1.)Which of the following are chemical changes?
A.)Boiling Of Water
B.)Melting A Cube of ice
C.)Dissolving 10 grams of salt in water
D.)Splitting water into hydrogen and oxygen
2) What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen? (1 point)
A.)14.0g
B.)16.0g
C.)18.0g
D.)20.0g
3) Why are plastic building blocks good for modeling molecules? (1 point)
A.)They come in thousands of shapes and sizes.
B.)They can be combined in many different ways.
C.)They are rigid and do not easily separate.
D.)There are as many different colors as there are atoms.
4. What did Antoine Lavoisier’s experiments demonstrate? (1 point)
A.)Atoms always split into pairs during a chemical change.
B.)Mass is neither lost nor gained during a chemical change.
C.)Matter can be created during a chemical change.
D.)Energy is neither lost nor gained during a chemical change.
D
C
B
B
ARE THEY CORRECT?
7 answers
2. 18.0g
3. They can be combined in many different ways.
4. Mass is neither lost nor gained during a chemical change.
100%
trust me the real answer's are
d
b
c
d
The answers are
D - splitting water into hydrogen. . and oxygen
C - 18.0 g
B - they can be rigid and do not
easily separate
B - mass is neither lost nor gained
during a chemical change
1 answer