B) a partir de 50 ml d'une solution de concentration donnée, vous préparez 750 mil d'une solution
diluée d'une concentration de 6,0 g/l. quelle était la concentration della solutionintfale
g=
1
g/l
c) vous disposez de 75,0 ml d'une solution d'une concentration de 30,0% vv vous devez ajouter
de l'eau pour diluer cette solution jusqu'à une concentration de 5.00% wv quel volume deas

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally