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Crude oil is a mixture of hydrocarbons with varying length carbon chains. The main method used to separate these is fractional distillation. The crude oil is heated, then placed inside a fractionating col...

Start with the number 252 and split into factors, for example it is even therefore is divisible by 2. Work out the other number and then continue finding factors of each number until you are left with pri...

Ionisation energy is the energy required to remove one electron from an isolated gaseous atom (in its ground state). This generates a cation (ion with a positive charge).
Both Mg and Al are in period...

8x + 4y = 4,4y = 18 - 8x,2y = 2 - 4x,18y = 18 - 36x,6x - 18y = 16,18y = 6x - 16,6x - 16 = 18 - 36x,42x = 34,x = 34/42 = 17/21,18y = 90 - 36(17/21),18y = 426/7,y = 71/21

You can use the verb 'ser' when talking about something temporary eg. emotion: soy feliz - I am happy, physical characteristic: soy baja - I am small. Ser is also used with time eg. son las once - it's 11...