Chemistry Homework Help: Answers & Questions Page 53

• What would be the product of 1-bromopropane with Mg in diethyl ether??

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• What does it mean to be enantiomerically pure?

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• What is the frequency of a light source that has a wavelength of 807 nm? What is the energy of this wave?

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• The individual BF bond are polar but still BF3 is a nonpolar molecule .how?

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• With which group of elements is magnesium most reactive?

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• Inert gases have zero valency why?

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• In a heating curve, when is the temperature constant?

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• What is the electron configuration of calcium?

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• Determine vapor pressure of solution at ##55^@"C"## that contains 34.2g ##NaCl## in 376mL of water? the vapor pressure of pure water at ##55^@"C"## is 118.1 torr.

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• Which one of the following ions is iso-electronic with krypton? (a) ##Ca^(2+)##, (b) ##K^+## (c) ##I^-## (d) ##Mg^(2+)## (e) ##Sr^(2+)##

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• What the molar mass of calcium phosphate?

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• How do you find the molar mass of argon?

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• What causes gas pressure?

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• What volume of water would you add to 15.00 mL of a 6.77 M solution of nitric acid in order to get a 1.50 M solution?

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• How did J.J. Thomson discover the electron?

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• In chemistry, what do the delta symbols Δ and δ stand for?

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• What is the formula for the conjugate base for HSO3?

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• The melting point of silver is 962°C. How do you express this temperature in kelvins?

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• Why is heat capacity an extensive property?

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• How many resonance structures can be drawn for ##"PO"_4^(3-)##?

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• A titanium cube contains 2.6*10^23 atoms. The density of titanium is 4.50 g/cm^3. What is the edge length of the cube?

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• How can I find partial pressure given moles?

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• What is uranium's electron configuration?

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• What is the molecular geometry of the CS2 molecule?

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• Which of the following compounds is insoluble in water? (a) ##"PbSO"_4## (b) ##"AgCl"## (c) ##"CaCO"_3## (d) All of the above

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• What are Hund's Rule, Pauli Exclusion Principle, and Aufbau Principle? How are they different? How are they related?

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• How to calculate the maximum kinetic energy of photo emitted electrons if uv radiation has a wavelength of 275 nm?

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• The atomic number of Uranium is 92 and its atomic mass is 238. How many neutrons does the most common isotope of Uranium have?

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• What major product results when 2-bromo-2-methylbutane is treated with sodium ethoxide?

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• Which parts of acetylsalicylic acid are rigid?

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• An aqueous solution of ##"HCl"## contains 36% ##"HCl"## by mass. The density of the solution is 1.189 g/ml. What is the mole fraction of ##"HCl"## in the solution ? What is the molality of ##"HCl"## in the solution ? Show all calculations

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• Why is NH3 a lewis base and BCl3 a lewis acid?

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• How do you recognize a double displacement reaction?

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• What is an f orbital?

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• How many properties of matter are there?

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• The half-life of plutonium-239 is 24,100 years. Of an original mass of 100g, how much plutonium-239 remains after 96,440 years?

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• What is the electron configuration of argon?

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• When HCl(aq) is titrated with NH3(aq), the pH at the equivalence point is (a) less than 7.0 (b) equal to 7.0 (c) greater than 7.0. ?

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• Why is the symbol of silver is Ag and not Si?

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• How do isotopes relate to average atomic mass?

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• How did we come to know the tetrahedral shape of methane, as it is gas and we can't look at its molecular level through microscope or any kind of such instrument? How were structures of other compounds, such as Nacl, determined?

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• How do you draw a Newman projection for hexane while sighting down ##C_2-C_3##?

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• Why does Sodium lose an electron and attains +1 charge?

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• What is the molar mass of methane, ##CH_4##?

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• What is vant Hoff equation ?

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• What is the hybridization of H2O?

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• In what order are the elements of the periodic table arranged?

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• What is the difference between alkanes, alkenes and alkynes?

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• How many hybrid orbitals are there in HNO3?

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• Why Polystyrene is foamy?

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