What happens to the particles of substances when a chemical change occurs.

What elements form ions with a charge of - 1?

Potassium nitrate has a lattice energy of - 163.8 kcal/mol and a heat of hydration of - 155.5 kcal / mol. How much potassium nitrate has to dissolve in water, at room temperature, to absorb 1.00 x 102 kJ of heat

Given the bond energies below, calculate an estimate for ΔH (kJ) for the reaction: 2CO (g) + O2 (g) - > 2CO2 (g) Bond energy (kJ/mol) : C-O, 360; C=O, 799; CO (triple bond), 1071; O2, 498

What is the net amount of energy released when 1 mole of H2O is produced

When potassium iodide dissolves in water, the beaker becomes warm. Which statement best describes this process? A) The ΔHsolvation is exothermic and the overall ΔHsolution is exothermic.

What is the Celsius equivalent of 212°f

Identify the characteristics of tornadoes and hurricanes

When magma intrudes parallel to another rock layer, the formation is called a (n) A. sill. B. dike. C. extrusion. D. unconformity.

What is the net amount of energy released when 1 mole of H2O is produced

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?