Step 1 :

we have mol fraction, next step is to calculate individual moles by multiplying individual mol % by total no. of moles in stream.

**Moles of A = mol fraction of A * Total Moles of stream**

calculate moles for each component in the stream.

Step -2 :

now we have moles of each component in the stream next step is to calculate weight of each component by multiplying individual moles by molecular weight

weight of A = moles of A * molecular weight of A

calculate weight for each component in the stream.

Step 3 :

now we have weight of each component in the stream, next step to calculate weight % of each component by follwoing

**Wt% of A : weight of A / total Weight of stream.**

Step – 4

by using following formula we can calculate ppm from wt%

**ppm = wt% * 10^4**

if we have wt% fraction then,

**ppm = wt fraction * 10^6**