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Molecular Formula

Molecular Formula. Review Empirical Formula. 39.7% carbon, 1.7% hydrogen, 58.7% chlorine. Things to Remember. Final step Subscripts Below .2 round to whole # .25 .33 .5 .66 .75 Above .8 round up. Molecular Formula. What you need to have: Empirical formula or the means to find it

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Molecular Formula

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  1. Molecular Formula

  2. Review Empirical Formula • 39.7% carbon, 1.7% hydrogen, 58.7% chlorine

  3. Things to Remember • Final step Subscripts • Below .2 round to whole # • .25 • .33 • .5 • .66 • .75 • Above .8 round up

  4. Molecular Formula • What you need to have: • Empirical formula or the means to find it • Molecular or experimental molar mass • How to Calculate • Calculate molar mass of empirical formula • Divide molecular mass by empirical mass • Multiply factor (step 2) by subscripts in empirical formula

  5. CHCl, the experimental molar mass is 179 g/mol.

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