Find the hydroxide ion concentration of a HBr solution with a pH of 4.75

Which statements describe molecules? Check all that apply. Molecules are made of two or more atoms. A Molecules are all the same size B Molecules range in size. C Molecules are only made of atoms of the same element.

Why do transition metals often have more than one possible ion, and why we distinguish these ions in the form of roman numerals in brackets?

What kinds of atoms are lipids mostly made of?

How do whales, bats, and dolphins use echolocation? To scare away predators To orient themselves and to find food To attract mates To tell other animals of their species where they are

Describe how the weak monoprotic acid hydrofluoric acid, HF (used in aluminum processing) acts when it is added to water, including a description of the nature of the particles in solution before and after the reaction with water.

Determine the name of the compound Li2O

Complete the reactions to show how butanoic acid may be converted to phenyl propyl ketone.

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary