Manganese, Mn, forms a number of oxides. A particular oxide is 77.4% Mn. What is the simplest empirical formula for this oxide?

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

Asolid that forms and separates from a liquid mixture is called

Is 343 in the sequence -5, -2, 1, 4, 7