6. Calcium carbonate is a compound that can decompose into carbon dioxide and calcium oxide. Carbon dioxide, in turn, is made up of the elements carbon and oxygen. What needs to happen to a compound in order for it to be broken down into either elements or simpler compounds? A) The compound needs to undergo a chemical change. B) The compound needs to undergo a physical change C) The compound needs to be distilled in order to be reduced to simpler components. D) The compound needs to be filtered in order to be reduced to simpler components. E) None of the above. Color, odor, mass, density, volume, and freezing point are all examples of what type of property of substances? 7. A) Chemical B) Qualitative C) Quantitative D) Both qualitative and quantitative E) None of the above. 8. 8. Table salt, or sodium chloride, melts at 801 C and boils at 1413°C. When table salt is melted and then boiled, what type of change(s) occur(s)? A) Chemical and physical changes B) Physical change only C) Chemical change only. D) Neither chemical nor physical changes E) All of the above. 9. What is the First Law of Thermodynamies? A) Matter is neither created nor destroyed. B) The total energy in the universe is constant. C) All systems receive work from their surroundings. D) Matter can be converted to energy and vice versa All of the above. 10. Which of the following elements does NOT exist as 10. a diatomic form? A) Hydrogen B) Nitrogen C) Chlorine Oxygen E Carbon
Solution
6)
A) The compounds needs to undergo a chemical change
7)
D) Both qualitative and quantitative
8)
B) Physical change only
9)
B) Total energy in the universe is constant
10)
E) Carbon
.
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6- Calcium carbonate is a compound that can decompose into carbon diox.docx
1. 6. Calcium carbonate is a compound that can decompose into carbon dioxide and calcium oxide.
Carbon dioxide, in turn, is made up of the elements carbon and oxygen. What needs to happen to
a compound in order for it to be broken down into either elements or simpler compounds? A)
The compound needs to undergo a chemical change. B) The compound needs to undergo a
physical change C) The compound needs to be distilled in order to be reduced to simpler
components. D) The compound needs to be filtered in order to be reduced to simpler
components. E) None of the above. Color, odor, mass, density, volume, and freezing point are all
examples of what type of property of substances? 7. A) Chemical B) Qualitative C) Quantitative
D) Both qualitative and quantitative E) None of the above. 8. 8. Table salt, or sodium chloride,
melts at 801 C and boils at 1413°C. When table salt is melted and then boiled, what type of
change(s) occur(s)? A) Chemical and physical changes B) Physical change only C) Chemical
change only. D) Neither chemical nor physical changes E) All of the above. 9. What is the First
Law of Thermodynamies? A) Matter is neither created nor destroyed. B) The total energy in the
universe is constant. C) All systems receive work from their surroundings. D) Matter can be
converted to energy and vice versa All of the above. 10. Which of the following elements does
NOT exist as 10. a diatomic form? A) Hydrogen B) Nitrogen C) Chlorine Oxygen E Carbon
Solution
6)
A) The compounds needs to undergo a chemical change
7)
D) Both qualitative and quantitative
8)
B) Physical change only
9)
B) Total energy in the universe is constant
10)
