A 0.020 M KMnO4 solution was used to determine the percent iron in a sample containing iron(II). MnO4^- + 5 Fe^2+ + 8 H^+ → Mn^+2 + 5 Fe^3+ + 4 H2O
It took 25.0 mL of the KMnO4 to completely react with all the iron(II) in the 0.500 g sample. What was the percent iron(II) in the sample?

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

Consider the reaction of a(g) + b(g) + c(g) => d(g) for which the following data were obtained: experiment initial [a], mol/l initial [b], mol/l initial [c], mol/l initial rate, mol/l.s 1 0.0500 0.0500 0.0100 6.25 x 10^-3 2 0.100 0.0500 0.0100 2.50 x 10^-2 3 0.100 0.100 0.0100 1.00 x 10^-1 4 0.0500 0.0500 0.0200 6.25 x 10^-3 what is the rate law for the reaction?

How does the viscosity of magma change as magma cools?