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A relevant equation is:

mass = moles x relative formula mass 

Also written:

m = n*M_r

This reaction is a 1:1 ratio of salicylic acid to...

When approaching a question like this I always find it easier to write out the equation with the known quantities written underneath each individual compound. ...

When solving simultaneous equations you are aiming to use both equations together to find out the value of x and y for values that with ‘fit’ in each equation....

The aorist tense in Greek represents a single and complete action in the past. The perfect tense represents a past action which still affects the present - the aorist has no affect on the present. 

Generally speaking, nouns that end in 'o' are masculine (el niño, el perro) and those that end in 'a' (la piscina, la manzana) are feminine. There are other clues in the endings as well. (there are some e...