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WorksheetsChemical Equations
Total questions: 10
Worksheet time: 11mins
Which of the following is a chemical reaction?
Sodium and chlorine atoms bond to form salt molecules.
Ice melts to form water.
Carbon Dioxide freezes to form ice.
Salt and water mix to form salt water.
In the equation shown in the picture, what are the reactants?
Hydrogen atoms
Hydrogen and oxygen atoms
Water molecules
Ice crystals
Sulfuric Acid is made of two hydrogen atoms (H), one sulfur atom (S), and four oxygen atoms (O). What is the molecular formula?
2H4SO
H4S2O
H2SO4
H2S2O4
In the equation shown in the picture, what is the product?
Carbon atom
Oxygen atoms
Bonded Carbon AND Oxygen atoms
Two oxygen atoms
The chemical symbol "Ni" most likely represents:
Carbon
Antimony
Lead
Nickel
How do the products of chemical reactions compare to their reactants?
The products usually weigh more than the reactants.
The products often have completely different properties than the reactants.
The products usually have more atoms than the reactants.
The products are usually more toxic than the reactants.
What does the arrow in the picture represent, AND what is it called? (2 answers needed!)
The direction the atoms move.
Shows the chemical reaction has happened.
It is called an arrow.
It is called the yield sign.
What are the two reactants in this chemical equation? (2 answers needed!)
CH4 - Methane
CO2 - Carbon Dioxide
2 H2O - Water
2 O2 - Oxygen
Which reactant is missing from the equation shown?
One hydrogen atom
One phosphorus atom
Three hydrogen atoms
One oxygen atom
What are the two products in this chemical equation? (2 answers needed!)
CH4 - Methane
CO2 - Carbon Dioxide
2 H2O - Water
2 O2 - Oxygen
