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Kidphresh93
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1. a. Suppose you know that a compound is 11.2% H and 88.8% O. What information do you need to determine the empirical formula?
b. What additional information do you need to determine the molecular formula?
2. Isooctane has the molecular formula C8H18. What is its empirical formula?
3. What information do you need to calculate the percentage composition of CF4?
4. Determine the empirical formula.
a. The analysis of a compound shows that it is 9.2% B and 90.8% Cl.
b. An analysis shows that a compound is 50.1% S and 49.9% O.
c. The analysis of a compound shows that it is 27.0% Na, 16.5% N, and 56.5% O.
5. The experimental molar mass of the compound in item 4b is 64 g/mol. What is the compound's molecular formula?
Using a Chemical Formula Determine Percentage Composition
70. Determine the percentage composition of the following compounds:
a. ammonium nitrate, NH4NO3, a common fertilizer
b. tin(IV) oxide, SnO2, an ingredient in fingernail polish
c. YBa2Cu3O7, a superconductor
71. What percentage of ammonium carbonate, (NH4)2CO3, an ingredient in smelling salts, is the ammonium ion, NH+4?
72. Some antacids use compounds of calcium, a mineral that is often lacking in the diet. What is the percentage composition of calcium carbonate, a common antacid ingredient?
73. Determine the percentage composition of ammonium oxalate, (NH4)2C2O4
b. What additional information do you need to determine the molecular formula?
2. Isooctane has the molecular formula C8H18. What is its empirical formula?
3. What information do you need to calculate the percentage composition of CF4?
4. Determine the empirical formula.
a. The analysis of a compound shows that it is 9.2% B and 90.8% Cl.
b. An analysis shows that a compound is 50.1% S and 49.9% O.
c. The analysis of a compound shows that it is 27.0% Na, 16.5% N, and 56.5% O.
5. The experimental molar mass of the compound in item 4b is 64 g/mol. What is the compound's molecular formula?
Using a Chemical Formula Determine Percentage Composition
70. Determine the percentage composition of the following compounds:
a. ammonium nitrate, NH4NO3, a common fertilizer
b. tin(IV) oxide, SnO2, an ingredient in fingernail polish
c. YBa2Cu3O7, a superconductor
71. What percentage of ammonium carbonate, (NH4)2CO3, an ingredient in smelling salts, is the ammonium ion, NH+4?
72. Some antacids use compounds of calcium, a mineral that is often lacking in the diet. What is the percentage composition of calcium carbonate, a common antacid ingredient?
73. Determine the percentage composition of ammonium oxalate, (NH4)2C2O4