Top answers


Explain why cyclohexene will react with bromine gas but benzene will not

Cyclohexene contains a double bond, which has a greater electron density than the system of pi-bonds present in a benzene molecule. This means that a dipole can be induced in the bromine molecule due to the ...
SR
12856 Views

Prove the identity (4cos(2x))/(1+cos(2x)) = 4-2sec^2(x)

Write down the formulas involving cos2x and select the one which involves only cosine, this is because cosine (or derivations of it) is the only trigonometric function in this question. Substitute the chosen...
TN
Answered by Tegan N. Maths tutor
14192 Views

How is a meander formed?

With distance downstream, the river gains more energy and a higher volume of water (as shown in Bradshaw's Model). Because the channel has increased in size, there is less friction. As the river erodes later...
HB
Answered by Hettie B. Geography tutor
15623 Views

When do you use etre to form the perfect tense of a verb?

There are a number of verbs which take etre as the auxiliary verb when forming the perfect tense. These are generally verbs showing movement or a change of state and a useful technique to remember them is MR...
HB
Answered by Hettie B. French tutor
2891 Views

How do I know the gender of a noun?

In German, we have 3 different genders: masculine, feminine and neuter. Most of the time you simply have to learn off by heart which nouns are which gender, however there are some rules which can help. For i...
HB
Answered by Hettie B. German tutor
2253 Views