + 1 K3PO4
3 Na3P+3 KO2H
--->
3 NaH2O + 1 K3P
- 5. Multiple Choice
What coefficient belongs with HCl?
Mg + ___ HCl → MgCl2 + H2
1
2
3
4
- 6. Multiple ChoiceBalance this equation:
2Li + Cl2 -> LiCl2Li + Cl2 -> 4LiCl22Li + Cl2 -> LiCl22Li + Cl2 -> 2LiCl - 7. Multiple Choice
Which coefficients will correctly balance this equation:
_Al +_HCl --> _H2 +_AlCl3
2, 6, 3, 2
it is already balanced
4, 12, 3, 4
2, 1, 4, 5
- 8. Multiple Choice
Choose the coefficients that will correctly balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
1,2,1,1
2,1,2,1
1,2,1,2
0,2,0,2
- 9. Multiple ChoiceWhat is the left part of a chemical equation called...
H2 + O --> H2OReactantsProductsYieldsChemical Equation - 10. Multiple ChoiceKClO3 --> KCl + O2
What coefficient would go in front of KCl?1234 - 11. Multiple ChoiceBaF2 + K3PO4 --> Ba3(PO4)2 + KF
What coefficient goes in front of K3PO4?1234 - 12. Multiple Choice
Which type of chemical reaction forms Carbon Dioxide and Water?
Double Replacement
Single Replacement
Combustion
Decomposition
- 13. Multiple ChoiceName this reaction: 2Ca + O2 --> 2CaODecompositionSynthesisDouble ReplacementCombustion
- 14. Multiple ChoiceBalance this equation:
___NH3 + ___O2 --> ___NO + ___H2O4NH3 + 5O2 --> 4NO + H2OIt's already balanced.4NH3 + 5O2 --> 4NO + 6H2O - 15. Multiple Choice____ P4 + ____ O2 --->____ P2O31,3,21,1,11,2,32,1,2
- 16. Multiple ChoiceWhich type of reaction is:
2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOHSynthesisSingle DisplacementDouble DisplacementCombustion - 17. Multiple ChoiceFill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO44, 51, 63, 82,2 - 18. Multiple Choice
The red numbers in the image below represent ________subscriptscoefficientsI don't know, and don't want to tryNone of the answers are correct - 19. Multiple ChoiceHow many O's are in Al₂(SO₄)₃412724
- 20. Multiple Choice
What is the right part of a chemical equation called...
H2 + O2 --> H2O
Reactants
Products
Yields
Chemical Equation
- 21. Multiple Choice
What is the arrow in a chemical equation...
H2 + O2 --> H2O
Reactants
Products
Yields
Chemical Equation
- 22. Multiple ChoiceWhat is the little number after an element in a chemical equation called.
Example: H2CoefficientSubscriptAtomEquation - 23. Multiple Choice
What do the elements oxygen, hydrogen, and chlorine have in common?
all are metals
all exist as diatomic moolecules
all have positive charge numbers
all give electrons to satisfy the octet rule
- 24. Multiple Choice
What is meant by a "diatomic molecule?
It is an atom that always has a coefficient of 2 in a balanced equation
it is an element that always has a plus 2 charge
it is a compound that has two elements only
it is when two atoms of the same element pair up to satisfy the octet rule
- 25. Multiple Choice
In a decomposition reaction...
a more complex substance, like a compound, is broken into smaller parts
two or more polyatomic ions are combined to compose a more complex molecule
ionic bonds are broken and reformed as covalent bonds
two single atoms are combined to make a compound
- 26. Multiple Choice
The law of conservation of mass states...
the coefficients in a balanced equation must be the same on both sides of the arrow
that matter cannot be created nor destroyed
the charge must be conserved from the reactants to the products
subscripts in chemical formulas must all be equal
- 27. Multiple ChoiceHow many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H21234 - 28. Multiple Choice
How many oxygens are in the following?
3Pb(OH)4
1
3
4
12
- 29. Multiple Choice
What are the numbers that you CANNOT change in a chemical equation?
Coefficients
Products
Reactants
Subscripts
- 30. Multiple ChoiceBalance this equation
_Zn+_HCl-->_ZnCl2 +_H21,1,2,11,1,1,21,2,1,12,1,1,1 - 31. Multiple ChoiceWhich problem is balanced?PbO2 + 2H2SO2 + H20 --> H2SO42Na + 2H2O --> 2NaOH + H2
- 32. Multiple Choice
What type of chemical reaction is this?
2Fe + 3O2 --> 2Fe2O3
synthesis
decomposition
single replacement
double replacement
- 33. Multiple Choice
What is meant by a chemical change?
it is when atoms are chemically altered by losing/gaining electrons
the ability of a substance to combine with or change into a different substance
a process in chemical equations where protons are changed into neutrons
- 34. Multiple Choice
Which of the following is NOT an indication that a chemical change has taken place?
light is produced
there is a change in color
a change from a solid to a liquid
- 35. Multiple Choice
In order for a chemical reaction to occur atoms or molecules must collide with enough energy so that...
bonds are broken
light is absorbed
energy is formed
protons change into neutrons
- 36. Multiple Choice
The arrow in a balanced equations means...
yields
adding
heat
energy
- 37. Multiple Choice
What is the expression for this balanced equation in words? Al2(SO4)3 + BaCl2 ----> AlCl3 + BaSO4
aluminum sulfide an barium chlorine yield aluminum chlorate and barium sulfate
aluminum sulfate and barium chloride yields aluminum chloride and barium sulfate
aluminum sulfide and barium chlorate yields aluminum III chloride and barium II sulfide
aluminum sulfite and barium chloride yields aluminum chlorate and barium sulfite
- 38. Multiple Choice
AB ----> A + B is the general form of a __ reaction
decomposition
synthesis
double replacement
single replacement
- 39. Multiple Choice
AX + BY -------> AY + BX is the general form for a ___ reaction.
decomposition
synthesis
single replacement
double replacement
- 40. 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 - Answer choicesTagsAnswer choicesTags