Use boyles law to explain what would happen to the volume

Question

Questions:

1. Use Boyle's Law to explain what would happen to the volume of a helium- filled balloon if it was carried underwater by a diver to increasing depths and higher pressure. Assume that the temperature of the gas remains constant. (Lesson 11)
2. Given the double displacement reaction below, which of the products would be soluble in water and which would likely form a solid precipitate? How do you know? (Lesson 12)

2 AgNO_3(aq) + K₂CO_{3 (aq)} → Ag₂CO₃ + KNO₃