Can someone please help me with #12 please

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

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

Stage in which a star’s outer layers have started to cool and grow outward?