Is water from a swimming pool a heterogeneous mixture or a homogeneous mixture

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%