C2H4 + H2 <======> C2H6 What is this type of reaction?
What is a mole?
A mole is the amount of pure substance containing the same number of chemical units as there are atoms in exactly 12 grams of carbon-12 (i.e., 6.023 X 10^23).
Simplify | - x2 + 4x - 4 |.
| - x2 + 4x - 4 | : given = | -(x2 + 4x - 4) | = | -(x - 2)2 | = (x - 2)2 *Absolute bracket takes away the negative sign.*