How much heat is evolved or absorbed when 25.0 g of silver oxidizes to form silver oxide (A920) under standard conditions?
The enthalpy of formation (AH) of Ag2O is -31.05 kJ mol-1 and the molar mass of silver is 107.87
g. mol-1

The chemical bubbles

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

Thermohaline circulation and gyres