Calculate the lattice energy of calcium chloride given that the heat of sublimation of Ca is 121 kJ/mol and ¢H°f (CaCl2) 5 2795 kJ/mol.

How many moles of helium are in 16 g of the element

Consider this reaction: Fe2O3 + S → Fe + SO2 Reduction half-reaction: 2Fe+3 + 6e - → 2Fe Oxidation half-reaction: S → S+4 + 4e - After balancing the chemical equation, what are the coefficients for these compounds? Fe & SO2

What is the change of e-

Which one is more metallic? 1. A) Potassium or B) Bromine 2. A) Cesium B) Sodium 3. A) Silicon or B) Aluminum 4 A) Gold or B) Bismuth

Classify each of the following as a path function or a state function. work energy distance traveled enthalpy heat

Ammonia (NH3) is one of the most common chemicals produced in the united states. it is used to make fertilizer and other products. Ammonia is produced by the following chemical reaction. N2 (g) + 3h2 (g) = 2nh3 (g) If you have 1.00 x 10^3g of N2 a.

How many grams of O2 are in 5.0 moles of the oxygen gas?

How many of the following compounds are soluble in water? Cu (OH) 2

Mg is a member of which family? a) noble gases b) halogensc) alkaline earth metals d) alkali metalse) none of the above

How does an atom differ from a molecule?