Look at the following chemical equation 4FeS + 702 - 2Fe2O3 + 4502

What is true about this chemical equation?

A. It is unbalanced because the sum of the coefficients of the reactants is greater than the sum of the coefficients of the products.

B. It is balanced because the mass of the reactants is equal to the
mass of the products.
C. It is balanced because the sum of the coefficients of the reactants is greater than the sum of the coefficients of the products.
D. It is unbalanced because the mass of the reactants is greater than
the mass of the products.

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp