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What is the empirical formula of a substance that is 53.5% C, 15.5% H, and 31.1% N by weight? a. CHN c. CH7N b. CHN d. CHN
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Expert answered|zyrilcallyxkyle|Points 15|
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Asked 5/17/2013 11:03:05 AM
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How many pi bonds are formed when sp hybridization occurs in ethene, CH? a. 0 c. 2 b. 1 d. 3
Weegy: Ethene H2C=CH2 Ethene has a double bond between the two carbon atoms. [ A double bond consists of a sigma bond, which is the end-to-end overlap of sp2 hybrid orbitals, and a pi bond, which is the side-to-side overlap of unhybridized p-orbitals. So there is 1 pi bond in ethene. B. 1 ] (More)
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Asked 5/17/2013 7:08:33 AM
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What is the geometric shape of nitrogen molecules and phosphorus molecules having four bonds? a. Trigonal c. Planar b. Tetrahedral d. None of the above
Weegy: Tetrahedral, assuming you mean the shape when a nitrogen or phosphorus atom is bonded to four other. (More)
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Asked 5/17/2013 7:11:33 AM
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shapes adjust so valence-electron pairs are as far apart as possible
Weegy: This is true. Valence electrons on on the outer most shell of an atom. (More)
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Asked 5/17/2013 7:44:37 AM
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Which of the following covalent bonds is the most polar? a. H—F c. H—H b. H—C d. H—N
Weegy: 1. Which bond is most polar? a. H-H |2.20 - 2.20| = 0.00 b. H-C |2.20 - 2.55| = 0.35 c. H-N |2.20 - 3.04| = 0.84 d. H-F |2.20 - 3.98| = 1.78 THE MOST POLAR e. [ H-Cl |2.20 - 3.16| = 0.96 Explanation: Polarity is based on differences in electronegativity. The numbers above are the electronegativity values assigned from Sargent-Welch's periodic table; the values may vary slightly from periodic table to periodic table. The greater the difference in electronegativity the greater the polarity. Even without these numbers in hand your professor/instructor should have gone over periodic trends: Electronegativity increases as you go up and to the right on the periodic table. Since all of the compounds are Hydrogen compounds the one with Fluorine (all the way up and to the right) would be a pretty safe guess. ] (More)
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Asked 5/17/2013 8:06:35 AM
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