Le trimix est un mélange de gaz utilisé pour la plongée. • À partir des masses de chaque gaz contenu dans la bou teille, calculer le pourcentage en volume de chaque gaz dans le trimix.

Données

Pour une bouteille de 12 kg:

• masse de dioxygène : 3,3 kg;

• masse d'hélium : 600 g; • masse de diazote : 8,1 kg.

Masse volumique du gaz à pression atmosphérique:

. p(0.) =

1,33 g L-;

• p(N2) = 1,17 g L-'; .

• (He) = 0,17 g L

1.aluminum chloride (alcl3), and sodium hydroxide (naoh) can react to form aluminum hydroxide (al(oh)3) and sodium chloride (nacl).    you have 13.4 g of aluminum chloride and 10.0 g of sodium hydroxide. answer the following questions: •what is the balanced equation for this reaction? •if you use all 13.4 g of aluminum chloride, how many grams of aluminum hydroxide can be formed? work must be shown to earn credit •if you use all 10.0 g of sodium hydroxide, how many grams of aluminum hydroxide can be formed? work must be shown to earn credit •how many grams of aluminum hydroxide will actually be made?     which reagent is limiting? explain your answer.

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Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?