BME680 VOC ppm to mg/m3

Hi Sir/Madam,

I have a project is using the BME680 to detect the VOC value. BME680 which can output the bVOC value in ppm. Is it possible can convert this value from ppm to mg/m3? Also, is it bVOC is same as TVOC? 

Looking forward anyone can reply. Thanks a lot. 

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