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MOLECULAR FORMULAS

MOLECULAR FORMULAS. Empirical Formulas – Simplest whole number ratio of atoms in a compound Molecular formula – A chemical formula that shows the actual number and kinds of atoms present in a compound. Which pair of molecules has the same empirical formula

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MOLECULAR FORMULAS

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  1. MOLECULAR FORMULAS

  2. Empirical Formulas – • Simplest whole number ratio of atoms in a compound • Molecular formula – • A chemical formula that shows the actual number and kinds of atoms present in a compound

  3. Which pair of molecules has the same empirical formula • A) C2H4O2 C6H12O6 or • B) NaCrO4 Na2Cr2O7

  4. Find the molecular formula for each of the following compounds given its empirical formula and molar mass • ethylene glycol (CH3O), used in antifreeze, molar mass of 62g/mol • P-dichlorobenzene (C3H2Cl), mothballs, molar mass of 147g/mol.

  5. You find that 7.36 g of a compound has decomposed to give 6.93 g of oxygen. The only other element in the compound is hydrogen. If the molar mass is 34.0g.mol, what is the molecular formula?

  6. The compound methyl butanoate smells like apples. Its percent composition is 58.8% C, 9.8% H and 31.4 % oxygen. Methyl butanoate’s molar mass is 102 g/mol, what is the molecular formula?

  7. Determine the molecular formula for the following compound 40.0% C, 6.6% H and 53.4% O molar mass =120g/mol

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