Two substances that a green plant must obtain from its environment to carry on photosynthesis

The grooves or folds of the brain are called

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

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?