Help me please ? 1007011. What is the percent composition of sulfur in ammonium sulfate? (NH,),SO,?a. 6.7%b. 24%C. 28%d. 32%12. Which of these is a base?a. LIOHb. BaCl,C. KId. KNO, 3 of 6100%13. The chemical equation shows methane burned in the presence of oxygen gas. What type of reaction does theequation represent?CH, + 20, CO, + 2 H,0a. Combinationb. Single replacementc. Double replacementd. Combustion14. The diagram represents the Lewis electron dot structure of a neutral element. Which element does the structuremost likely represent?a. Nab. MgC. CId. Ar15. A student fills a flask with 5 moles of nitrogen gas and then seals the flask. Which change will happen when thestudent 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%

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11. What is the percent composition of sulfur in ammonium sulfate? (NH,),SO,? a. 6.7% b. 24% C. 28% d. 32%

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter16: Acids And Bases

Section: Chapter Questions

Problem 68AP

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100%

Help me please ?

10070
11. What is the percent composition of sulfur in ammonium sulfate? (NH,),SO,?
a. 6.7%
b. 24%
C. 28%
d. 32%
12. Which of these is a base?
a. LIOH
b. BaCl,
C. KI
d. KNO,

3 of 6
100%
13. The chemical equation shows methane burned in the presence of oxygen gas. What type of reaction does the
equation represent?
CH, + 20, 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%

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