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Empirical and molecular formulas

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  • A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
    Mg3N2
  • C2H6O Which is the correct empirical formula
    C2H6O
  • Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?
    C3H8O3
  • What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.
    K8S4O16
  • A formula with the lowest whole # ratio of elements in a compound is called
    Empirical formula
  • A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________
    Molecular formula
  • How many "C" are in CO2?
    1
  • Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.
    Na3PO4
  • You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.
    SO3
  • Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.
    Na3PO4
  • What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
    C6H12O6
  • Si2F6 what is the correct empirical formula...
    SiF3
  • What is the best definition for coefficient?
    The big number that tells you the number of molecules.
  • C2F6 what is the correct empirical formula...
    CF3
  • What is the best definition for subscript?
    The little number that tells the number of atoms for each element.
  • How many Carbons "C" are in C18H34O3
    18
  • What is the empirical formula for N2S3?
    N2S3
  • What is the empirical formula for C4H6?
    C2H3
  • Whats the empirical formula of a molecule containing 18.7% of Lithium, 16.3% of Carbon and 65.0% of oxygen?
    Li2CO3