Please solve this asap! Thanks. Pb(NO3)2 + Na3PO4

Explaining the process would be very helpful too. Thanks again.

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

How many moles of gas are present if p=11 atm, v=12l, t=185k?

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as