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15mg per kilo recommended dose 15x60 = 900mg recommended dose for a 60kg adult There is 755mg per 100g portion of tuna So 900/755 = 1.19 times the amount in 100g of tuna is the recommended dose 1.19 x 100...

Basicallly a mole refers to a number, in the same way as a dozen also refers to a number, this number being 12. Except instead of 12, the word mole refers to the number of 6 x 10²³, which is...

A mole is a unit for amount of substance.

This unit was created because we needed a common unit which could be used to convert from eg. number of atoms/molecules to grams or concentration...

This question is basically just asking you why water has a higher boiling point that H₂S. So you need to ask yourself what is the factor which means water has a higher boiling point? If you ...

Concentration of NaOH=Concentration of OH- ions (NaOH is a strong base)

Kw=1x10^-14 (at room temperature/25 degrees)

using Kw=[H+][OH-]

We can figure out the [...