Chemistry, 13.11.2019 06:31 wolffee895
Question 1: which of the following statement is false about conjugated systems?
a. a conjugated system is more stable than an unconjugated system.
b. the s-trans isomer is favored over the s-cis isomer.
c. a conjugated system has multiple resonance structures.
d. a conjugated system can only contain two alkenes
question 2: which statement concerning alkenes is false?
a. a trans alkene releases less heat upon hydrogenation than a cis alkene.
b. a cumulated diene is less stable than an isolated diene.
c. multiple products can always form when treated a conjugated diene with hbr.
d. conjugated systems arise only between sp2-hybridized atoms.
e. conjugated double bonds involve unhybridized p-orbitals aligned with each other
Answers: 3
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About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?
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Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.
Answers: 3
Question 1: which of the following statement is false about conjugated systems?
a. a c...
a. a c...
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