13. The chemical equation shows methane burned in the presence of oxygen gas. What type of reaction does the equation represent? CH, +2 0, CO, + 2 H,0 a. Combination b. Single replacement c. Double replacement d. Combustion 14. The diagram represents the Lewis electron dot structure of a neutral element. Which element does the structure most likely represent? a. Na b. Mg C. CI d. Ar 15. A student fills a flask with 5 moles of nitrogen gas and then seals the flask. Which change will happen when the student warms the flask? a. The temperature will decrease. b. The pressure inside the flask will increase. c. The volume inside the flask will decrease. d. The molar mass of the gas will increase. 16. What is the appropriate percent composition of phosphorus in phosphoric acid H,PO,? a. 29.5% b. 31.6% c. 65.3% d. 98.0%
13. The chemical equation shows methane burned in the presence of oxygen gas. What type of reaction does the equation represent? CH, +2 0, CO, + 2 H,0 a. Combination b. Single replacement c. Double replacement d. Combustion 14. The diagram represents the Lewis electron dot structure of a neutral element. Which element does the structure most likely represent? a. Na b. Mg C. CI d. Ar 15. A student fills a flask with 5 moles of nitrogen gas and then seals the flask. Which change will happen when the student warms the flask? a. The temperature will decrease. b. The pressure inside the flask will increase. c. The volume inside the flask will decrease. d. The molar mass of the gas will increase. 16. What is the appropriate percent composition of phosphorus in phosphoric acid H,PO,? a. 29.5% b. 31.6% c. 65.3% d. 98.0%
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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13. The chemical equation shows methane burned in the presence of oxygen gas. What type of reaction does the
equation represent?
CH, + 2 0, CO, +2 H,0
a. Combination
b. Single replacement
c. Double replacement
d. Combustion
14. The diagram represents the Lewis electron dot structure of a neutral element. Which element does the structure
most likely represent?
a. Na
b. Mg
с. СI
d. Ar
15. A student fills a flask with 5 moles of nitrogen gas and then seals the flask. Which change will happen when the
student warms the flask?
a. The temperature will decrease.
The pressure inside the flask will increase.
c. The volume inside the flask will decrease.
d. The molar mass of the gas will increase.
b.
16. What is the appropriate percent composition of phosphorus in phosphoric acid H,PO,?
a. 29.5%
b. 31.6%
c. 65.3%
d. 98.0%
Transcribed Image Text:17. An engine cylinder contains .25 L of gas at a pressure of 1 atm. As the engine runs, the gas in compressed to
.025 L. What is the new pressure of the gas?
a. .10 atm
b. 10.0 atm
C. 25 atm
d. 250 atm
18. What is the approprste mass of 1.5 moles of ammonia NH,?
a. 10.0 grams
b. 15.0 grams
c. 17.0 grams
d. 25.5 grams
19. What is the total number of electrons in all s orbitals
a neutral atom of phosphorus?
a.
2.
b. 4
C.
6.
d.
8
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