Question

Hcl количеством вещества 5 моль реагирует с Zn. Вычислите массу и обьём водорода и массу образовавшейся соли

Answer 1

Составить хим. реакцию HCl+Zn=ZnCl2+H2
далее надо составить уравнение через x-подставив то, что уже известно, а за x взять то, что не известно. Решение уравнения и будет ответом.

Answer 2

Calculation of Mass and Volume of Hydrogen and Mass of Formed Salt

To calculate the mass and volume of hydrogen and the mass of the formed salt when 5 moles of HCl react with Zn, we need to use the balanced chemical equation for the reaction between HCl and Zn.

The balanced chemical equation for the reaction is:

2 HCl + Zn → ZnCl2 + H2

From the balanced equation, we can see that 2 moles of HCl react with 1 mole of Zn to produce 1 mole of ZnCl2 and 1 mole of H2.

Given that the amount of substance (moles) of HCl is 5, we can calculate the amount of substance (moles) of ZnCl2 and H2 produced.

The amount of substance (moles) of ZnCl2 formed is equal to the amount of substance (moles) of HCl used, which is 5 moles.

The amount of substance (moles) of H2 formed is also equal to the amount of substance (moles) of HCl used, which is 5 moles.

To calculate the mass of hydrogen and the mass of the formed salt, we need to know the molar mass of hydrogen (H) and zinc chloride (ZnCl2).

The molar mass of hydrogen (H) is approximately 1 g/mol.

The molar mass of zinc chloride (ZnCl2) can be calculated by summing the molar masses of zinc (Zn) and chlorine (Cl). The molar mass of zinc (Zn) is approximately 65.38 g/mol, and the molar mass of chlorine (Cl) is approximately 35.45 g/mol. Therefore, the molar mass of zinc chloride (ZnCl2) is approximately 65.38 + 2 * 35.45 = 136.28 g/mol.

Now we can calculate the mass of hydrogen and the mass of the formed salt.

The mass of hydrogen is equal to the amount of substance (moles) of hydrogen multiplied by the molar mass of hydrogen. Since the amount of substance (moles) of hydrogen is 5 moles and the molar mass of hydrogen is approximately 1 g/mol, the mass of hydrogen is 5 * 1 = 5 g.

The mass of the formed salt (ZnCl2) is equal to the amount of substance (moles) of ZnCl2 multiplied by the molar mass of ZnCl2. Since the amount of substance (moles) of ZnCl2 is 5 moles and the molar mass of ZnCl2 is approximately 136.28 g/mol, the mass of the formed salt is 5 * 136.28 = 681.4 g.

Therefore, the mass of hydrogen is 5 g, the mass of the formed salt (ZnCl2) is 681.4 g, and the volume of hydrogen can be calculated using the ideal gas law if the temperature and pressure are known.

Please note that the volume of hydrogen cannot be determined without knowing the temperature and pressure of the system.