NEW
Font size
WorksheetsChemical Equations - Brainpop
Total questions: 10
Worksheet time: 5mins
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 dry ice.
Salt and water mix to form salt water.
2H2 + O2 --> 2H20
In the equation shown, what are the reactants?
Hydrogen atoms
Hydrogen and oxygen molecules.
Water molecules
Ice crystals
Sulfuric acid is made of two hydrogen atoms (H2), one sulfur atom (S), and four oxygen atoms (O). What is the molecular formula?
2H4SO
H4S2O
H2SO4
H2S2O4
What is the best synonym for the word "stoichimetry"?
Combining atoms
Balancing chemical equations
Discovering new chemical formulas
Breaking the chemical bonds that hold molecules together
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 from the reactants.
The products usually have more atoms than the reactants.
The products are usually more toxic than the reactants.
H2 + O2 --> H2O
What is the problem with the chemical equation shown?
There is a missing hydrogen in the reactants.
There is a missing oxygen in the product.
There is an additional oxygen in the product.
There is an additional hydrogen in the reactants.
What is the easiest way to balance a chemical equation?
Trial and error
Using the periodic table
Complex algebra
Calculus
X + PO4 --> H3PO4
What reactant is missing from the equation shown?
One hydrogen atom
One phosphorus atom
Three hydrogen atoms
One oxygen atom
2Na + S2O3 -->
What is the product of the equation shown?
NaS2O3
NaS4O3
Na2S2O5
Na2S2O3
