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Why is 2 + 2 not equal to 12?

This might seem like an obvious question and the instinctive urge is to disregard it entirely. Perhaps you would think "well that's silly, it's just not!" Well, that's the intention of the question...
XJ
Answered by Xav J. • Maths tutor
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What is meant by organic growth of a business?

Organic growth is when a business is using its profits to expand naturally, without needing to turn to external forms of investment such as a bank loan.
MB
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How does glycolysis produce ATP?

Glycolysis produces energy through the form of ATP. ATP is created directly from glycolysis through the process of substrate-level phosphorylation (SLP) and indirectly by oxidative phosporylation (OP). The t...
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Answered by Charlie H. • Biology tutor
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integrate e^x sin x dx

1/2 e x (sin x -cos x)
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Answered by Sam J. • Maths tutor
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25 cm^3 of a solution of known 0.2M HCl is neutralised by titration by 21.5cm^3 of NaOH solution. Calculate then concentration of the NaOH solution to 3dp.

Recall n = c *(v/1000) if the volume is in Cm 3 . Now, n(HCl)= 0.2 x (25.0/1000) n(HCl) = 5x10 -3 Since the relationship stoichiometrically is 1:1 (H + : OH - ), we can infer that n(NaOH) = 5x10 -3 and by re...
WF
Answered by Will F. • Chemistry tutor
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