Who first proposed that matter is composed of tiny, indivisible particles?

If 18.9 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia?

Which of the following is smaller than the atomic radius of beryllium? a. the ionic radius of beryllium b. the atomic radius of lithium c. the ionic radius of carbon d. the atomic radius of magnesium

The r group or side chain of the amino acid serine is - ch2 - oh. the r group or side chain of the amino acid alanine is - ch3. where would you expect to find these amino acids in a globular protein in aqueous solution?

The molecule CO2 is arranged in a linear molecular geometry. TRUE FALSE

Calculate the number of molecules in 1.8 moles of Oxygen (O2).

A fog over a lake. what two changes of state must occur to produce the fog? do the water molecules absorb or release energy during these changes of state? what happens to the motion of the water molecules as a result?

Limes have a [H3O+] of 1.3 x 10-2 mol/L. Their pOH is

The human body is 0.0040% iron. How many milligrams of iron does a 165 pound person contain?

Which of the following is the correct Lewis structure for ammonia (NH3) ? Note: Hydrogen and nitrogen have one and five valence electrons respectively.

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.