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In terms of the structure and boiling point of graphite, explain why the melting point is high

Each carbon atom in graphite is bonded to three other carbon atoms. These carbon atoms are linked by covalent bonds - which are very strong. Graphite is arranged in sheet like structures and between each lay...
TM
Answered by Tinashe M. • Chemistry tutor
51346 Views

What happens to the rate of an enzyme-catalysed reaction when temperature increases? And when pH changes?

As temperature increases, the molecules involved in the reaction gain kinetic energy, increasing the chances of collision between the substrate molecules and the active sites of the enzymes, a step that is n...
MD
Answered by Maria D. • Biology tutor
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f(x)=2x^3-7x^2+4x+4, prove that (x-2) is a factor and factorise f(x) completely

if (X-2) is a factor, f(2)=0 2 2^3-7 2^2+4*2+4= 16-28+8+4=0 therefore (x-2) is a factor. 2x^3-7x^2+4x+4=(x-2)(2x^2-3x-2)=(x-2)(2x+1)(x-2)
BP
Answered by Bryce P. • Maths tutor
5409 Views

Find the derivation of (sinx)(e^2x)

Because there are two forms of x , the form uv'+vu' must be used. If y=sinx , dy/dx=cosx If y=e^kx , dy/dx=ke^kx Therefore dy/dx=(sinx)(2e^2x)+(e^2x)(cosx)
EB
Answered by Eric B. • Maths tutor
5494 Views

Could you explain the distribution of the incidence of a tax and why it may fall differently on consumers and producers?

Firstly it would be useful to define terms and state that the majority of the time the tax in question will be a tax on a good or service for example the tax on cigarettes (tobacco). The reason that this que...
IV
Answered by Isaac V. • Economics tutor
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