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How do you find the gradient of a linear line just by looking at the graph?

When finding the gradient of a line we need to first locate any two points, on the line, where we know the x-coordinates and we know the y-coordinates. Now, with these two coordinates we need to find two val...
JS
Answered by Jozef S. • Maths tutor
3500 Views

Can you state and explain the chemistry behind Markovnikov's rule?

Markovnikov's rule states that, during electrophilic addition to alkenes/alkynes, the hydrogen atom in the electrophile will be added to the carbon atom in the alkene/alkyne that is bonded to he most hydroge...
GP
Answered by George P. • Chemistry tutor
11252 Views

Chlorine is in group 7. What is the charge on its ions, and is the charge positive or negative?

Chlorine is in Group 7 of the periodic table. Therefore a chlorine atom has 7 electrons in its outer shell. this atom needs one more electron to form an ion with a full outer shell. Hence the ion formed will...
TB
Answered by Tom B. • Chemistry tutor
120521 Views

How many quotes do I need and how do I organise them?

There are many ways to memorise quotes and although it will always be a slog, it can actually be the most fun and rewarding part of revision. Before memorising you've got to organise quotes. A big play or no...
EN
30131 Views

What is the blood supply of the liver?

The liver is unique in that it has a dual blood supply, both the portal venous system and the systemic circulation. 75% of the blood that flows through the liver is from the portal venous system, venous bloo...
AG
4411 Views