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Enthalpy of Formation

Q. Determine the enthalpy change of Reaction 3: H2SO4 (l) → H2O(l) + SO3(g) using enthalpies of formation. Apply Hess's Law to determine enthalpy change for 2NaOH + SO3 → Na2SO4 + H2O(l).

Solved • Apr 18, 2019

Chemical Bonds

Q. What type of bonding would form between the following elements: Na and F : none, ionic, nonpolar covalent, polar covalent. More information is needed to determine the type of bonding.

Solved • Apr 18, 2019

Calorimetry

Q. Determine the enthalpy change (kJ/mol) given the following experimental data: When 1.50 g of sodium is placed in a calorimeter containing 40 g of water, the temperature increased from 22°C to 91°C.

Solved • Apr 18, 2019

Net Ionic Equations

Q. Complete and balance: Fe(OH)3(s) + H2SO4(aq) → . How many grams of iron(III) hydroxide are required to neutralize 20.0 mL of 6.0 M sulfuric acid?

Solved • Apr 18, 2019

Collecting Gas Over Water

Q. A 3.25 gram sample of calcium carbide, CaC2, reacts with water to produce acetylene gas ethyne and aqueous calcium hydroxide. If the acetylene is collected over water at 17C and 0.974 atm how many mL

Solved • Apr 18, 2019

Mole Concept

Q. How many grams of oxygen are in 4.50 mol of Al(NO3)3?

Solved • Apr 18, 2019

Conjugate Acids and Bases

Q. How many conjugate acid-base pairs participate in a Bronzed-Lowry acid-base reaction? a) none b) one c) two d) four

Solved • Apr 18, 2019