Worksheetschemical reactions and equations
Total questions: 11
Worksheet time: 11mins
Why must chemical equations be balanced?
So that the equation doesn't explode
The reaction won't happen until it is balanced
Based on the Law of Conservation of Matter, matter cannot be created or destroyed.
Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e
HgO --> Hg + O2
H2 + Cl2 --> HCl
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO
Mg and O2
MgO
Mg and MgO
O2 and MgO
The smallest particle of an element; made of electrons, protons, and neutrons
Atoms
Elements
Molecules
Products
A substance produced during a chemical reaction
Product
Reactant
Properties
a copper penny turning greenish after a few years.
Physical change
Chemical change
Anything that has mass and takes up space is considered
matter
energy
chemistry
endothermic
Which of the following is a balanced chemical equation?
H2O2 → H2O + O2
2Fe2O3 + 3C → 4Fe + 3CO2
SO2 + O2 + 2H2O → 4H2SO4
2Mg + HCl → MgCl2 + H2
