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@X@user.full_name@X@ @GMU: What is the molarity of KOH if it took 22.36 mL of KOH to neutralize 0.2169 g of oxalic acid (FM = 126.07 g /mol)?H2C2O4*2H2O(aq) + 2KOH(aq) → K2C2O4(aq) + 4H2O(l)

@X@user.full_name@X@ @GMU: A compound contains only rubidium and astatine. A sample weighing 9.34 g of this compound contained 2.70 g of rubidium. How many grams of astatine would there be in another sample of this compound containing 7.48 g of rubidium?

@X@user.full_name@X@ @GMU: What is the molarity of NaClO4 if 7.531 g was dissolved in exactly 100 mL?

@X@user.full_name@X@ @GMU: How many grams of KCN must be dissolved to produce exactly 100 mL of a 1.362 M solution?

@X@user.full_name@X@ @GMU: Construct a molecular orbital energy diagram of N2-. What is its bond order?

@X@user.full_name@X@ @GMU: The density of a particular gas is 1.4376 g/L at 727.01 mm Hg and 22.50 °C. What is the molecular mass of the gas?

@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?