from mole fractions to mass fractions

[tullio viola]

Hello everyone,

I'm using this code to save simulation data into csv file ( pressure, time, temperature and molar fraction of chemical species) How can I save directly in mass fractions?

while(tnow < tfinal):
    tnow = reactorNetwork.step()

    i +=1
    # Storing results after every step can be excessive. Instead, store results
    # every 10 steps, or more frequently if large steps are being taken.
    if tnow-tprev > 1e-2 or i == 10:
        i = 0
        tprev = tnow
        tHyBatchBOX_base.loc[tnow] = reactorNetwork.get_state()
        tHy_buffer.append(r.thermo.state, t=tnow)

Best regards

Tulllio