Can we install a thermometer inside a flask containing reaction mixture $($the thermomter is in contact with reaction solution to measure the temperature correctly$),$ the reaction also needs a condenser, then degas that flask and fill the flask with inert gas by Schlenk line? If yes, please draw the picture to show how you set up this experiment $($use $2-$neck flask or $3$ neck flask? Where should the condenser, the thermometer connect? Where should be the neck to do vacuum and inert gas exchange?$)$ If not, please explain the reason why we can't use a thermometer while working with Schlenk line.