reaction

See the attached.

Equation and balance

See the attached

Calculate boiling point and freezing point

Calculate boiling point and freezing point - assume complete dissociation of ionic compounds: a) 0.15 M NaCl b) 0.15 M FeCl3

Enthalpy and Bond energy

Using H-H 432.0, Cl-Cl = 239.7, H-Cl = 428.0, determine the rH for the reaction: H—H (g) + Cl—Cl(g) 2H—Cl (g) 2. If the rH of combustion of CH4 is –802kJ/mol. How many grams of water, which has a specific heat of 4.184 J/g-oC, can be heated from 20oC to 90oC by combustion of 2.00 mol o ...continues

Hydronium concentrations

Find the concentrations of H3O, HSO4 and SO4 in a 0.025 M solution of H2SO4.

Ionization Energy

The question is in the attached file 'Question.doc'.

Air bags

Air bags are activated when a severe impact causes a steel ball to compress a spring & electrically ignite a detonator cap. This causes sodium azide(NaN3) to decompose explosively: 2NaN3(s) = 2Na(s) + 3N2(g) What mass of NaN3(s) must be reacted to inflate an airbag to 70.0 L. at STP?

Equilibrium and PH

A phosphate buffer consisting of H2PO4(-1) and HPO4(-2) helps control the PH of physiological fluids. Many carbonated soft drinks also use this buffer system. What is the PH of a soft drink in which the major buffer is 0.153 M NaH2PO4 and .158 M Na2HPO4?

molar solubility

calculate molar solubility of Fe(OH)2 in 0.10 Molar NaOH.

precipitation

Solid Na2SO4 is added to a solution that contains 0.150 M Ba 2+ and 0.0800 M Ca2+. Which sulfate precipitates first, BaSO4 or CaSO4? What calculations would porve this? What shpuld be the concentration of sulfate ion for the best separation?