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? (C = 12, H = 1, O = 16)
A compound contains 27.3% carbon and 72.7% oxygen by mass. What is its empirical formula? (C = 12, O = 16)
A compound contains 36.5% sodium, 25.4% sulfur, and 38.1% oxygen by mass. What is its empirical formula? (Na = 23, S = 32, O = 16)
A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is its empirical formula? (C = 12, H = 1, O = 16)
A compound contains 40% sulfur and 60% oxygen by mass. What is its empirical formula? (S = 32, O = 16)
A compound contains 53.3% oxygen and 46.7% silicon by mass. What is its empirical formula? (Si = 28, O = 16)
A compound contains 54.5% carbon, 9.1% hydrogen, and 36.4% oxygen by mass. What is its empirical formula? (C = 12, H = 1, O = 16)
A compound contains 85.7% carbon and 14.3% hydrogen by mass. What is its empirical formula? (Atomic masses: C = 12, H = 1)
A compound has the empirical formula C2H4O and a molar mass of 88 g/mol. What is its molecular formula?
A compound has the empirical formula C2H5 and a molar mass of 58 g/mol. What is its molecular formula?
A compound has the empirical formula C3H7O and a molar mass of 180 g/mol. What is its molecular formula?
A compound has the empirical formula C5H12 and a molar mass of 120 g/mol. What is its molecular formula?
A compound has the empirical formula CH2 and a molar mass of 56 g/mol. What is its molecular formula?
A compound has the empirical formula P2O5 and a molar mass of 284 g/mol. What is its molecular formula? (P = 31, O = 16)
A compound is found to contain 63.5% silver, 8.2% nitrogen, and 28.3% oxygen by mass. What is its empirical formula? (Ag = 108, N = 14, O = 16)
A sample of a compound contains 2.4 g of magnesium and 7.1 g of chlorine. What is the empirical formula? (Mg = 24, Cl = 35.5)
If the empirical formula of a compound is NO2 and its molar mass is 92 g/mol, what is its molecular formula? (N = 14, O = 16)
The empirical formula of a compound is CH and its molar mass is 78 g/mol. What is its molecular formula?
The empirical formula of a compound is CH2O and its molar mass is 180 g/mol. What is its molecular formula?
What is the empirical formula of a compound that contains 40% sulfur and 60% oxygen by mass? (Atomic masses: S = 32, O = 16)
