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Balance the equation for the reaction of sodium hydroxide with sulphuric acid.

H 2 SO 4 + NaOH --> Na 2 SO 4 + H 2 OWrite out all the elements involved, and how many times they appear on each side.H 3:2,S 1:1,O 5:5,Na 1:2.Start by making the number of sodiums the same on both sides ...
LB
Answered by Louise B. • Chemistry tutor
16680 Views

Find the Cartesian equation of a plane containing the points A(1, 7, -2) B(4, -3, 2) and C(7, 8, 9).

It can be shown that the equation of any plane can be given by r.n=a.n, where r = xi + yj + zk, n is a direction vector normal to the plane, and a is any point vector on the plane. a can be found easily (thr...
GM
25798 Views

How do you decide which quotes to learn, and how do you revise them for the exam?

When writing an exam answer, each paragraph should make a point , give evidence, and explain/analyse the evidence in relation to the question. The evidence is crucial in showing that you understand the text,...
ST
5048 Views

Solve algebraically the system of equations: 4x+5y=-3 and 6x-2y=5

Label both equations to make it easy to refer to them in your answerEqn 1: 4x+5y=-3Eqn 2: 6x-2y=5 To solve these equations we need to be able to eliminate either the y terms or the x terms. In order to do th...
ER
Answered by Emma R. • Maths tutor
2486 Views

Work out 90% of 130

Find 90% of 130Calculate the value of 10%130 / 10 = 13You can now use this value to find the answer as 100% - 10% = 90% 130 - 13 = 117
FW
Answered by Freya W. • Maths tutor
3370 Views