WorksheetsChemical Equations and Conservation of Mass
Total questions: 16
Worksheet time: 12mins
In a chemical equation, what are the substances on the left side of the arrow called?
yields (results in)
products
reactants
chemicals
In a chemical equation, what are the substances on the right side of the arrow called?
yields (results in)
products
reactants
chemicals
In a chemical equation, what does the arrow mean?
yields (results in)
products
reactants
chemicals
What is the term for the starting materials of a chemical reaction?
matter
reactants
products
chemical equation
What is the term for the end materials of a chemical reaction?
matter
reactants
products
chemical equation
In this chemical equation what does the 3 before the H2 mean?
3 hydrogen (H) atoms
3 hydrogen (H2) molecules
3 ammonia (NH3) molecules
the reaction occurs 3 times
In this chemical equation what does the 2 after the N (in N2) mean?
2 nitrogen (N) atoms
2 nitrogen (N2) molecules
2 ammonia (NH3) molecules
the reaction occurs 2 times
In this reaction, how many molecules of nitrogen (N2) are present in the reactants?
1
2
3
4
In this reaction, how many molecules of hydrogen (H2) are present in the reactants?
1
2
3
4
In this reaction, how many molecules of ammonia (NH3) are formed?
1
2
3
4
What would be the correct way to "read" this equation?
nitrogen and hydrogen make ammonia
2 nitrogens and 3 hydrogens create 2 ammonias
you can make ammonia by putting nitrogen and hydrogen together
one molecule of nitrogen plus three molecules of hydrogen yields 2 molecules of hydrogen
In this reaction, how many atoms of nitrogen are found on the reactant side of the equation?
1
2
4
6
In this reaction, how many atoms of nitrogen are found on the product side of the equation?
1
2
4
6
In this reaction, how many atoms of hydrogen are found on the reactant side of the equation?
1
3
6
8
In this reaction, how many atoms of hydrogen are found on the product side of the equation?
1
3
6
8
What is true about the number of atoms of each element found on the left (reactants) and right (products) sides of a chemical equation?
they are always equal
there are always more reactants than products
there are always more products than reactants
they are different for different chemical reactions
