Question
Asked Oct 6, 2019
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4. Oxides of titanium are used as pigments. A compound containing only titanium and
oxygen is 66.6% titanium by mass. The molar mass of the compound is 144 g/mol.
Determine (a) and (b). Show your work
(a) empirical formula
(b) molecular formula
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4. Oxides of titanium are used as pigments. A compound containing only titanium and oxygen is 66.6% titanium by mass. The molar mass of the compound is 144 g/mol. Determine (a) and (b). Show your work (a) empirical formula (b) molecular formula

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Expert Answer

Step 1

Given:

Compound contains only titanium and oxygen.

Percent mass of titanium = 66.6 %.

Percent mass of oxygen = 100% - 66.6% = 33.4 %.

Molar mass of oxygen = 16 g/mol.

Molar mass of titanium = 47.867 g/mol.

Molar mass of compound = 144 g/mol.

Conversion of mass percent to gram:

Since we are having mass percent, it is convenient to use 100 g of the compound as the starting material. Thus, in the 100 g of sample of above compound 66.6 g of titanium and 33.4 g of oxygen.

Step 2

Calculation for number of titanium:

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mass number of moles molar mass 66.6 g number of moles 47.867 g/mol number of moles = 1.3914 moles

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Step 3

Calculation for numb...

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mass number of moles molar mass 33.4 g number of moles 16 g/mol number of moles 2.0875 moles

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