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How many carbon atoms are there in this molecule?
6
12
18
24
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How many hydrogen atoms are there in this molecule?
6
12
18
24
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How many oxygen atoms are there in this molecule?
6
12
18
24
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What is the chemical formula for this molecule?
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Which model shows a balanced equation?
a.
b.
c.
d.
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water
Si
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water
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oxygen
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water
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How many Hydrogen atoms are in NaCHCO3
1
2
3
4
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1
2
3
4
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1
2
3
4
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1
2
3
4
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1
2
3
4
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2
3
5
6
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1
2
3
6
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8
6
4
2
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8
6
4
2
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Which of the following is the best evidence for a chemical reaction?
gas bubbles
change in temperature
change in state
formation of a new substance