b2+ + 2 NO3- + 2 Na+ + 2 I- >> PbI2 (s) + 2 Na+ + 2 NO3-
net ionic
Pb2+ + 2 I- >> PbI2
Ksp = [Pb2+] [I-]^2
Ksp = 7.1 x 10^-9
molar solubility
let x = mol/L of Pb2+ that dissolve . This will give x mol/L Pb2+ and 2x mol/L I-
7.1 x 10^-9 = (x) (2x)^2 = 4x^3
molar solubility = 0.0012 M
~~thanks to google research~~
Answer:
Blank 1 - 2
Blank 2 - 4
Blank 3 - 3
Explanation:
The unbalanced chemical equation given in the question is as follows:
Au2O3 → Au + O2
To balance a chemical equation, the number of atoms of each element on both sides of the equation (reactants and product) must be the same. Based on this explanation, the balanced chemical equation is as follows:
2Au2O3 → 4Au + 3O2
- 4 atoms of gold (Au) on both sides
- 6 atoms of oxygen on both sides
Hence, based on the question, blank 1, 2 and 3 are 2, 4 and 3 respectively.
Density is the ratio of the substance's mass to volume. To know the effects of temperature on the density of the liquid, we must look at the mass and volume dependence. Mass is always constant, so it is not affected by temperature. For volume, generally, the molecules of the liquid occupy a greater space when heated because of the rapid collisions of the liquid molecules. Thus, as temperature increases, the volume of liquid also increases, although slightly only. That means that density would decrease.
Answer:
The study of the interaction of electrical and magnetic fields, and their interaction with matter, is called Electromagnetism