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Q 1/15
Score 0
In a chemical reaction, atoms are not created or destroyed, just rearranged, so total mass before = total mass after the reaction. What is this name of this phenomenon?
60
conservation of mass
preservation of mass
matter balance
conservative matter
Q 2/15
Score 0
When a metal forms a metal oxide, why does the mass increase?
60
atoms from gaseous nitrogen have been added
atoms from gaseous hydrogen have been added
atoms from gaseous oxygen have been removed
atoms from gaseous oxygen have been added
15 questions
Q.
In a chemical reaction, atoms are not created or destroyed, just rearranged, so total mass before = total mass after the reaction. What is this name of this phenomenon?
1
60 sec
Q.
When a metal forms a metal oxide, why does the mass increase?
2
60 sec
Q.
When an acid reacts with a metal, why does the mass decrease?
3
60 sec
Q.
What is relative formula mass?
4
60 sec
Q.
5
60 sec
Q.
6
60 sec
Q.
What does the ($g$) mean on a symbol equation?
7
60 sec
Q.
How can you tell when a symbol equation is balanced?
8
60 sec
Q.
9
60 sec
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10
60 sec
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11
60 sec
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12
60 sec
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13
60 sec
Q.
If the amount of solute in a solution is increased, what happens to its concentration?
14
60 sec
Q.
If the volume of water in a solution is increased, what happens to its concentration?
