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WorksheetsFlashback - Changes, Molecules, Reactions
Total questions: 15
Worksheet time: 8mins
Which of the following would be an example of a chemical change?
Chopping up a log with an ax
Dissolving sugar in water
Burning a piece of paper
Melting an ice cube
Phase Changes are examples of
Chemical Changes
Physical Changes
All of the following are clues for a chemical change except
change in temperature
change in phase
color change
odor
Which of the following would be an example of a physical change?
condensation forming on a mirror while showering
an old iron gate rusting
baking a cake
frying an egg
What do the colored circles in this model represent
chemical bonds
compounds
electrons
atoms
What do the gray "sticks" in this model represent?
compounds
chemical bonds
protons
atoms
What is the chemical formula for this compound?
C6H12O6
H2O
C2H6O
NH3
How many molecules exist if the following chemical formula is used: 5H2SO4
two
four
five
seven
How many total atoms exist in the following chemical formula: 2H2O2
two
four
eight
twelve
How many oxygen atoms exist in the following chemical formula: 6CO2
two
four
eight
twelve
Which of the following would be considered a product of this equation?
C6H12O6
6CO2
6H2O
Sunlight
What statement describes the relationship bewteen the total atoms of products and reactants?
The products are double the reactants
The reactants are double the products
The products are less than the reactants
They are the same
What is the metric base unit for mass?
gram
pound
ounce
liter
What tool is primarily used to measure mass?
ruler
triple beam balance
graduated cylinder
overflow can
Which of these would be a reactant of this equation?
NH3
2NH3
3H2
3H2O
