Question

Обчисліть кількість атомів О у вуглекислому газі СО2 масою 8.8 г. Які величини ви визначали у розв'язані задачі і які чисельні значення отримали?​

Answer 1

Ответ:

2,408*10^23

Объяснение:

8,8:44=0.2

0,2*6.02*10^23*2=2,408*10^23

Answer 2

Calculation of the Number of Oxygen Atoms in Carbon Dioxide (CO2)

To calculate the number of oxygen atoms in carbon dioxide (CO2) with a mass of 8.8 g, we need to use the concept of molar mass and Avogadro's number.

1. Determine the molar mass of carbon dioxide (CO2): - Carbon (C) has a molar mass of approximately 12.01 g/mol. - Oxygen (O) has a molar mass of approximately 16.00 g/mol. - Since carbon dioxide (CO2) has one carbon atom and two oxygen atoms, its molar mass is calculated as follows: Molar mass of CO2 = (1 * molar mass of C) + (2 * molar mass of O)

2. Calculate the number of moles of carbon dioxide (CO2): - The number of moles can be calculated using the formula: Moles = Mass / Molar mass - Substituting the given mass of 8.8 g and the molar mass of CO2, we can calculate the number of moles of CO2.

3. Determine the number of oxygen atoms: - Since there are two oxygen atoms in one molecule of carbon dioxide (CO2), we can multiply the number of moles of CO2 by 2 to get the number of oxygen atoms.

Let's perform the calculations:

1. Molar mass of CO2: - Molar mass of C = 12.01 g/mol - Molar mass of O = 16.00 g/mol - Molar mass of CO2 = (1 * 12.01 g/mol) + (2 * 16.00 g/mol) = 44.01 g/mol

2. Number of moles of CO2: - Moles = Mass / Molar mass = 8.8 g / 44.01 g/mol = 0.1999 mol (rounded to four decimal places)

3. Number of oxygen atoms: - Since there are two oxygen atoms in one molecule of CO2, we multiply the number of moles of CO2 by 2: Number of oxygen atoms = 0.1999 mol * 2 = 0.3998 mol (rounded to four decimal places)

Therefore, the number of oxygen atoms in 8.8 g of carbon dioxide (CO2) is approximately 0.3998 mol.

Please note that the numerical values provided are rounded to four decimal places for simplicity.