How many mg is 45 meq of sodium?

To convert milliequivalents (mEq) of sodium to milligrams (mg), you need to know the atomic weight of sodium. The atomic weight of sodium is approximately 23 g/mol. So, to convert 45 mEq of sodium to mg, you would multiply 45 mEq by the atomic weight (23 g/mol) to get 1035 mg.