Top answers

Why does iodine have a higher boiling point than chlorine?

Neither iodine or chlorine have permanent dipoles because there is no difference in electronegativity between the atoms, so there are no permanent dipole : permanent dipole interactions. There are also no hy...
EE
Answered by Ellie E. • Chemistry tutor
11039 Views

A curve has the equation y=3x^2-2x+7, find the gradient of the line at the point (6,3)

dy/dx = 34
BC
Answered by Ben C. • Maths tutor
5642 Views

What should I do if I get an exam question which I don't have any quotes for?

Firstly, it is important to try to reduce the risk of this happening beforehand by learning as many quotations as possible. A good way to look at it is that no quote you learn will be unhelpful, and every qu...
FM
5791 Views

What is the difference between internal and external validity?

Internal and external validity both relate to the evaluation of a research's study / procedure' validity. Internal validity refers to whether there is a causal relationship between the independent variable (...
KK
5185 Views

How do I prove (x-2) is a factor of the function f(x) = x^2-4x+4?

First equate the factor to equal 0 then solve:x -2= 0;x = 2; now plug the number 2 into all the X values: (2)^2-4(2) + 4 = 8-8 = 0
LC
Answered by Luke C. • Maths tutor
3912 Views