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Environmental Engineering

Subject : engineering
Instructions:
  • Answer 40 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. If we divide the mass of a substance by its molecular weight - the result is the mass expressed in ________.






2. Vector sum of all bond dipoles in a structure






3. The mass of the atom measured in atomic mass units (1 proton=1 amu)






4. Number of protons in the nucleus






5. Natural waste






6. Change in enthalpy (H2-H1); the sum of the enthalpies of the reaction products minus the sum of the enthalpies of the reactants






7. The heat of reaction when water is assumed to remain in a vapor state; also called the net heat of combustion






8. Electrons are free to cycle around arrangements of atoms which are alternatively single- and double- bonded to one another. These bonds may be seen as a hybrid of a single bond and a double bond - each bond in the ring identical to every other






9. >100 -000; there is no natural decay cycle for them

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10. Wavelength </= hc/E






11. Mass (g)/molecular weight






12. Atoms containing the same number of protons but differing amounts of neutrons are __________ of each other






13. 6.02x10^23 molecules






14. Ortho: side by side - meta: one point away - forms an M - para: opposite each other






15. At standard STP (corresponding to __ degrees celsius and __ atm) - 1 mole of an ideal gas occupies ___ L and contains ___ molecules.






16. Groups linked by straight or branched carbon chains






17. Organic - carbonates (they're inorganic)






18. When change in H (enthalpy) is positive - heat is _____________ and the reaction is said to be _____________






19. Photochemical reaction; photochemical dissociation; or simply photolysis






20. For a photon to be able to cause photolysis - it must have at least as much energy as...






21. The number of moles of substance per liter of solution






22. The process of going from one phase to another






23. Inorganic






24. Ring structures: - enes (double bonds); - anes (single bonds)






25. 1 mole of a substance dissolved into enough water to make the mixture have a volume of 1 L.






26. First balance the chemical reaction - then for each species multiply the number of moles by the standard enthalpy to find total enthalpy






27. Organic matter - silt - clay - sand






28. 1 atm and 298 K (kj/mol)






29. The sum of the atomic weight of all the constituent atoms






30. Energy/mole






31. Unsaturated - has double bonds!






32. The heat released when water condenses to liquid form - also known as the gross heat of combustion






33. The more molecules of benzene - the more hydrophilic/hydrophobic the compound






34. Benzene; graphite






35. Molecules cannot store up energy from a series of photon encounters (waiting until enough energy is accumulated to cause photolysis...






36. H=U+PV; H2-H1=change in H=Q






37. E=hv=(hc)/wavelength where: E=energy of a photon (J) h=planck's constant (6.6x10^-34 Js) v=frequency (hertz - ie. cycles per second) c=speed of light (3.0x10^8 m/s) gamma=wavelength (m)






38. All single bonds






39. Circle (hexagonal if we'z gon get technical hurr) alkenes with double bonds at every other joint.






40. The flow of electrons goes to...