Please help Predict which precipitate, if any, will form in the following double replacement reactions or write “None”.
a. AgNO3(aq) + NaCl(aq) →
b. CaCl2(aq) + Na2CO3(aq) →
c. Fe(NO3)3(aq) + KCl(aq) →
d. Pb(NO3)2(aq) + HCl(aq) →
e. Cu(NO3)2 + Na2S →

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.