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How can I convert the number of particles per liter to gram per liter? I know the size of these particle and so, I calculated the volume and then by the density I calculate the mass. After that I don't know what to do

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  • $\begingroup$ Do you know which substance this is or only how many particles per liter are in your solution? $\endgroup$ – pH13 - Yet another Philipp Jul 14 '15 at 12:09
  • $\begingroup$ I am not sure about the substances. Because I am still investigating that. They are about 8e8 particles per ml $\endgroup$ – Medi Jul 14 '15 at 12:22
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$$x \frac{particles}{L} \times \frac {1 mol}{6.023 \times 10^{23}particles}\times \frac{MW gm}{mol}$$

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I would go with the Avogadro constant -> calculate how many moles per liter there are in your mixture and then, using the molecular mass, you can calculate the concetration in g/L. That is if you know your compound.

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  • $\begingroup$ Thanks, but I am not certain what these particles are!! So it is hard to assume molecular mass $\endgroup$ – Medi Jul 14 '15 at 12:18

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