On dissout dans une solution d'acide chlorhydrique 2,450 g d'un alliage de zinc et d'aluminium.

step 1 Hello everyone. So the number of the moles is equal to n equal to pv by RT, that is equal to 0 .

On dissout dans une solution d'acide chlorhydrique 2,450 g...

On dissout dans une solution d'acide chlorhydrique $2,450 \mathrm{~g}$ d'un alliage de zinc et d'aluminium. Les équations stœchiométriques sont : $$ \mathrm{Zn}+2 \mathrm{HCl}=\mathrm{ZnCl}_2+\mathrm{H}_2 \quad \text { et } \quad 2 \mathrm{Al}+6 \mathrm{HCl}=2 \mathrm{AlCl}_3+3 \mathrm{H}_2 $$ On recueille 2,397 litres de dihydrogène (volume mesuré à $0^{\circ} \mathrm{C}$ et sous $101325 \mathrm{~Pa}$ ). Quelle est la composition de cet alliage, en masses et en quantités?

On dissout dans une solution d'acide chlorhydrique $2,450 \mathrm{~g}$ d'un alliage de zinc et d'aluminium. Les équations stœchiométriques sont :
$$
\mathrm{Zn}+2 \mathrm{HCl}=\mathrm{ZnCl}_2+\mathrm{H}_2 \quad \text { et } \quad 2 \mathrm{Al}+6 \mathrm{HCl}=2 \mathrm{AlCl}_3+3 \mathrm{H}_2
$$

On recueille 2,397 litres de dihydrogène (volume mesuré à $0^{\circ} \mathrm{C}$ et sous $101325 \mathrm{~Pa}$ ). Quelle est la composition de cet alliage, en masses et en quantités?

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Key Concepts

System of Equations in Reaction Analysis

When a mixture undergoes simultaneous reactions, setting up a system of equations based on mass conservation and reaction stoichiometry is crucial. This method allows one to solve for the unknown quantities or composition of the components in the mixture.

Ideal Gas Law

The ideal gas law is a key tool in relating the pressure, volume, temperature, and number of moles of a gas. It is often used to determine the amount of gas produced or consumed in a reaction when the conditions of temperature and pressure are known.

Mole Concept

The mole concept is a fundamental principle in chemistry that allows chemists to count particles (atoms, molecules, ions) by relating them to mass via the molar mass. It is essential for converting between the mass of substances and the number of particles involved in reactions.

Stoichiometry

Stoichiometry is the branch of chemistry that uses balanced chemical equations to determine the relative amounts of reactants and products in a chemical reaction. It involves calculating the relationships between reactants and products by using mole ratios derived from the coefficients in the balanced equations.

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