4. Which ions act as spectator ions in the reaction below? 2X3Y(aq) + 3AB(aq) → 3X2B(aq) + AzY2(s) a. X1+(aq) and Y3-(aq)
b. A2+ (aq) and Y1-(aq)
C. X1+(aq) and B2-(aq)
d. A2-(aq) and B2 (aq)

Compare and contrast physical changes with chemical changes.

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.