The atomic masses of the two stable isotopes of boron; boron-10 (natural abundance: 19.78%) and boron-11 (natural abundance: 80.22%) are 10.0129 amu and 11.0093 amu, respectively.  calculate the average atomic mass of boron   10.41 amu 10.95 amu 10.81 amu  10.72 amu  10.13 amu

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate