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Physical versus Chemical Changes and Conservation
Worksheet
Grade Level
Grade 8
8.21 Physical versus Chemical Changes and Conservation
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How does this equation show conservation of atoms?
A
It shows conservation only if water is liquid.
B
It destroys hydrogen atoms because H2O has fewer H atoms.
C
It creates extra oxygen atoms because O2 has two atoms.
D
It has 4 H atoms and 4 O atoms on both sides, so atoms are rearranged but conserved.
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