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The first step is to differentiate both sides of this equation with respect to x - we will then be able to solve for dy/dx. Differentiating the right side of the equation gives d/dx(17)=0. We’ll different...

M_r of MgCl₂ = 24.3 + 2(35.5) = 95.3 Moles added = 2.11/95.3 = 0.02214 Mol of cl^-  added = 20.02214 = 0.04428 Conc = 0.04428/(3010^-3) = 1.48 moldm^-...

A question like this is likely to be worth 2-4 marks. In order to answer the question fully, you will need to state the advantage or disadvantage and then explain your reasoning.

An advantage of la...

We want to rearrange the expression to the form (1+y)^n so we can use the general result: (1+y)^n=1+ny+[n(n-1)/2]y^2+[n(n-1)(n-2)/3!]y^3+... 1/(2+5x)^3 = (2+5x)^-3 = [2(1+5x/2)]^-3 = (2^-3)(1+5x/2)^-3 usi...

To form the subjunctive, we must look at the third person plural conjugation of the verb (the 'they' form). You remove the -ent ending and replace it with new subjuntive endings (-e, -es, -e, -ions, -iez,...