@X@user.full_name@X@ @GMU: What is the mole fraction of sodium sulphate, Na2SO4, in an aqueous solution that contains 1.2241 g of sodium sulphate dissolved in 25.1317 grams of water? MW(Na2SO4) = 142.043 g/mol.

@X@user.full_name@X@ @GMU: How many grams of rubidium chloride, RbCl, would be required to prepare a 0.1445 m RbCl solution by combining this compound with 0.3458 L of water (assume a density of 1.00 g/mL)? The molecular weight is 120.9205 g/mol.

@X@user.full_name@X@ @GMU: Upon addition of sugar to water the vapor pressure of

@X@user.full_name@X@ @GMU: The reaction below is a exothermic reaction. What would one have to do to increase the size of the equilibrium constant?2PCl3(g) + O2(g)→2POCl3(g)

John Schreifels @GMU: When 0.2191 g of glucose was dissolved in 100.0 mL of water, the osmotic pressure at 32.04°C was 0.3049 atm. What is the formula mass of this compound?

@X@user.full_name@X@ @GMU: What is the activation energy (in kJ/mol) for the reaction below if the rate constants are 1.080e9 M-1s-1 at -78.00°C and 2.45e9 M-1s-1 at -53.47°C?NO(g) + O3(g) → NO2(g) + O2(g)

@X@user.full_name@X@ @GMU: The osmotic pressure of a 16.150 mM solution of Na3PO4 is 1.213 atm at 22.70 °C. How many ions per formula unit of Na3PO4 must there be? The compound may not be completely ionic.

Consider the reaction.2C(s) + O2(g) ⇋2CO(g)What is the correct expression for Kc?

Methyl acetate, CH3COOCH3 hydrolyzes in the water according to first order kinetics. Determine half-life and the rate constant.CH3COOCH3(aq) + H2O(l) → CH3OH + CH3COOH(aq)

@X@user.full_name@X@ @GMU: Determine the molality of LiBr if 7.1501 g of LiBr was dissolved in 176.30 g of H2O. MW(LiBr) = 86.845 g/mol.