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Acids , by definition, are proton donors, so will donate a H + ion to a base. Examples of acids may be HCl or ethanoic/acetic acid (a.k.a. vinegar). Bases , by contrast, are proton acceptors, so will accept ...

Using the knowledge of a 2 = b 2 + c 2 - 2bcCos(A) Rearrange to aquire Cos(A) = (b 2 + c 2 - a 2 )/2bc Then input the values to obtain the angles of 42, 69, 69.

d/dx(4x 3 + 2x) = d/dx (4x 3 ) + d/dx(2x) = 4(3x 2 ) + x = 12x 2 + x

Any chemical that dissociates to give an H + ion is classified as an acid. There are stong and weak acids but at GCSE you only need to know some key reactions which apply to both weak and strong acids. acid ...

All three are types of aural imagery which is probably the most prominent type of imagery as it is easily identified by reading out the text. It is spread into many sections. 1) Alliteration: the repetition ...