A scientist states that energy is neither created nor destroyed. Using your understanding of the three ways heat is transferred, describe how this model supports this statement.

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?

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-

How many neutrons does an element have if its atomic number is 50 and its mass number is 166