Composition de la molécule Hasi
Une bouteille contient du peroxyde d'hydrogène dont la formule chimique est H, O,, Claire affirme:
«Puisque l'eau (H,0) est comestible et non toxique, le peroxyde d'hydrogène
le sera aussi, car on a seulement ajouté un atome d'oxygène à la molécule d'eau.
Or, l'oxygène n'est pas dangereux pour la santé. On peut donc consommer
sans crainte du peroxyde d'hydrogène.»
Que penses-tu de cette affirmation?

As you move from right to left on the periodic table the atomic radius fill in the blank

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1