Why are food preservatives added to food?

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acetate plus acetate concentration of 250 mm and a ph of 5. what concentrations of acetic acid and sodium acetate should you use