What is the uncontrolled variable of this expirement: Does the shape of an ice cube affect how quickly it melts?

What is the equilibrium constant of aa+bb=cc+dd

The grooves or folds of the brain are called

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?