An element called X consists of four isotopes A, B, C and D. Their relative atomic masses are 67.0, 68.0, 66.0 and 64.0, respectively. The relative ratios of A, B and C are 1: 4: 7, respectively. If the relative atomic mass of the element is 65.4, calculate the relative abundance of the four isotopes??? please help me​

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

i don,t know so just answer mine

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.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.