What are the empirical and molecular formulas of the fuel?
Assume that 100 g of compound are present. The percentages can be used as gram masses. empirical formula: NH2 molecular formula: N2H4 (the compound is called hydrazine) • The following reaction was performed: Fe2O3 (s) + 2X (s) ” width=”15″ height=”10″ border=”0″ align=”ABSMIDDLE”> 2Fe (s) + X2O3 (s) It was found that 79.847 g of Fe2O3 reacted with “X” to form 55.847 g of Fe and 50.982 g X2O3. Identify element X. • A combustion device was used to determine the empirical formula of a compound containing only carbon, hydrogen, and oxygen. A .6349 g sample of the unknown produced 1.603 g of CO2 and .2810 g of H2O. Determine the empirical formula of the compound. C7H6O2 • Chemical Equations • Balancing: Must have same number of atoms of each type on both sides. Achieve this by adjusting coefficients in front of formulas. • Mass/Mass problems Law of Conservation of Mass eg. How many grams of silver sulfide can be generated from the reaction of 3.94 g of silver nitrate with excess sodium sul
