Reacting masses 10. The black solid iron (11) sulfide is formed when iron and sulfur react together. (Ar values: Fe = 56, S = 32)
1 Fe(s) + S(s) → FeS(s)
a How many grams of sulfur will react with 56g of iron?

How does decreasing the gas volume affect the pressure of a gas?

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The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms