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Chemical Formulas - DOC

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Chemical Formulas - DOC Powered By Docstoc
					                        Introduction to Chemical Formulas

Atoms:

Molecules:

Subscript:

Coefficient:

Radicals: acts as if connected – usually in parenthesis (OH)

What is the significance of capital and lowercase letters?

Problem: Can you look at a chemical formula and identify all atoms
present? Can you identify all atoms in a molecule?

Example:
1.   2NH3
     a. Is thi s a molecule or an atom?
     b. How do you know?
     c. Are there any coefficients in thi s formula?
     d. Are there any subscripts in thi s formula?
     e. Are there any radicals in this formula?
     f. How many nitrogen atoms are present in this molecule?
     g. How many hydrogen atoms are present in thi s molecule?
     h. How many total atoms are present in this molecule?
     i. Draw all atoms in thi s molecule.


2.   C3H5(OH)3
     a. Is thi s a molecule or an atom?
     b. How do you know?
     c. Are there any coefficients in thi s formula?
     d. Are there any subscripts in thi s formula?
     e. Are there any radicals in this formula?
     f. How many carbon atoms are present in thi s molecule?
     g. How many hydrogen atoms are present in thi s molecule?
     h. How many oxygen atoms are present in thi s molecule?
     i. How many total atoms are present in this molecule?
     j. Draw all atoms in thi s molecule.

Problems: Please follow directions
1. (NH 4)2CO3
2. CO2
3. Mg(NO3)2
4 3KClO4
5. 4Ba(OH)2
6. Cu2Cr2O7

				
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