Select all the correct answers. Which equations represent precipitation reactions? (There is more than one correct answer)

Na2S + FeBr2 → 2NaBr + FeS

MgSO4 + CaCl2 → MgCl2 + CaSO4

LiOH + NH4I → LiI + NH4OH

2NaCl + K2S → Na2S + 2KCl

AgNO3 + NaCl → AgCl + NaNO3

May someone me with these science questions

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.