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WorksheetsIPC Unit 5
Total questions: 33
Worksheet time: 55mins
How many valence electrons does carbon have?
4
5
6
7
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.
Fe + S --> FeS
N2+O2--> _NO
(Check ALL answers)
Mg + __HCl ---> MgCl2 + H2
2H2 + O2 --> 2H2O
4Fe + 3O2 --> 2Fe2O3
NaHCO3 --> Na2CO3 + H2O + CO2
Chemical Equation
A representation of a chemical reaction
the starting materials in a chemical reaction
the new substances that are formed in a chemical reaction
tells how many atoms, molecules, or formula units take part in a reaction
Balance the following equation:
___ Mg+ ___ O2→___ MgO
1, 1, 3
2, 1, 2
1, 2, 1
2, 2, 2
NH3 + HCl → NH4Cl
Al(OH)3 → Al2O3 + H2O
In an endothermic reaction, energy is _________.
absorbed
released
_____ reactions usually feel hot!
endothermic
exothermic
____ reactions usually feel cold.
endothermic
exothermic
A school bus burns gasoline while delivering students to school.
exothermic
endothermic
