what is the empirical formula of stannous fluoride, the first fluoride compound added to toothpaste to protect teeth against decay? its mass percent composition is 24.25% f, 75.75% sn.

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?

How many moles of potassium are needed to react completely with 12.8 moles of magnessium bromide?

What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?