Top answers

Why does Sodium Chloride have a high melting point?

Sodium Chloride has a high melting point, as it has a giant ionic lattice hence has strong electrostatic forces of attraction between oppositely charged ions, which requires lots of energy to overcome the fo...
VS
46959 Views

To what extent was the Treaty of Versailles the most important result of the First World War?

To answer any question in history we need to pull out key terms from the wording of the question. In this question, 'Treaty of Versailles' and 'most important result' are the key terms, so keep them at the f...
LT
Answered by Lucy T. • History tutor
3604 Views

How do I balance equations?

Balancing equations will become natural if you do it long enough but takes a bit of practice and can be tedious! It can be a bit of trial and error at times. It is important to remember that numbers of eleme...
AM
Answered by Aysha M. • Chemistry tutor
3093 Views

Solve the simultaneous equation, 3x + y = 8 and x + 3y = 12, to find a value for x and y.

Re arrange one of the equation to get a single variant answer. So, x = 12 - 3y. Substitute this into the other equation, so 3 (12-3y) + y = 8. Expand this equation to form 36 - 9y + y = 8. Collect the y term...
GR
Answered by Grace R. • Maths tutor
7125 Views

Show that (x + 4)(x + 5)(x + 6) can be written in the form ax3 + bx2 + cx + d where a, b, c and d are positive integers.

=(x+4)(x 2 +6x+5x+30)=(x+4)(x 2 +11x+30)=x 3 +11x 2 +30x+4x 2 +44x+120=x 3 +15x 2 +74x+120
JZ
Answered by Jiawen Z. • Maths tutor
3266 Views