B because there are 12 electron pairs in C03(-2) and 12 pairs=24
<span>the distance between peaks of a wave</span>
<span>Distillation, filtration, evaporation are some of the techniques by which mixtures can be resolved into their components.Distillation is the process of separating the component or substances from a liquid mixture by selective evaporation and condensation.Filtration is any of various mechanical, physical or biological operations that separate solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass.Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance.</span>
See the image below.
Here are the points to remember.
1. The number of protons (atomic number) is the same whether an atom is neutral or ionic.
2. In a neutral atom, the number of electrons = the number of protons.
3. The number of electrons in each shell is 2, 8, 8, 18, 18, …
4. The number of electrons in an atom at the end of each period (a noble gas) is 2, 10, 18, 36, 54, …
5. An atom will gain or lose electrons to achieve a noble gas configuration.
For example, a potassium atom has 19 protons and 10 electrons. It will form an ion by losing one electron to get to 18 electrons.
35.9 g of PCl₅ will be required to produce produce 12.6 g of HCl.
<h3>Equation of the reaction</h3>
The equation of the reaction is given below:
PCl₅ + H2O ---> POCl₃ + 2 HCl
<h3>How to calculate grams of PCl₅ required to produce 12.6 g of HCl</h3>
Molar mass of PCl₅ = 208.5 g
Molar mass of Hcl = 36.5 g
Moles of HCl = mass / molar mass
Moles of HCl = 12.6 / 36.5
moles of HCl = 0.345 moles
2 moles of HCl are produced by 1 mole of PCl₅
0.345 moles of HCl will be produced by 0.345/2 = 0.1725 moles of PCl₅
Mass of 0.1725 moles of PCl₅ = 0.1725 * 208.5 = 35.9 g of PCl₅
Mass of PCl₅ = 35.9 g of PCl₅
Therefore, 35.9 g of PCl₅ will be required to produce produce 12.6 g of HCl.
Learn more about mass and molar mass at: brainly.com/question/15476873