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Science
9th -
10thgrade
Balancing Chemical Equations and Types of Reactions
16 questions
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- 1. Multiple Choice
What do you call the number in front of each molecule (Red) ?
Coefficient
Subscript
Reactant
Products
- 2. Multiple Choice
What do you call the number in front of each molecule (Red) ?
Coefficient
Subscript
Reactant
Products
- 3. Multiple ChoiceCxHy +O2 --> H2O + CO2DecompositionDouble replacementCombustionSingle Replacement
- 4. Multiple ChoiceThis pictures simulates what type of reaction?SynthesisDecompositionSingle ReplacementDouble Replacement
- 5. Multiple ChoiceSi + S8 --> Si2S4Synthesis (combination)DecompositionSingle replacementDouble replacement
- 6. Multiple ChoiceWhat is the left part of a chemical equation called?
H2 + O → H2OReactantsProductsYieldsChemical Equation - 7. Multiple Choice
Combustion reactions will always involve
Oxygen and a solid
Liquid nitrogen and heat
Oxygen and heat/energy
CO and H2O
- 8. Multiple Choice
What reaction has the following general formula:
AB --> A + B
Combination
Decomposition
Single Replacement
Double Replacement
Combustion
- 9. Multiple Choice
Combination
Decomposition
Single Replacement
Double Replacement
Combustion
- 10. Multiple ChoiceWhat coefficient should be used to make the following equation balanced?
N2+O2--> _NO1234 - 11. Multiple ChoiceWhat is the total number of atoms present in 5Na3PO4540558
- 12. Multiple Choice
The Law of Conservation of Matter
tells how many atoms of an element are contained in one molecule or formula unit.
the starting materials in a chemical reaction
the new substances that are formed in a chemical reaction
A law stating that atoms are not created or destroyed during a chemical reaction.
- 13. Multiple ChoiceWhich problem is balanced?
(Check ALL answers)PbO2 + 2H2SO2 + H20 --> H2SO42Na + 2H2O --> 2NaOH + H2 - 14. Multiple ChoiceHow many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H21234 - 15. Multiple ChoiceThe numbers needed to balance the equation are:2, 7, 6, 42, 1, 3, 23, 1, 1, 32, 3, 1, 3
- 16. Multiple ChoiceWhich number should go in the blank?
Mn + _ HNO3 → Mn(NO3)2 + H21230 - Answer choicesTagsAnswer choicesTags