Chemistry, 01.12.2020 08:20 mamatonya5p5jl11
Review | Constants | Periodic Table Average Bond Dissociation Energies, D (kJ/mol) H−H 436 C−H 410 N−H 390 O−F 180 I−I 151 H−C 410 C−C 350 N−C 300 O−Cl 200 S−S 310 H−F 570 C−F 450 N−F 270 O−Br 210 S−Cl 250 H−Cl 432 C−Cl 330 N−Cl 200 O−I 220 S−Br 210 H−Br 366 C−Br 270 N−Br 240 O−N 200 S−S 225 H−I 298 C−I 240 N−N 240 O−O 180 H−N 390 C−N 300 N−O 200 F−F 159 H−O 460 C−O 350 O−H 460 Cl−Cl 243 H−S 340 C−S 260 O−C 350 Br−Br 193 Multiple covalent bonds C=C 728 C≡C 965 C=O 732 O−O 498 N≡N 945 Part A Use the bond dissociation energies from the table above to calculate an approximate ΔH∘ in kilojoules for the reaction of acethylene with hydrogen to yield ethane. HC≡CH(g)+2H2(g)→CH3CH3(g)
Answers: 1
Chemistry, 21.06.2019 20:50
Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread
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Chemistry, 21.06.2019 22:30
The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.
Answers: 2
Chemistry, 21.06.2019 22:30
1. combine iron and copper (ii) sulfate solution. (hint: iron will form the iron (iii) ion) fe + cuso4 → 2. combine lead (ii) nitrate and potassium iodide solutions. pb(no3)2+ kl → 3. combine magnesium metal and hydrochloric acid solution. mg + hcl → 4. electrolysis (splitting) of water. h2o → 5. burning magnesium. mg + o2 →
Answers: 3
Review | Constants | Periodic Table Average Bond Dissociation Energies, D (kJ/mol) H−H 436 C−H 410 N...
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