Introductory Chemistry: An Active Learning Approach
6th Edition
ISBN:9781305079250
Author:Mark S. Cracolice, Ed Peters
Publisher:Mark S. Cracolice, Ed Peters
Chapter7: Chemical Formula Relationships
Section: Chapter Questions
Problem 41E
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Can you solve them both please
Transcribed Image Text:A sample of ammonia has a mass of 98.5 g. How many
molecules are in this sample?
O A. 5.78 molecules
B. 5.93 1025 molecules
C. 1.95 10-15 molecules
D. 3.48 1024 molecules
O E. 1.04 ´ 1023 molecules
Transcribed Image Text:Using the following data reactions:
DH° (kJ)
H2(g) + Cl2(g) ® 2HCI(g) -184
H2g) ® 2H(g)
Cl2(g) ® 2CI(g)
calculate the energy of an H-CI bond.
O A. 855 kJ
432
239
B. 244 kJ
C. 92 kJ
D. 428 kJ
O E. 487 kJ
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