Which reaction is exothermic?

CH4 + 2O2 - - >CO2 + 2H2O + 891 kJ

NH4NO3 + H2O + 25 kJ - - > NH4 + (aq) + NO3 - (aq)

2H2O + 286 kJ - - > 2H2 + O2

N2 + O2 + 181 kJ-->2NO

Calculate the frequency of the red light emitted by a neon sign with a wavelength of 690nm

Chemical reactions chemical equilibrium occurs when the rates of the reactions a. equal out in both directions. b. increase from reactant to product. c. increase from product to reactant. d. decrease from reactant to produ

Eisenhower, Kennedy, and Johnson all approved of the United States backing the South Vietnamese in their civil war. a. True b. False

How many molecules of water would be needed to break apart a polysaccharide molecule made up of 20 simple sugars and what is the process called?

Which mode of drinking water has the most negative impact on the environment?

An unknown gas has a pressure of. 0240 atm. what is the pressure in torr?

Explain why a wooden spoon is a better choice than a metal spoon for stirring a boiling pot of soup

Is MgCO3 a correct chemical formula

Water is an exaple of a mixture because it is made up of hydrogen and oxygen atoms bonded together true or false

Chlorine plus lithium bromide