1.- Determine the empirical formulas of the compounds with thefollowing composit

Question

1.- Determine the empirical formulas of the compounds with thefollowing compositions: a) 40.1 % C, 6.6 % H, 53.3 % O;  b) 18.4 % C, 21.5 % N, 60.1 % K; c) 2.1 % H, 65.3 % O, 32.6 %S, d) 20.2 % Al, 79.8 % Cl.
2.- The empirical formula of a compound is CH. If the molar mass ofthis compound is about 78 g, what is its molecularformula? 3.-Tin(II) fluoride (SnF2) is often added totoothpaste as an ingredient ro prevent tooth decay. What is themass of F in grams in 24.6 g of the compound? 1.- Determine the empirical formulas of the compounds with thefollowing compositions: a) 40.1 % C, 6.6 % H, 53.3 % O;  b) 18.4 % C, 21.5 % N, 60.1 % K; c) 2.1 % H, 65.3 % O, 32.6 %S, d) 20.2 % Al, 79.8 % Cl.
2.- The empirical formula of a compound is CH. If the molar mass ofthis compound is about 78 g, what is its molecularformula? 3.-Tin(II) fluoride (SnF2) is often added totoothpaste as an ingredient ro prevent tooth decay. What is themass of F in grams in 24.6 g of the compound?

Explanation / Answer

We know that :

    C - 40.1 %   = 40 / 12 = 3.33

     H - 6.6 %    = 6.66 / 1  = 6.66

     O - 53.3 % = 53.3 /16 = 3.33

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