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What is the concentration of the unknown

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Reference no: EM131535053

1) What is the concentration of the unknown H3PO4 solution? The neutralization reaction is H3PO4(aq)+3NaOH(aq)→3H2O(l)+Na3PO4(aq)

A 32.00 mL sample of an unknown H3PO4 solution is titrated with a 0.100 M NaOH solution. The equivalence point is reached when 26.28 mL of NaOH solution is added.

2) Iron (III) oxide reacts with carbon monoxide according to the equation:

Fe2O3 (s) + 3CO (g) -----> 2Fe (s) + 3CO2 (g)

A reaction mixture initially contains 21.00 g of Fe2O3 and 10.50 g of CO. Once the reaction has occurred as completely as possible, what is the limiting agent? What is the theoretical yield of Fe in g? (show correct significant figures). What is the mass (in g) of the excess reactant is left?

(show correct sig figs). If the reaction mixture described above results in isolation of 10.37g of Fe, what is the percent yield?

3) Which of the following contains the largest mass of oxygen atoms?

3.65 x 10^20 molecules of SO2

.0553g of SO3

3.65 x 10^20 molecules of SO3

5.06 x 10^-3 mol of SO^3

Reference no: EM131535053

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