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3. Chemical Reactions

Empirical Formula

3. Chemical Reactions

Empirical Formula

Open Question
What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass?
Open Question
What is the empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen?
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Multiple Choice
A metal (M) forms an oxide with the formula M2O. Identify the metal if the oxide is 16.99% O by mass.
Multiple Choice
How many atoms of oxygen are present in the empirical formula of calcium phosphate?
Open Question
Which of the following is already in its empirical formula?
Multiple Choice
Which of the following represents the empirical formula for the compound x4y8?
Multiple Choice
Which one of the following molecular formulas is also an empirical formula?
Multiple Choice
What is the empirical formula for $C_{2} H_{6}$ ?
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Multiple Choice
Which pair of compounds has the same empirical formula?
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?
Multiple Choice
What is the empirical formula of a compound that is composed of 72.4% Fe and 27.6% O by mass?
Open Question
How many atoms of oxygen are in the chemical formula 2Ca(ClO₂)₂?
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Multiple Choice
What mass (in g) of carbon is in a sample of acetone (CH3COCH3) that contains 6.02 x 10^23 atoms of hydrogen?
Multiple Choice
What is the empirical formula for a compound with the molecular formula C_6H_{12}Cl_2O_2?
Multiple Choice
Which one of the following is NOT an empirical formula?