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So, the empirical formula means the smallest value, like the lowest common denominator in maths, but instead of fractions we are going to be using chemical formulae. I always find it easiest to set it out...
using our second equation, we can see that x=y+2. Therefore we can sub x into the first equation. This will give us 2*(y+2)+5y=25. We can go ahead and expand the brackets, which gives us 2y+4+5y=25. We ca...
To go in Spanish is ir. It is very irregular verb so the normal rules for conjugating do not apply to it. It is easier to consider that the root for the preterit tense is fuir, although ...
To find a part of the area we need the whole area first.Find the formula for the area of a circle: A= pi x r2We have been given the diameter so we need to work out what the radius ...
the nth term formula is the sum of the first term (a) and the second to last term (n-1) * the common difference (d). so a + (n-1)d where a = 2 and d = 4 in this case is 2 + (n-1)4 = 4n - 2. the sum to...
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