[GG]

Hi,

I was solving a problem, but I don't understand what means m/m%.

mineral contains 36.41 m/m% --O;
 
empirical formula is 1:1:1

and difference in atomic number is 4 (between metals)

thank you in advance.

[Borek]

Most likely m/m means mass/mass, so it is equivalent to w/w - weight/weight.

If you have 100g of mixture containing 1g of a component, component concentration is 1% w/w.

[GG]

I tried but answer makes no sense.

[Borek]

Can't say I am able to find a reasonable solution.

Are you sure you have copied the problem correctly?

It is easy to calculate sum of atomic masses of both metals - but no pair of metals fits this number.

No other idea what m/m can refer to (that is, it could be moles/moles - so it would be a molar fraction, but then in a 1:1:1 compound molar fraction of O is just ¹/₃).

[GG]

Still thank you for your help , Ill ask my teacher. Maybe she will know how to solve it.