Top answers

There are three test tubes. One containing HCl, one containing HBr and containing HI. How could you identify which is in each test tube?

Add acidified AgNO 3 to each test tube. HCl will produce a white precipitate, HBr will produce a cream precipitate and HI will produce a yellow precipitate.
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Answered by Adam L. • Chemistry tutor
9730 Views

Consider the arithmetic sequence 2, 5, 8, 11, ... a) Find U101 b) Find the value of n so that Un = 152

Firstly, as with any question, make sure to check your formula book in order to find any relevant equations. In this case, the one most relevant to us is U n = U 1 + d(n-1). From here we will need to find th...
KW
Answered by Kirsty W. • Maths tutor
12763 Views

Explain the effect succession has on biodiversity

Succession initiates in regions where there are very harsh conditions and so no organisms are able to survive (therefore little biodiveristy); -a pioneer species with good adaptaions are able to survive and ...
DM
Answered by Denya M. • Biology tutor
9761 Views

How can a government manipulate floating exchange rate?

A government can manipulate floating rate by controlling the interest rate. To increase the exchange rate, ie the value of the currency, the government can increase its interest rate, which attracts foreign ...
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Answered by Matthew L. • Economics tutor
3438 Views

A curve has equation y^3+2xy+x^2-5=0. Find dy/dx.

To find the derivative of this, we must differentiate each term with respect to x. This implies d/dx(y^3+2xy+x^2-5=0). We can differentiate each term seperately so d/dx(y^3+2xy+x^2-5=0) is equal to d/dx(y^3)...
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Answered by Matthew C. • Maths tutor
5643 Views