Please help me asap i will mark u as and give u 10 points

7 u

Atomic mass = Mass of protons + mass of neutrons

⇒ Atomic mass = 4 u + 3 u = 7 u.

Tip: Electrons have negligible mass.

Mass of e- = 1/2000 × mass of p+.

7

Explanation:

To find the Atomic Mass, you just add the protons and neutrons together.

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.