Use the Rothenberger Calculator for these problems. Then round off and enter your answer to 4 significant figures.
1. Calculate the formula weight and the percentage composition for each of the following molecular formulas.
2. Calculate the molecular formula, the formula weight, and the percentage composition for each of the following compounds.
3. Use the following elemental analyis data to calculate the empirical formula of each unknown.
a. C, 68.84%; H, 4.96%; O, 26.20%
b. C, 35.28%; H, 8.90%; F, 55.82%
c. C, 38.69%; H, 9.76%; O, 51.55%
d. C, 59.98%; H, 5.04%; N, 34.98%
4. The formula weights of the four unknowns in Exercise 3 are 122.13, 34.04, 62.08, and 80.10, respectively. What are the molecular formulas for each of those compounds?
a.
b.
c.
d.
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