Problem: A compound is composed of 63.81 % C, 6.42 % H, and 29.77 % N by mass. You may round element molar mass to 2 decimal places. a) The Empirical formula of this compound is ___.       b) If the molar mass of the compound in a) is 188.2 g/mol, the molecular formula of this compound is ___.

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A compound is composed of 63.81 % C, 6.42 % H, and 29.77 % N by mass. You may round element molar mass to 2 decimal places.

a) The Empirical formula of this compound is ___.

b) If the molar mass of the compound in a) is 188.2 g/mol, the molecular formula of this compound is ___.