09:37:33	 From  Robson Campos : https://www.chem4free.info/calculators/molarmass.htm
10:48:49	 From  Roberta Leite : chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/viewer.html?pdfurl=http%3A%2F%2Fwww.inmetro.gov.br%2FSidoq%2FArquivos%2FCGCRE%2FDOQ%2FDOQ-CGCRE-22_01.pdf&clen=149211&chunk=true
10:49:42	 From  Roberta Leite : É este doc Robson?
11:00:48	 From  Robson Campos : oi