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Succession is the term given to describe the changes that take place within an ecosystem. Barren land such as bare rock can be formed by the eruption of a volcano or a glacier retreating. The first stage ...

This formation of a major product and minor product only occurs if the double bond is unsymmetrical (when the carbon atoms involved in the double bond are bonded to different groups), for example in buten...

A) 15a - 2
B) 8a - 2
C)9a
D)15a - 6
D is correct - multiply each term in the bracket by what is outside the bracket.
The other 3 answers show different mistakes, identifying the d...

Bring the x terms onto one side of the equation, and the numbers onto the other, rearranging to get 4x=8divide both sides by 4 to get x=2check answer by subbing x=2 into the equation, such that -11=-11

Simultaneous equations are two equations with two unknowns. And they can be solved by either elimination or substitution method.For this example, we will use the elimination method. First of all to make i...