A 51.7 gram sample of iron is heated in the presence of excess sulfur. A metal sulfide is formed with a mass of 95.99 g. Determine the empirical formula of the metal sulfide. Empirical formula =

What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, c2h6? in this reaction, ethane is burned in the presence of oxygen (o2) to form carbon dioxide (co2) and water (h2o). (g)+(g)→(g)+(g)

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)