Question

Mr(MgO)= Mr(ZnO)- Mr(H2S)​

Answer 1

Ответ:

я не знаю что писать

вроде правельно

Answer 2

The equation you've provided seems to be a chemical equation representing a reaction involving the compounds magnesium oxide (MgO), zinc oxide (ZnO), and hydrogen sulfide (H2S). The equation appears to be stating that the molar mass of magnesium oxide (MgO) is equal to the molar mass of zinc oxide (ZnO) minus the molar mass of hydrogen sulfide (H2S).

To calculate the molar mass of each compound:

1. MgO (Magnesium Oxide):

   • Mg has a molar mass of approximately 24.31 g/mol.
   • O has a molar mass of approximately 16.00 g/mol.

   So, the molar mass of MgO is: Molar Mass(MgO) = (1 * Molar Mass(Mg)) + (1 * Molar Mass(O)) Molar Mass(MgO) = (1 * 24.31 g/mol) + (1 * 16.00 g/mol) Molar Mass(MgO) = 40.31 g/mol

2. ZnO (Zinc Oxide):

   • Zn has a molar mass of approximately 65.38 g/mol.
   • O has a molar mass of approximately 16.00 g/mol.

   So, the molar mass of ZnO is: Molar Mass(ZnO) = (1 * Molar Mass(Zn)) + (1 * Molar Mass(O)) Molar Mass(ZnO) = (1 * 65.38 g/mol) + (1 * 16.00 g/mol) Molar Mass(ZnO) = 81.38 g/mol

3. H2S (Hydrogen Sulfide):

   • H has a molar mass of approximately 1.01 g/mol.
   • S has a molar mass of approximately 32.07 g/mol.

   So, the molar mass of H2S is: Molar Mass(H2S) = (2 * Molar Mass(H)) + (1 * Molar Mass(S)) Molar Mass(H2S) = (2 * 1.01 g/mol) + (1 * 32.07 g/mol) Molar Mass(H2S) = 34.09 g/mol

Now, let's substitute these values into your equation:

Molar Mass(MgO) = Molar Mass(ZnO) - Molar Mass(H2S) 40.31 g/mol = 81.38 g/mol - 34.09 g/mol

Solving for Molar Mass(MgO): Molar Mass(MgO) = 47.29 g/mol

So, the molar mass of magnesium oxide (MgO) is approximately 47.29 g/mol, based on the equation you provided.