La couleur argentée dans les feux d’artifice est obtenue en réalisant la combustion de l’aluminium. Le produit
de la réaction est l’alumine Al
2
O
3(s)
.
On réalise en laboratoire la combustion de l’aluminium
Al
(s)
dans le dioxygène O
2(g)
pour les deux systèmes
suivants.

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

Which governments provide garbage collection services to homes and businesses

What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus