Do free electrons exist under normal conditions

What two terms are used to describe the enthalpy changes for the reactions?

cliff hanger smokes 1 pack of cigarettes per day. How many cigarettes will be smoke in 7 years of smoking at that rate? (1 pack = 20 cigarettes)

A farmer uses water to irrigate his potato crops. Which roles of water does this examplify

Which one has more weight : air containing moisture or hot air

Which of the following compounds is likely to be a base? H2SO4 HCl Ca (OH) 2 HF

Which reaction is endothermic? H2 (g) + ½ O2 (g) → H2O (g), ΔH = - 57.82 kcal ½N2 (g) + O2 (g) + 8.1 kcal → NO2 (g) ½N2 (g) + 3/2H2 (g) → NH3 (g) + 11.0 kcal C (diamond) + O2 (g) → CO2, ΔH = - 94.50 kcal

If a temperature increase from 10.0 ∘C to 21.0 ∘C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction

Chlorine released from chlorofluorocarbons (cfcs) reacts with ozone in the atmosphere to form oxygen. the proposed reactions are cl (g) + o3 (g) →clo (g) + o2 (g) clo (g) + o (g) →cl (g) + o2 (g) identify the species that acts as a catalyst and the

What does one of the elements in the periodic table have?

Children's reactions to divorce often include which of the following groups of behaviors?