Consider the following precipitation reaction: 2Na3PO4 (aq) + 3CuCl2 (aq) → Cu3(PO4)2(s) +6NaCl(aq)

What volume of 0.158 M Na3PO4 solution is necessary to completely react with 88.0 mL of 0.109 M CuCl2?
(Express your answer in millimeters)

The answer for #3 is c but i don't know why

Asample of neon occupies a volume of 375 ml at stp. what will be the volume of neon if the pressure is reduced to 90.0 kpa? a. 422 ml b. 422 l c. 333 ml d. 333 l

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.