Question

Расчитайте молярные массы воды H2O, углекислого газа CO2, серной кислоты H2SO4, сероводорода H2S

Answer 1

Молярная масса считается из суммы атомных масс всех элементов, входящих в вещество. При этом, если после элемента в формуле стоит индекс, его атомная масса умножается на него при подсчёте.
М(Н2О) = 2*1 + 16 = 18 г/моль
М(СО2) = 12 + 2*16 = 44 г/моль
М(Н2SO4) = 2*1 + 32 + 4*16 = 98 г/моль
M(H2S) = 2*1 + 32 = 34 г/моль

Answer 2

Calculation of Molar Masses

To calculate the molar masses of the given compounds, we need to sum up the atomic masses of the elements in each compound.

1. Water (H2O): - The molar mass of hydrogen (H) is approximately 1.008 g/mol. - The molar mass of oxygen (O) is approximately 16.00 g/mol. - Therefore, the molar mass of water (H2O) is approximately 18.02 g/mol.

2. Carbon Dioxide (CO2): - The molar mass of carbon (C) is approximately 12.01 g/mol. - The molar mass of oxygen (O) is approximately 16.00 g/mol. - Therefore, the molar mass of carbon dioxide (CO2) is approximately 44.01 g/mol.

3. Sulfuric Acid (H2SO4): - The molar mass of hydrogen (H) is approximately 1.008 g/mol. - The molar mass of sulfur (S) is approximately 32.07 g/mol. - The molar mass of oxygen (O) is approximately 16.00 g/mol. - Therefore, the molar mass of sulfuric acid (H2SO4) is approximately 98.09 g/mol.

4. Hydrogen Sulfide (H2S): - The molar mass of hydrogen (H) is approximately 1.008 g/mol. - The molar mass of sulfur (S) is approximately 32.07 g/mol. - Therefore, the molar mass of hydrogen sulfide (H2S) is approximately 34.08 g/mol.

Please note that the molar masses provided are approximate values and may vary slightly depending on the isotopic composition of the elements.