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For the reaction 2H2 + O2 -- 2H2O, how do I give an equation for the equilibrium constant in terms of the concentrations of products and reactants involved?

For any reaction, the equilibrium constant is given in the form: K = [products] / [reactants] Where [ ] is used to denote the concentration of the species. Therefore we can substitute in for the molecules gi...
LS
Answered by Liam S. • Chemistry tutor
25325 Views

Calculate the momentum of a 5 tonne truck at 50km/h

We know momentum= mass (kg) X Velocity (m/s) So we need to do these conversions: 1tonne=1000kg so 5 tonnes is 5x1000kg = 5000kg There are 1000km in a meter so 50x1000= 50000m/h to get this into m/s we know t...
CZ
Answered by Callum Z. • Physics tutor
3141 Views

Using complex numbers, derive the trigonometric identities for cos(2θ) and sin(2θ).

When dealing with complex numbers and trigonometric functions, always turn to DeMoivre's Theorem that states [cos(θ)+isin(θ)] n = [cos(nθ)+ i sin(nθ)]. If we set n=2, the we see a combination of cos(2θ) and ...
TK
Answered by Thomas K. • Maths tutor
9405 Views

Integrate (x+3)^(1/2) .dx

[whiteboard feature does not seam to be working here] Here we need to make a U sibstitution. So we take (x+3) and make this equal U so we now have the integral of u^1/2 . dx In order to switch to .du and do ...
CZ
Answered by Callum Z. • Maths tutor
5087 Views

How do you form the pluperfect tense?

The pluperfect, much like the passé composé, is a compound tense (i.e. made up of two parts). The first is the auxiliary verb (avoir or être) and the second is the past participle. For this example, I will u...
DF
Answered by Darcy F. • French tutor
3548 Views