Answers by Doug Lee
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Answers by Doug Lee

Answers by Doug Lee
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Consider the combustion reaction, 2C4H2+5O 2--->4 CO2+2H2O where C2 H2 Hf = 227.4 kJ/mol), CO2 (Hf = –393.5 kJ/mol), and H2 O (Hf = –241.82 kJ/mol). What is the enthalpy of the reaction? –2,512.4 kJ –1,
answered Apr 18, 2018
1 vote
38.5k views
Studies of new product launches indicate that about __________ percent of the products fail.
answered Mar 8, 2018
2 votes
135k views
Write 13 tens as hundreds and tens
answered Dec 22, 2017
2 votes
88.5k views
Which two structures would provide a positive identification of an animal cell under a microscope A. Chromatin, chloroplast B. Flagellum,lysosomes C. Ribosomes,lysosomes D. Nucleus, vesicle
answered Dec 9, 2017
2 votes
196k views
If 9i is a root of the polynomial function f(x), which of the following must also be a root of f(x)? A.-9iB.-1/9i C.1/9i D.9-i
answered Jun 11, 2017
4 votes
214k views
Which organization would work best for a crime scene report? a. spatial order b. chronological order c. order of importance d. logical order
answered May 11, 2017
3 votes
58.1k views
Many invertebrates die during the earlier stages of their life cycle because they are a major part of the food chain. a. True b. False
answered Apr 26, 2017
2 votes
185k views
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