Page 1 of 1

Calculation ppm

Posted: Tue Mar 23, 2021 1:58 pm
by sue
Calculate the ppm of CdCl2 if 1.44x10 ^ 20 Cl atoms were found in a small lake whose volume is 145L.
Helpaaaaaaaaaaaaaaa :cry: :cry:

Re: calculation ppm

Posted: Tue Mar 23, 2021 2:17 pm
by ChenBeier
Use Avrogadro constant to calculate the mol of Cl. This convert the mole to Cadmium chloride. With molar mass you get the mass. The concentration is given by division through the volume. 1 ppm is 1 mg/kg ~ 1 mg/l

Re: Calculation ppm

Posted: Tue Mar 23, 2021 4:58 pm
by sue
ty

Re: Calculation ppm

Posted: Wed Mar 24, 2021 1:49 am
by ChenBeier
What is meant with ty. What you dont understand. How many Atomen is one 1 mal?

Re: Calculation ppm

Posted: Fri Mar 26, 2021 12:51 pm
by sue
mmmm i mean that ty is thank you but i dont know