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How does cholera cause diarrhoea and dehydration?

Cholera is single-celled organism that produces a toxin. The toxin attaches to the ion receptors in the small intestine which causes it to secrete chloride ions into the lumen. This then causes water t...

Answered by Madhangi P. • Biology tutor

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Calculate the value of 2^(–3) as a fraction in its simplest form.

To calculate the value of 2^-3first we know that a negative exponent is equivalent to the inverse of the same number with a positive exponent.

Therefore 2^-3= 1/2

Answered by Joseff S. • Maths tutor

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Calculate the largest share when £400 is shared in the ratio 1 : 2 : 5.

To calculate the largest share, first we need to find out how much each part that makes up a share is worth.

To find out how much the smallest part is (i.e 1 part), we divide the value £4...

Answered by Joseff S. • Maths tutor

25787 Views

Explain why average bond enthalpies can be used for cyclohexane but not for benzene

Benzene has a resonance structure while cyclohexane consists of only single bonds of the same length. Benzene's resonance structure means it has intermediate bond lengths and strengths. This means aver...

Answered by Chloe M. • Chemistry tutor

4220 Views