What precipitate is most likely formed from a solution containing Ba2+, Na+, OH-, and Co3 2- A) NaOH
B) BAaCO3
C) Na2CO3
D) Ba(OH)2

Can someone me with questions 12 and 13 plz.

What shape would a molecule with two bound groups and two lone pairs have?

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88