You are given a stock solution of 2.0 M NaCl (the solvent is water). You want to make a dilution so that you have exactly 100mL of a 0.50 M solution of NaCl.

a) What volume of the stock NaCl solution will you need?

b)What volume of water will you need?

18

Try adding 700% because of the x in y

There are two molecules. check the attached file for the solution.

Answer: 1s²  2s²  2p⁶explanation: from the periodic table, we can note that the neutral fluorine  has 9 electrons (symbol is shown in the attached image)therefore, the configuration of neutral fluorine  is: 1s²  2s²  2p⁵now, f⁻  means that the neutral fluorine  gained one extra electron. this means that f⁻  has 10 electrons.the extra electron will occupy the 2p level to make it complete.the configuration now  is: 1s²  2s²  2p⁶comparing between both f and f⁻, we can note that f⁻  has now complete orbitals which means that it is more stable than f based on lewis postulatehope this : )