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first substitute all the values you know into the formula (use brackets to make your work clear) 4(4) + 2(3) we know that 2 numbers next to eachother means multiply so expand it 4 x (4) + 2 x (3) using BODMA...

the forward reaction of the harbour process is exothermic, it gives out heat. so increasing temperature will shift the equilibrium and decrease the yeild, however increasing the temperature also increases th...

Empirical formula is the simplest ratio of elements in a formula. chemists use it to make big molecules easier to work with when doing calculations. An example of a working out an empirical formula is; Q) He...

As is often the case in tackling English questions, there is no right or wrong answer, the key is in choosing a few strong ideas which you can support with evidence from the text and which you can communicat...

Wave cut platforms are created as a cliff retreats, due to weathering at the top of the cliff and sea erosion at the base of the cliff. Coastal erosion creates a wave-cut notch at the base of the cliff, as t...