Determine the percent composition of BF3, if a 75.0 g sample of BF3 decomposes and produces 63.1 g of fluorine and 11.9 g of boron. NEED ASAP
Select one:
a. 15.9% boron and 84.1% fluorine
b. 118.2% boron and 81.8% fluorine
c. 15.9% fluorine and 84.1% boron
d. 18.2% fluorine and 81.8% boron

that tool would be a compass

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

im doing test rn im going with 2 but ill give answer if itss wrong,   : )