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@X@user.full_name@X@ @GMU: How much heat will be involved when 5.712 g of Fe2O3 reacts with a stoichiometric amount of CO?Fe2O3(s) + 3CO(g) → 2Fe(s)+ 3CO2(g) ΔH = -24.8 kJ

@X@user.full_name@X@ @GMU: Suppose an element consists of two isotopes having masses of 65.39 amu and 66.41 amu. The abundance of the first isotope is 51.75%. What is the average molecular mass?

@X@user.full_name@X@ @GMU: What is the empirical formula of a compound if its percent composition is 73.63 % C and 12.36 % H? The compound contains only C, H and O.

@X@user.full_name@X@ @GMU: How many moles of Cl2 are in a 160.14 L tank at 48.89°C and 1.282 atm?

@X@user.full_name@X@ @GMU: A gas mixture contains 0.1906 mol of NO2 and 0.2521 mol of He. What is the partial pressure of NO2, if the total pressure is 789.44 mm Hg?

@X@user.full_name@X@ @GMU: A gas mixture contains 0.1789 mol of C2H6 and 0.2497 mol of NO. What is the partial pressure of C2H6, if the total pressure is 771.39 mm Hg?

@X@user.full_name@X@ @GMU: How many grams of NaOH must be dissolved to produce exactly 100 mL of a 1.121 M solution?

@X@user.full_name@X@ @GMU: How many grams of KCl must be dissolved to produce exactly 100 mL of a 1.170 M solution?

@X@user.full_name@X@ @GMU: Which of the elements given will have a big jump in the 8th ionization energy?

@X@user.full_name@X@ @GMU: The average speed of HCl molecules (atoms) was 719.9 m/s. What was the temperature of the gas?