Given the following equation: 8 Fe + S8 → 8 FeS What mass of iron is needed to react with 15.0 grams of sulfur?

Select the correct answer. what is the nature of the se-cl bond in a molecule of selenium chloride (secl2) if the electronegativity value of selenium is 2.55 and that of chlorine is 3.16?

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Avogradoa number was calculated by determining the number of atoms in?