Empirical and Molecular Formula Calculations
Chemistry ⇒ Stoichiometry and Chemical Calculations
Empirical and Molecular Formula Calculations starts at 10 and continues till grade 12.
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A compound contains 21.7% carbon, 9.6% hydrogen, and 68.7% oxygen by mass. What is its empirical formula?
A compound contains 36.5% sodium, 25.4% sulfur, and 38.1% oxygen by mass. What is its empirical formula?
A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is its empirical formula?
A compound contains 52.2% carbon, 13.0% hydrogen, and 34.8% oxygen by mass. What is its empirical formula?
A compound contains 54.5% carbon, 9.1% hydrogen, and 36.4% oxygen by mass. If its molar mass is 88 g/mol, what is its molecular formula?
A compound contains 85.7% carbon and 14.3% hydrogen by mass. What is its empirical formula?
A compound has a molar mass of 180 g/mol and an empirical formula of CH₂O. What is its molecular formula?
A compound has an empirical formula of C₂H₅ and a molar mass of 58 g/mol. What is its molecular formula?
A compound has an empirical formula of CH and a molar mass of 78 g/mol. What is its molecular formula?
A compound has an empirical formula of CH₂O and a molar mass of 150 g/mol. What is its molecular formula?
A compound has an empirical formula of NO₂ and a molar mass of 92 g/mol. What is its molecular formula?
A compound is found to contain 63.5% silver, 8.2% nitrogen, and 28.3% oxygen by mass. What is its empirical formula?
A sample of a compound contains 2.70 g of aluminum and 4.80 g of oxygen. What is the empirical formula of the compound?
Define empirical formula.
Explain why the empirical formula is important in chemistry.
