2016年7月9日 · The molecule formula is Fe_2S_3 The molecule iron (III) sulfide is an ionic molecule between the metal Iron and the non-metal sulfur. In an ionic molecule the formula is determined by balancing the charges on the ions. For this case the roman numeral (III) tells us the iron has a charge of +3 or Fe^(+3) The the element sulfur has a charge of -2 or S^(-2) To …

2016年7月15日 · Iron(II) sulfide. The first thing to recognize here is that you're dealing with an ionic compound made up of iron, "Fe", a metal, and sulfur, "S", a nonmetal. Right from the start, you should know that the metal will form a positively charged ion, i.e. a cation, and the nonmetal will form a negatively charged ion, i.e. an anion. Now, grab a periodic table and look for sulfur. …

2014年5月14日 · How many grams of Fe are produced if 16.0 grams of sulfur? We begin with a balanced chemical equation that is provided in the question. 8Fe + S_8 -> 8FeS Next we determine what we have and what we want. We have 16.0 grams of sulfur and we want grams of iron. We set up a roadmap to solve the problem grams S -> mol S -> mol Fe -> grams Fe We …

2016年7月30日 · This site reports the melting point of FeS as 1188 ""^@C. This melting point is reasonably high for an ionic species; as we would expect given the 2+, 2- charges on each of the ions. Clearly, the sulfide is non-molecular, which accounts for the high melting point. We should, however, make the comparison with FeO, which is congeneric with the sulfide. This site …

2015年5月4日 · The elements of the compound iron sulfide, "FeS", are the transition metal iron, "Fe", and the nonmetal sulfur, "S".

2016年1月28日 · Fe_2S_3; i.e. an analogue of ferric oxide, Fe_2O_3. See this site. Sulfur typically has a -2 oxidation state (it is a Group VI atom, and its redox chemistry follows that of oxygen). And Fe^(3+), ferric ion, has a +3 oxidation state. …

2018年4月23日 · 24.0 g Fe + S + FeS n(Fe) = 15.24 / 55.8 = 0.273 mol n(S) = 17.34 / 32.0 = 0.542 mol A simple way to check which is the limiting reagent is to divide moles of substances by its mole coefficient in the reaction. In this case we need not divide as its 1 for both Fe and S. After doing so, we see which is the bigger value and in this case its sulfur. Thus sulfur is the excess …

2017年4月13日 · Here's what I got. The first thing you need to do here is to convert the mass of iron(II) sulfide to moles by using the compound's molar mass 1.76 * 10^(-8) color(red)(cancel(color(black)("g"))) * "1 mole FeS"/(87.91color(red)(cancel(color(black)("g")))) = 2.002 * 10^(-10) "moles FeS" The molar solubility of iron(II) sulfide tells you the number of …

2018年2月23日 · 2.4 * 10^(-15) "g" You know that iron(II) sulfide is considered insoluble in water, which implies that when you dissolve this salt in water, a dissociation equilibrium is established between the undissolved solid and the dissolved ions. "FeS"_ ((s)) rightleftharpoons "Fe"_ ((s))^(2+) + "S"_ ((aq))^(2-) Notice that every mole of iron(II) sulfide that dissociates produces …

2016年12月14日 · Iron pyrites is "iron persulfide", FeS_2, with a formal Fe(II+) oxidation state. ... is iron (lI) sulfide ...