Question

Рассчитайте относительные молекулярные массы веществ:Мr(O3);Mr(NH3);Mr(C2H2);Mr(H2O2);Mr(SO3);Mr(SO2);Mr(PH3);Mr(H2S)

Answer 1

Mr(O3)=48
Mr(NH3)=17
Mr(C2H2)=26
Mr(H2O2)=34
Mr(SO3)=80
Mr(SO2)=64
Mr(PH3)=34
Mr(H2S)=34

Answer 2

Calculation of Relative Molecular Masses:

To calculate the relative molecular masses of the substances mentioned, we need to determine the atomic masses of the elements present in each compound and then sum them up.

1. Ozone (O3): - Atomic mass of oxygen (O) = 16.00 g/mol - Relative molecular mass of ozone (Mr(O3)) = (3 * 16.00) g/mol = 48.00 g/mol 2. Ammonia (NH3): - Atomic mass of nitrogen (N) = 14.01 g/mol - Atomic mass of hydrogen (H) = 1.01 g/mol - Relative molecular mass of ammonia (Mr(NH3)) = (1 * 14.01) + (3 * 1.01) g/mol = 17.03 g/mol 3. Acetylene (C2H2): - Atomic mass of carbon (C) = 12.01 g/mol - Atomic mass of hydrogen (H) = 1.01 g/mol - Relative molecular mass of acetylene (Mr(C2H2)) = (2 * 12.01) + (2 * 1.01) g/mol = 26.04 g/mol 4. Hydrogen Peroxide (H2O2): - Atomic mass of oxygen (O) = 16.00 g/mol - Atomic mass of hydrogen (H) = 1.01 g/mol - Relative molecular mass of hydrogen peroxide (Mr(H2O2)) = (2 * 1.01) + (2 * 16.00) g/mol = 34.02 g/mol 5. Sulfur Trioxide (SO3): - Atomic mass of sulfur (S) = 32.07 g/mol - Atomic mass of oxygen (O) = 16.00 g/mol - Relative molecular mass of sulfur trioxide (Mr(SO3)) = 32.07 + (3 * 16.00) g/mol = 80.06 g/mol 6. Sulfur Dioxide (SO2): - Atomic mass of sulfur (S) = 32.07 g/mol - Atomic mass of oxygen (O) = 16.00 g/mol - Relative molecular mass of sulfur dioxide (Mr(SO2)) = 32.07 + 16.00 + 16.00 g/mol = 64.07 g/mol 7. Phosphine (PH3): - Atomic mass of phosphorus (P) = 30.97 g/mol - Atomic mass of hydrogen (H) = 1.01 g/mol - Relative molecular mass of phosphine (Mr(PH3)) = 30.97 + (3 * 1.01) g/mol = 33.04 g/mol 8. Hydrogen Sulfide (H2S): - Atomic mass of sulfur (S) = 32.07 g/mol - Atomic mass of hydrogen (H) = 1.01 g/mol - Relative molecular mass of hydrogen sulfide (Mr(H2S)) = (2 * 1.01) + 32.07 g/mol = 34.09 g/mol

Summary of Relative Molecular Masses:

- Mr(O3) = 48.00 g/mol - Mr(NH3) = 17.03 g/mol - Mr(C2H2) = 26.04 g/mol - Mr(H2O2) = 34.02 g/mol - Mr(SO3) = 80.06 g/mol - Mr(SO2) = 64.07 g/mol - Mr(PH3) = 33.04 g/mol - Mr(H2S) = 34.09 g/mol

Please note that the values provided are approximate and may vary slightly depending on the atomic masses used.