Question

Найти малекулярную массу Mr: H2O2, H3PO4, CO2

Answer 1

H2O2=2+(2*16)=34г/моль

H3PO4=3+31+(4*16)=98 г/моль

CO2=12+(16*2)=44 г/моль

Answer 2

Molecular Mass of H2O2

The molecular formula for hydrogen peroxide is H2O2. To calculate its molecular mass (Mr), we need to determine the atomic masses of hydrogen (H) and oxygen (O) and multiply them by their respective subscripts in the formula.

The atomic mass of hydrogen (H) is approximately 1 gram per mole (g/mol), and the atomic mass of oxygen (O) is approximately 16 g/mol.

Therefore, the molecular mass of H2O2 can be calculated as follows:

M(H2O2) = (2 * M(H)) + (2 * M(O)) = (2 * 1 g/mol) + (2 * 16 g/mol) = 2 g/mol + 32 g/mol = 34 g/mol

So, the molecular mass of H2O2 (hydrogen peroxide) is 34 g/mol.

Molecular Mass of H3PO4

The molecular formula for phosphoric acid is H3PO4. To calculate its molecular mass (Mr), we need to determine the atomic masses of hydrogen (H), phosphorus (P), and oxygen (O) and multiply them by their respective subscripts in the formula.

The atomic mass of hydrogen (H) is approximately 1 g/mol, the atomic mass of phosphorus (P) is approximately 31 g/mol, and the atomic mass of oxygen (O) is approximately 16 g/mol.

Therefore, the molecular mass of H3PO4 can be calculated as follows:

M(H3PO4) = (3 * M(H)) + M(P) + (4 * M(O)) = (3 * 1 g/mol) + 31 g/mol + (4 * 16 g/mol) = 3 g/mol + 31 g/mol + 64 g/mol = 98 g/mol

So, the molecular mass of H3PO4 (phosphoric acid) is 98 g/mol.

Molecular Mass of CO2

The molecular formula for carbon dioxide is CO2. To calculate its molecular mass (Mr), we need to determine the atomic masses of carbon (C) and oxygen (O) and multiply them by their respective subscripts in the formula.

The atomic mass of carbon (C) is approximately 12 g/mol, and the atomic mass of oxygen (O) is approximately 16 g/mol.

Therefore, the molecular mass of CO2 can be calculated as follows:

M(CO2) = M(C) + (2 * M(O)) = 12 g/mol + (2 * 16 g/mol) = 12 g/mol + 32 g/mol = 44 g/mol

So, the molecular mass of CO2 (carbon dioxide) is 44 g/mol.

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