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# Molecular Formulas of Different Compounds

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1. A compound containing titanium (Ti) and chlorine is analyzed by converting all the titanium into 1.20g of TiO2 and all the chlorine into 6.45g of AgCl. What is the simplest formula for the original compound?

2. Estrone is a female sex hormone that is known to contain 80.0% carbon, 8.2% hydrogen, and the remainder oxygen. If 793mL of estrone is found to have a mass of 4.97g at 0.90atm and 200oC, find the molecular formula for estrone Write the correct formula for each of the following ions.

3. Farmers use fertilizers mainly to replace depleted nutrients in the soil. Liquid ammonia and ammonium nitrate are two substances that are used to replace essential nitrogen in the soil. Based on the percentage of nitrogen by mass, which of these two chemicals would be the better fertilizer? Assume that the cost per kilogram of each chemical is about the same.

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#### Solution Preview

1.A compound containing titanium (Ti) and chlorine is analyzed by converting all the titanium into 1.20g of TiO2 and all the chlorine into 6.45g of AgCl. What is the simplest formula for the original compound?

Convert both these masses into moles through the molar masses:

1.20 g TiO2 (1 mol / 236.36 g TiO2) = 0.00508 moles TiO2
6.45 g AgCl ( 1 mol / 143.34 g AgCl) = 0.0450 moles AgCl

Now for every mole of compound there is one mole of Ti and one mole of Cl so we have:
0.0508 moles Ti
0.0450 moles Cl

We like to round these moles to whole numbers
0.0450 / 0.0450 = 1
0.0508 / 0.0450 = 1.129
1.129 * 7 = 9

&#61664; Ti 9 Cl ...

#### Solution Summary

The solution calculates molecular formulas for different chemical compounds.

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