3. Chemical Reactions

Empirical Formula

Open Question
What is the empirical formula for a compound if a sample contains 3.72 g of P and 21.28 g of Cl?
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Open Question
In [Cu(NH₃)₄]²⁺, the subscript 4 indicates which of the following?
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Open Question
What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?
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Open Question
Which number indicates the number of atoms of each element in a molecule of a substance
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Open Question
The elemental mass percent composition of malonic acid is 34.63% C, 3.87% H, and 61.50% O.
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Open Question
What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?
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Open Question
Use subscripts to represent the number of each type of atom or ion in a molecule.
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Open Question
What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass?
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Open Question
What is the empirical formula for a compound that is 43.6% phosphorus and 56.4% oxygen?
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Multiple Choice
A 0.2500 g sample of a compound known to contain carbon, hydrogen, and oxygen undergoes complete combustion to produce 0.3664 g of CO2 and 0.1500 g of H2O. What is the empirical formula of this compound? (Please use a 1 for any understood 1 that may be in)
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Multiple Choice
A 200.0 g sample of a compound contains 175.4 g of carbon and 24.54 g of hydrogen. What is the empirical formula of the compound?
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Multiple Choice
What is the empirical formula of the compound given the combustion data: 2.08 g CO₂, 1.28 g H₂O, and 4.77 g SO₃?
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Multiple Choice
A 45.2 mg sample of phosphorus reacts with selenium to form 131.6 mg of the selenide. Determine the empirical formula of phosphorus selenide.
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Multiple Choice
A compound consists of 36.33% carbon, 6.11% hydrogen, 21.20% nitrogen, and 36.31% oxygen. What is the empirical formula for this compound?
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Multiple Choice
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 g of nitrogen and 4.05 g of oxygen. Calculate the empirical formula of the compound.
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