How do you convert between the mass and the number of moles of a substance?

Which of the following characteristics must be present for a substance to be called a mineral?

Which is closest to the volume of 0.20 M sodium hydroxide solution could be made from 20.0 g of solid sodium hydroxide (and an unlimited supply of water) ? A. 1.0 dm3 B. 0.5 dm3 C. 0.25 dm3 D. 2.5 dm3 E. none of these

The nucleus of an atom has what electric charge?

After a mixture of iron and sulfur are heated and then cooled a magnet no longer attracts the iron how would you classify the resulting material

Approximately how many atoms of carbon are present in a 120 gram sample of carbon?

Balance the following equation _NaOH (aq) + _HNO3 (aq) > _NaNO3 (aq) + _H2O (1)

Researchers discovered a subatomic partial while working with the cathode ray tube the particle is known as

An electrochemical cell is constructed such that on one side a pure nickel electrode is in contact with a solution containing Ni2 + ions at a concentration of 2 * 10-3 M.

The lines in an element's atomic spectrum result from electron spins going in opposite directions. energy that is spread out among an atom's electrons. electrons moving from a lower to a higher energy level.

Is Jesus Christ real?