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April 23, 2014

April 23, 2014

Posted by **Nikki** on Saturday, November 17, 2012 at 6:15am.

Identify the geometry around each carbon atom. a)trigonal pyramidal b)bent c)tetrahedral d)linear e)trigonal planar Is the compound polar or nonpolar?

- Chemistry -
**DrBob222**, Saturday, November 17, 2012 at 6:34pmUse PV = nRT to solve for n = number of mols. Then n = grams/molar mass. You know grams and n, solve for molar mass.

Take 100 g sample which gives

13.068 g C

86.932 g Br.

Convert grams to mols

mols C = 13.068/atomic mass C.

mols Br = 86.932/atomic mass Br.

Find the ratio of C to Br with the smaller value being 1.00. The easy to do this is to divide the smaller value by itself; divide the other number by the same small number to find empirical formula which will be CxBry.

empirical mass x z = molar mass(from above)

Solve for x which becomes

(empirical formula)x = molecular formula.

Post your work if you get stuck.

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