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WorksheetsChanging Matter Review
Total questions: 27
Worksheet time: 23mins
The number of atoms on my reactants side, should equal the number atoms on my products side.
True
False
Which of the following models best demonstrates the law of conservation of mass?
If 100 g of potassium reacts with 24 g of oxygen, what is the mass of potassium oxide produced?
. 76 g
. 100 g
124 g
124,000 g
Is this equation balanced?
P4 + 3O2 --> 2P2O3
Yes
No
Is this chemical equation balanced?
2Mg + 3O2 ---> 2MgO
Yes
No
Which chemical reaction supports the law of conservation of mass?
Al+O2→Al2O3
N2+H2→NH3
2Na+Cl2→2NaCl
Cu+HCl→CuCl2+H2
Which chemical reaction supports the law of conservation of mass?
Fe+O2→Fe2O3
H2SO4+Ca(OH)2→CaSO4+2H2O
(NH4)2CO3→2NH3+CO2+H2O
2KClO3→2KCl+3O2
Which chemical reaction supports the law of conservation of mass?
C2H6+O2→CO2+H2O
Ca(OH)2+CO2→CaCO3+H2O
(NH4)2CO3→2NH3+CO2+H2O
Zn+2HCl→ZnCl2+H2
A chemical change forms new substances
True
False
A physical change results in properties such as size, shape, or state of matter changing
True
False
What is a key characteristic of chemical changes?
The shape of matter changes
The size of matter changes
The formation of new substance
The state of matter changes
The BEST way to identify a physical change is:
Check if chemical bonds are broken
See if the original substance remains the same
Look for new substance formation
Test if heat is produced
ALWAYS indicates a chemical change:
A precipitate formation
Change in color
Change in size or shape
Change in state of matter
melting
chemical change
physical change
breaking
chemical
physical
burning
chemical
physical
baking
chemical
physical
molding
chemical
physical
rusting
chemical
physical
cooking
chemical
physical
freezing
chemical
physical
rotting/decomposing/souring
chemical
physical
evaporating
chemical
physical
grinding
chemical
physical
formation of rain
Physical
Chemical
exploding/combusting
Physical
Chemical
