CHEM 111 Lecture Notes - Molar Mass, Lewis Structure, Octet Rule
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Mass of c = 12. 01 / 44. 01 x 1. 5 g. Mass of h = 1. 008 / 18. 016 x 0. 41 g. Mass of o = 1. 000 g 0. 409 g 0. 046 g. Moles of c = 0. 409 g x 1 mol / 12. 01 g. Moles of h = 0. 046 g x 1 mol / 1. 008 g. Moles of o = 0. 545 g x 1 mol / 16 g. Compare to molar mass (3 x 12. 01) + (4 x 1. 008) + (3 x 16) = 88. Pauling"s scale puts f at the top with a value of 4. 0. Electrons pulled by larger zeff smaller size. Generally increases as you move up and to the right. Way to visualize bonding relationships in a molecule. Typically, this atom will need to make the most bonds. Draw single bond between central atom and any atoms surrounding it. Use remaining electrons to fill each atom"s octet. Valence electrons 5 + 7(3) = 26.
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