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Describe the structure of benzene, and how this affects its stability.

Benzene has the molecular formula C 6 H 6 , with the 6 carbon atoms forming a planar hexagonal ring of C-C sigma bonds. The six hydrogen atoms, one attached to each carbon atom via a C-H sigma bond, protrude...
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Answered by George T. • Chemistry tutor
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Find the derivative of sinx, use that to find the derivative of xsinx

the derivative of sinx is cosx, then we know that we can apply the product rule to find derivative of xsinx, such that if we let u=x and v=sinx and apply the formula d/dx(xsinx)=u dv/dx+v du/dx. to obtain xc...
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Answered by Niren B. • Maths tutor
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Explain the law of supply and demand and why it is important.

The law of supply and demand is one of the fundamental concepts of basic economics. It is the foundation on which several economic theories have been built. The law of demand states the higher the price of a...
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Answered by Adriana G. • Economics tutor
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How do you explain the change in membrane permeability as temperature increases?

Generally, increasing the temperature increases membrane permeability. At temperatures below 0 o C the phospholipids in the membrane don't have much energy and so they can't move much, which means that they'...
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Answered by Ella F. • Biology tutor
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Solve the simultaneous equations. 3x + 5y = 1 , 2x - 3y = 7

3x + 5y = 1 (eq 1) 2x - 3y = 7 (eq 2) Step 1 - 2* (eq 1) 6x + 10y = 2 (eq 3) Step 2 - 3* (eq 2) 6x - 9y = 21 (eq 4) Step 3 - eq 4 - eq 3 to cancel the x -19y = 19 Therefore, y = -1 (eq 5) Step 4 - sub (eq 5)...
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Answered by Ann L. • Maths tutor
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