19 Apprends d'une erreur Un objet de nature inconnue
S03 Développer des modèles simples
Afin de déterminer la nature d'un objet inconnu trouvé
dans le grenier de son grand-père, Louis souhaite mesu-
er sa masse volumique. Pour cela, il fait les mesures
ci-dessous et il trouve comme valeur 0,75 kg/cm3.
= 40 mL
2
V, = 20 ml
= 159
La valeur de masse volumique déterminée par Louis
est-elle correcte ?​

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?