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What is the difference between a heterogeneous catalyst and a homogeneous catalyst?

Homo geneous catalyst - catalyst is in the same phase as the reactants. Hetero geneous catalyst - catalyst is in a different phase as the reactants. What this means is that the reactants will be either a gas...
KW
Answered by Katie W. • Chemistry tutor
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Differentiate (x^2)cos(3x) with respect to x

First we start off by seeing that we are multiplying together two functions both containing x, so we want to apply the product rule. As we know the product rule is (f(x)g(x))'=f(x)g'(x)+f'(x)g(x) so we can a...
AB
Answered by Arthur B. • Maths tutor
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Write (3 + 2√5)/(7 + 3√5) in the form a + b√5

First multiply top and bottom by conjugate of denominator, (7-3√5), and expand(3 + 2√5)(7 - 3√5)/(7 + 3√5)(7 - 3√5)(21 + 14√5 - 9√5 - 30)/(49 + 3√5 - 3√5 - 45)Simplify top and botton(-9 + 5√5)/4Write in requ...
BA
Answered by Beth A. • Maths tutor
6193 Views

In the Photoelectric Effect, what is mean by 'threshold frequency' and how does the magnitude a photons frequency effect the electron it is absorbed by?

The threshold frequency is the minimum frequency a photon can be and still just overcome the work function (Φ) of a particular material. The threshold frequency is directly proportional to the work function ...
JH
Answered by Josh H. • Physics tutor
15781 Views

Can you aid me in my D&T A-Level Coursework?

Of course, allow me to read through it or walk me through it and I will aid you in it and advise on appropriate methods where possible
BB
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