Question

Молекулярная массы: Mr(Na3PO4) Mr(Fe2(SO4)3 Mr(NH4)2CO3

Answer 1

Ответ:

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Answer 2

Na3PO4 - 164
Fe2(SO4)3 - 400
(NH4)2CO3 - 96

Answer 3

To calculate the molecular masses of the given chemical compounds, you need to find the sum of the atomic masses of all the atoms present in each compound. Here are the steps to calculate the molecular masses for each compound:

1. Na₃PO₄ (Sodium phosphate):

   • Na (Sodium) has a molar mass of approximately 22.99 g/mol.
   • P (Phosphorus) has a molar mass of approximately 30.97 g/mol.
   • O (Oxygen) has a molar mass of approximately 16.00 g/mol. Molecular mass = 3(Na) + 1(P) + 4(O) = 3(22.99) + 30.97 + 4(16.00) ≈ 163.94 g/mol.

2. Fe₂(SO₄)₃ (Iron(III) sulfate):

   • Fe (Iron) has a molar mass of approximately 55.85 g/mol.
   • S (Sulfur) has a molar mass of approximately 32.06 g/mol.
   • O (Oxygen) has a molar mass of approximately 16.00 g/mol. Molecular mass = 2(Fe) + 3(S) + 12(O) = 2(55.85) + 3(32.06) + 12(16.00) ≈ 399.88 g/mol.

3. (NH₄)₂CO₃ (Ammonium carbonate):

   • N (Nitrogen) has a molar mass of approximately 14.01 g/mol.
   • H (Hydrogen) has a molar mass of approximately 1.01 g/mol.
   • C (Carbon) has a molar mass of approximately 12.01 g/mol.
   • O (Oxygen) has a molar mass of approximately 16.00 g/mol. Molecular mass = 2(N) + 8(H) + 1(C) + 3(O) = 2(14.01) + 8(1.01) + 12.01 + 3(16.00) ≈ 96.09 g/mol.

Therefore, the molecular masses of the given compounds are approximately:

1. Na₃PO₄: 163.94 g/mol.
2. Fe₂(SO₄)₃: 399.88 g/mol.
3. (NH₄)₂CO₃: 96.09 g/mol.