How to calculate the number of atoms/molecules from a set number of moles.

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?

How much carbon is stored in the atmosphere as co2