Ce cantitate de zahăr este necesară pentru a prepara 100 g soluţie cu concentraţie 5%?

Concerning the 10.0 ml of 0.50 m nacl to 100 ml of solution: when a solution is diluted, does it change the number of moles dissolved?

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.