Multiple Choice
When balancing the chemical equation for photosynthesis, 6 CO_2 + 6 H_2O → C_6H_{12}O_6 + 6 O_2, are there any leftover atoms after forming oxygen and glucose? Why or why not?
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2. Atoms & Elements
Law of Conservation of Mass
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According to Lavoisier's experiments, what did he discover that both rusting and burning have in common?
A
Both processes require the presence of carbon dioxide.
B
Both processes produce water as a product.
C
Both processes involve the combination of a substance with oxygen.
D
Both processes result in a decrease in the total mass of the system.
Verified step by step guidance1
Recall that Antoine Lavoisier is known as the 'Father of Modern Chemistry' and conducted experiments to understand combustion and rusting.
Understand that Lavoisier discovered that both rusting and burning involve a chemical reaction where a substance combines with oxygen from the air.
Recognize that this combination with oxygen is a key feature of oxidation reactions, which include both rusting (oxidation of iron) and burning (combustion).
Note that Lavoisier disproved the idea that mass decreases during these processes; instead, he showed that mass is conserved because oxygen from the air combines with the substance.
Therefore, the commonality between rusting and burning, according to Lavoisier, is that both involve the combination of a substance with oxygen.
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