How many particles are in a 172 g sample of Cu2O3? A: 5.89 x 1023 particles Cu2O3
B: 5.03 x 1023 particles Cu2O3
C: 5.03 x 1024 particles Cu2O3
D: 5.89 x 1024 particles Cu2O3

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?

What must occur for air masses to form fronts

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.