@X@user.full_name@X@ @GMU: A 20.07 mL sample of H2SeO4 was neutralized by exactly 26.49 mL of 0.1908M LiOH. What was the molarity of H2SeO4?H2SeO4(aq) + 2LiOH(aq) → Li2SeO4(aq) + 2H2O(l)

@X@user.full_name@X@ @GMU: What is the atomic number of an element if the mass of one atom is 5.145e-23 g?

Chandra takes medication to treat her depression that blocks serotonin from reentering the neuron, allowing more serotonin to stay in the synapse. This is an example of what type of psychoactive drug?

@X@user.full_name@X@ @GMU: How many decimeters are there in 15.04 centimeters?

@X@user.full_name@X@ @GMU: What hybridization would you expect for the central atom of H3O+?

@X@user.full_name@X@ @GMU: What is the volume of 38.58 g of He at a pressure of 1140.31 mmHg and a temperature of 37.68°C?

@X@user.full_name@X@ @GMU: A compound contains only magnesium and fluorine. A sample weighing 6.55 g of this compound contained 2.56 g of magnesium. How many grams of fluorine would there be in another sample of this compound containing 8.46 g of magnesium?

@X@user.full_name@X@ @GMU: A compound contains only rubidium and fluorine. A sample weighing 2.32 g of this compound contained 1.90 g of rubidium. How many grams of fluorine would there be in another sample of this compound containing 5.54 g of rubidium?

@X@user.full_name@X@ @GMU: How many grams of Na must one react with a stoichiometric amount of H2O to produce -70.57 kJ?2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g) ΔH = -368.4 kJ

@X@user.full_name@X@ @GMU: The density of a particular gas is 1.2149 g/L at 772.12 mm Hg and 32.63 °C. What is the molecular mass of the gas?