How many moles of sodium chloride are present in 1.0 l of a 5.5 m solution of sodium chloride in water?

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

How many grams of mgbr2 are needed to produce 75g or metal?