Question

Обчислити відносні молекуляні маси для С₁₂(SO4)3, Сa3(PO4)2, CuSO3, AICI 3 СРОЧНО НАДО!!! ПЖ!!!

Answer 1

Ответ: С12(SO4)3=432

Са3(РО4)2=290

СuSO3=144

AlCl3=123,5

Объяснение: Щоб знайти молекулярну масу потрібно кількість атомів елемента помножити на масу елемента (вказана у таблиці Мендєлєєва під порядковим номером) і додати усі елементи+масу округлюємо, лише хлор Cl має масу 35,5!

Answer 2

Calculating Relative Molecular Masses

To calculate the relative molecular masses for the given compounds, we can start by determining the molar masses of the individual elements and then summing them based on the chemical formula.

1. Calcium Sulfate (Ca3(PO4)2): - Calcium (Ca) has a molar mass of 40.08 g/mol. - Phosphorus (P) has a molar mass of 30.97 g/mol. - Oxygen (O) has a molar mass of 16.00 g/mol. - Calculating the molar mass of Ca3(PO4)2: - 3 * (40.08 g/mol) + 2 * (30.97 g/mol + 4 * 16.00 g/mol) = 3 * 40.08 + 2 * (30.97 + 64.00) = 120.24 + 2 * 94.97 = 120.24 + 189.94 = 310.18 g/mol. [[1]]

2. Copper(II) Sulfite (CuSO3): - Copper (Cu) has a molar mass of 63.55 g/mol. - Sulfur (S) has a molar mass of 32.07 g/mol. - Oxygen (O) has a molar mass of 16.00 g/mol. - Calculating the molar mass of CuSO3: - 63.55 g/mol + 32.07 g/mol + 3 * 16.00 g/mol = 63.55 + 32.07 + 48.00 = 143.62 g/mol. [[2]]

3. Aluminum Chloride (AlCl3): - Aluminum (Al) has a molar mass of 26.98 g/mol. - Chlorine (Cl) has a molar mass of 35.45 g/mol. - Calculating the molar mass of AlCl3: - 26.98 g/mol + 3 * 35.45 g/mol = 26.98 + 106.35 = 133.33 g/mol. [[3]]

4. Dodecane Sulfate (C12(SO4)3): - Carbon (C) has a molar mass of 12.01 g/mol. - Sulfur (S) has a molar mass of 32.07 g/mol. - Oxygen (O) has a molar mass of 16.00 g/mol. - Calculating the molar mass of C12(SO4)3: - 12 * 12.01 g/mol + 3 * (32.07 g/mol + 4 * 16.00 g/mol) = 144.12 + 3 * (32.07 + 64.00) = 144.12 + 3 * 96.07 = 144.12 + 288.21 = 432.33 g/mol. [[4]]

Summary:

- Ca3(PO4)2: 310.18 g/mol - CuSO3: 143.62 g/mol - AlCl3: 133.33 g/mol - C12(SO4)3: 432.33 g/mol

These are the relative molecular masses for the given compounds.