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1. Parabens are esters of 4-hydroxybenzoic acid (*structure*), give example of a paraben & draw other compound used to make it. 2. Suggest a possible use for parabens. 3. What type of hybridisation does the aromatic carbon adopt? 4. How do pi bonds form?

Eg. methyl/ethyl/propyl (etc.) paraben. Drawing of the alcohol used to make paraben. Possible uses: food preservative, cosmetic, or pharmaceutical use. The aromatic carbon atoms are sp 2 hybridised. p orbita...
Answered by • Chemistry tutor
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Give the IUPAC name of CH3CH2CH2CH2CH(OH)CN and describe why the formation of this molecule creates 2 enantiomers.

The IUPAC name of CH 3 CH 2 CH 2 CH 2 CH(OH)CN is 2-Hydroxyhexanenitrile as its carbon chain is 6 carbons long (Hex). The nitrile group takes naming priority over the alcohol group so goes at the end of the ...
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Answered by Owen R. • Chemistry tutor
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Maths A Level: "Sketch the curve of the function f(x) = 2x^3 - 2x - 12 and show that the equation f(x)=0 has one root; calculate the root."

Consider the curve y = 2x^3 - 2x - 12.1) y-intercept. When x=0, y= -12 3) when x tends to infinity...y tends to infinity and when x tends to negative infinity...y tends to negative infinity 4) stationary poi...
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Answered by Joseph I. • Maths tutor
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How does Insulin work within the body?

Insulin is a hormone that is produced by the pancreas and is released into the bloodstream to control the level of glucose in the blood. When the blood glucose concentration is too high, the pancreas secrete...
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Answered by Sonam P. • Biology tutor
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What is a world city?

A city that has very significant economic or financial and/or political influence on an international scale. Key features:Major centre for finance, business, trade. Major centre for culture, media. Major cen...
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Answered by Rose J. • Geography tutor
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