Bonding in molecules or ions that cannot be correctly represented by a single lewis structure is

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?

Are oil and water a mixture or solution