Calculate the molar mass for HCN.

0.2703 g/mol

2.703 g/mol

27.03 g/mol

270.3 g/mol

a sample of seawater has a pH of 8. determine the new pH of the sample if the hydrogen ion concentration is increased by a factor of 100

The atomic number of an atom identifies the number of protons in its nucleus. If the overall charge on the atom is neutral, what must the atomic number also identify? A. the most common isotope's mass B.

a substance that undergoes a physical change like melting is still the same substance is it true or false

The atomic number of one particular isotope is equal to its mass number. which isotope is it?

The procedure for an experiment is

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction

What is the valence of Fluorine

When liquid helium is exposed to room temperature, it forms a gas. Which best explains why this happens? The liquid helium absorbs energy from the air in the room. The particles in the air absorb the energy of the liquid helium.

Why was Bohr's model considered more accurate than Dalton's model?

Select the statements that correctly describe a buffer. 1) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. 2) A buffer is generally made up of a weak acid and its conjugate base.