Jan 01, 2009· Best Answer: You are given the percent composition of each element. So for 100g of the compound, you will have 36.5g Na, 25.4 S and 38.1g O. To find the empirical formula, find the moles of each by dividing the grams by the molar mass of each element. Then you divide by the lowest mole of the three. If the .
Sep 07, 2010· 1) The active ingredient in photographic fixer solution contains sodium, sulfur, and oxygen. Analysis of a sample shows that the sample contains 0.97 g of Na, 1.365 g of S, and 1.021 g of O. What is the empirical formula of the substance? 2) …
Sodium sulfide's formula, Na2S, means one formula unit contains 2 sodium atoms and 1 sulfur atom.
For sodium oxide, the empirical formula is the same as the formula unit, Na2O. (If any formula unit or molecular formula contains an atomic symbol with no following subscript, the empirical and .
Feb 22, 2012· Best Answer: If S+ F = 100 % F should be 70.3 % by mass. First empirical formula is: S0.928F3.700 This looks rather strange and it is common to convert to integer indices. The easiest attempt is to divide the the numbers. 3.7/ 0.928 = 3.98 which is very close to 4.
Empirical Formula: Definition and Examples - ThoughtCo
4. A sample of an unknown compound containing sodium, sulfur and oxygen has a mass of 1.006 g. Analysis shows this sample to contain 0.2928 g of sodium and 0.4074 g of sulfur. Assuming the remaining mass is oxygen determine the empirical formula of this compound. 0.2928 g Na 1 mol Na 23.0 g Na = 0.01273 mol Na 0.4074 g S 1 mol S
Sodium sulfide is the chemical compound with the formula Na2S, or more commonly its hydrate Na2S·9H2O. Both are colorless water-soluble salts that give strongly alkaline solutions. When exposed to moist air, Na2S and its hydrates emit hydrogen sulfide, which smells like rotten eggs. Some commercial samples are specified as Na2S·xH2O, where a weight percentage of Na2S is specified. Commonly …
Jun 11, 2014· The formula for sodium sulfide is #Na_2S#. Since this is an ionic compound, you must balance the charges so that overall charge of the compound is neutral. Sodium, an alkali metal, has a tendency to lose one electron. As a result sodium normally carries a positive one charge. Sulfur, a nonmetal, has a tendency to gain 2 electrons.