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What is a mole?

A mole is a unit of amount of substance. One mole is the number of atoms of carbon in 12g of the carbon-12 isotope(when 12 is the relative atomic mass) , which is 6.02 x 10 23 . This means that 0.5 moles of ...
HG
Answered by Hunter G. • Chemistry tutor
8882 Views

Find all of the roots of the equation y = 3x^3 - 12x

Step 1: Remove the most obvious factor, in this case 3x. y = 3x (x 2 - 4) Step 2: Realize (x 2 - 4) is the product of two squares and can undergo completing the square to produce two factors. y = 3x (x-2) (x...
VD
Answered by Victoria D. • Maths tutor
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How are mitochondria adapted for their function?

Mitochondria have a double membrane structure, with an inner layer with many folds to create a high surface area. This provides more space for more metabolising proteins and therefor they are able to create ...
EJ
Answered by Emilie J. • Biology tutor
51877 Views

Josie is paid £1200 per month. She is going to receive an increase of 4% in the amount she is paid. Work out how much money Josie we be paid each month after the increase.

We need to first work out what 4% of £1200 is. 1% of £1200 = £(1200/100) = £12. 1% is £12, so 4%= 4*£12 = £48. She will receive a £48 increase.Adding that on to her original amount, £1200 + £48 = £1248.Final...
JB
Answered by Jack B. • Maths tutor
3593 Views

Describe the process of inhalation (inspiration).

Inhale. Internal intercostal muscles relax. External intercostal muscles contract. Ribcage moves up and out. Diaphragm contracts and flattens. Volume in lungs increases. Pressure in lungs decreases. Air move...
AP
Answered by Anya P. • Biology tutor
5981 Views