@X@user.full_name@X@ @GMU: How many grams of NO must one react with a stoichiometric amount of O2 to produce -10.78 kJ?2NO(g) + O2(g) → 2NO2(g) ΔH = -114 kJ

@X@user.full_name@X@ @GMU: What is 3.47 K on the Fahrenheit scale?

@X@user.full_name@X@ @GMU: A 51.18 mL sample of 0.08538 M HCl was neutralized by exactly 34.61 mL of LiOH. What was the molarity of LiOH?HCl(aq) + LiOH(aq) → LiCl(aq) + H2O(l)

@X@user.full_name@X@ @GMU: Suppose an element consists of two isotopes having masses of 78.80 amu and 80.11 amu. The abundance of the first isotope is 24.87%. What is the average molecular mass?

@X@user.full_name@X@ @GMU: What is the structure of the hydrogen sulfate ion?

@X@user.full_name@X@ @GMU: A 54.96 mL sample of 0.2069 M HCN was neutralized by exactly 33.15 mL of Mg(OH)2. What was the molarity of Mg(OH)2?2HCN(aq) + Mg(OH)2(aq) → Mg(CN)2(aq) + 2H2O(l)

@X@user.full_name@X@ @GMU: What hybridization would you expect for the central atom of XeF2?

@X@user.full_name@X@ @GMU: What is the mass (grams) of one atom of galium?

@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: A gas mixture contains an unknown amount of H2O and 0.1286 mol of CO. How many moles of H2O are there, if the total pressure is 736.80 mm Hg and the partial pressure of H2O is 327.34 mm Hg?