COM Un des programmes d'action de l'agroécologie est de réduire l'utilisation de produits
phytosanitaires tels que la bouillie bordelaise, dont le principe actif est le sulfate de cuivre
(II) de formule CuSO4.
Un producteur de pêches mélange 10 g d'ions cuivre (Cu2+) à un litre d'eau. Il épand la
bouillie bordelaise à raison de 20 mL par kilogramme de terre.
1) Calculer la masse d'ions cuivre (II) par kilogramme de terre.
2) En déduire la quantité de matière d'ions cuivre (II) par kilogramme de terre.
3) Un règlement de l'Union européenne fixe la valeur maximale tolérée pour les
épandages de solutions contenant des ions cuivre (11): 2,5 x 10-3 mol d'ions cuivre par
kilogramme de terre.
Dire si ce producteur respecte le règlement européen. Justifier.​

answer:

do it yourself roach

explanation:

where are the other pictures

answer:

hello, after writing this text in french i have to translate it into english. to those who will take the trouble to me.

before arriving at the museum, we notice a charming alley, with its stream, breathtaking greenery, hundred-year-old trees, ducks and geese, sculptures of different themes.

this museum takes up the entire history of electricity from its beginning to the present day, we appreciate the exhibitions and the references to those who were the first to master electricity and exhibit many ancient instruments of electric hope. many films and audio recording available to explain the operation of the devices and each and translated into 3 languages. (english, french, german). the explanations are simple and can be understood even by a young audience. many games and experiences are available for self-made throughout the visit. the animation around static electricity is well done and generally delights children. there is also the "nostalgia" part in which we can find the household appliances of our youth, that of our parents, or even our grandparents. the setting is warm, informative and entertaining. the museum is quite well done in all. it provides useful knowledge about electricity.

explanation: