What is the molar mass of fluorine, f2?
is it 19mol or 38mol? ? .

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?