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Nitric acid (HNO3) is a strong acid. Ethanoic acid (CH3COOH) is a weak acid. Write an equation to show how ethanoic acid behaves as a weak acid in its reaction with water.

CH3COOH + H2O ⇌ CH3COO– + H3O+

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Why is this reaction an Endothermic reaction?

bond making is exothermic, bond breaking is endothermic. It takes more energy to break the bonds than the energy released in making new bonds

Answered by Jigi M. • Chemistry tutor

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What are the functions of glycoproteins in the cell membrane? (6 marks)

Antigens - cell recognition/cell signalling - receptor or binding site for hormones - cell adhesion - attach to water molecules to stabilise the cell membrane - receptor/ binding site/ trigger

Answered by Jigi M. • Biology tutor

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How does sweat cool the body down? (2 marks)

Water in the sweat evaporates due to the body temperature of the organism - This takes heat with it

Answered by Jigi M. • Biology tutor

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What are complex and imaginary numbers and how are they different from normal (real) numbers?

When you think of a number line, zero lies at the centre and the positive numbers stretch off to the right, while negative numbers go off left. This is a representation of real numbers, i...

Answered by Tutor59493 D. • Maths tutor

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