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Calcium carbonate is burnt substance B is created. What is the formula for substance B and what is the equation when water is added?

Cao Cao + H20 --> Ca(OH)2
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Answered by Thomas N. • Chemistry tutor
3196 Views

What is the difference between osmosis and diffusion.

Firstly, it is important to read the question, it says what is the difference so we need to look at the differences between the two processes. Diffussion is the movement of particles from an area of high con...
AZ
Answered by Ashkun Z. • Biology tutor
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Solve the simultaneous equations: 6x +2y = 2 and 12x - 3y = 18

6x + 2y = 2 and 12x -3y =18 Start by multiplying the first equation by two in order to balance both equations to have equal numbers of x 12x + 4y = 4 and 12x - 3y = 18 Rearrange both equations so that the x ...
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Answered by Jack H. • Maths tutor
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Solve x2 +2x – 4 = 0, leaving your answer in simplest surd form (4 marks, non calculator question)

'Simplest surd form' is a clue that quadratic factorising will not work for this question, so we must instead use the quadratic formula. It is always a good idea to quote this as marks are often available fo...
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Answered by Fiona O. • Maths tutor
16651 Views

Solve these simultaneous equations: 2x + 5y = 37 and y = 11 - 2x

Simultaneous equation questions look very intimidating because not only are there 2 equations to solve but there is 2 variables in each! To start with, we're going to make the equations look less confusing b...
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Answered by Bethany R. • Maths tutor
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