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Aspirin C9H8O4 is made when salicylic acid C7H6O3 reacts with ethanoic anhydride C4H6O3 . The equation for this reaction is: C7H6O3 + C4H6O3 → C9H8O4 + CH3COOH Calculate the maximum mass of aspirin that could be made from 100 g of salicylic acid.

A relevant equation is: mass = moles x relative formula mass Also written: m = n*M r This reaction is a 1:1 ratio of salicylic acid to aspirin, meaning 1 mole of salicylic acid makes a maximum of 1 mole of a...
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Answered by Emma H. • Chemistry tutor
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Integrate 4x^3 + 6x^2 +4x + 3

Each term is integrated according to the formula: ax b --> (a/(b+1))x (b+1) A constant k integrates to kx Since this is indefinite integration, an additional term of +c must be added to the expression. Th...
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Answered by Emma H. • Maths tutor
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Differentiate y = 2x^3 + 6x^2 + 4x + 3 with respect to x.

Each term is differentiated according to the formula: y = ax b --> dy/dx = b*ax (b-1) Constants differentiate to zero. Therefore in this example: dy/dx = 6x 2 + 12x + 4
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Answered by Emma H. • Maths tutor
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What is Mitosis?

During mitosis , one cell divides into two daughter cells. First, the cell grows and doubles the amount of DNA (in human cells from 23 pairs of chromosomes to 46 pairs of chromosomes). During the different s...
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Answered by Simone V. • Biology tutor
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Find the gradient of a curve whose parametric equations are x=t^2/2+1 and y=t/4-1 when t=2

Remember that the gradient of a curve is expressed as dy/dx. This can be solved by using the chain rule: dy/dx = dy/dt*dt/dx. The dt in the denominator of the first term, and the numerator of the second term...
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Answered by Abigail S. • Maths tutor
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