Top answers

Unsaturated fats change bromine water from orange to colourless. How?

Unsaturated fats usually have a C=C double bond, e.g. vegetable oil. So, it's 'unstable' because of the high concentration of negative charge (electrons). Bromine (B2) is not polarised. However, as it approa...
AC
Answered by Abi C. • Chemistry tutor
10141 Views

Differentiate sin(5x) and 3cos(x) and 3tan(5x)

sin cos -sin -cos (down is differentiate and up is integrate) so, y = sin5x dy/dx = 5cos5x y=3cox dy/dx = -3sinx y=3tan5x dy/dx = 15sec 2 (5x) (remember sec(x) is the reciprocal of cos(x))
AC
Answered by Abi C. • Maths tutor
5179 Views

Expand and simplify the following: 3(z + 6) – 2(4z + 1)

Expand the brackets: (3z + 18) - (8z + 2) Simplify: 16 - 5z
RW
Answered by Ryan W. • Maths tutor
4223 Views

Does it matter which college I apply to?

The short answer is no, not really. Each colllege is different - the number of students in each year group, whether it's old or new, whether it's central or slightly outside of town. But that said, you will ...
CV
1802 Views

What should I write in a personal statement?

Personal statements explain why you are passionate about the subject you have applied for. So they might include what you have studied as part of your curriculum, and how this led you to explore your subject...
CV
2422 Views