Question

Сколько молекул содержится в 12,5 г оксида углерода (IV)?

Answer 1

Ответ:

Сколько моль в 6,6 г оксида углерода (4)?

✅по таблице Менделеева определим молярную масса углерода и кислорода,затем сложим их

✅по формуле n=m/M

Найдём количество вещества (массу разделим на молярную массу вещества)

✅n(СО2)=6,6г/(12+16*2)г/моль=1,5 моль

Answer 2

Calculating the Number of Molecules in 12.5g of Carbon Dioxide (CO2)

To calculate the number of molecules in 12.5g of carbon dioxide (CO2), we can use the following steps:

1. Determine the Molar Mass of Carbon Dioxide (CO2): - The molar mass of carbon dioxide (CO2) can be calculated by adding the atomic masses of carbon (C) and two oxygen (O) atoms.

2. Calculate the Number of Moles: - Using the molar mass of carbon dioxide (CO2), we can calculate the number of moles in 12.5g of CO2.

3. Use Avogadro's Number to Find the Number of Molecules: - Once we have the number of moles, we can use Avogadro's number to find the number of molecules in 12.5g of CO2.

Calculation Steps

1. Determine the Molar Mass of Carbon Dioxide (CO2): - The molar mass of carbon dioxide (CO2) is calculated as follows: - Molar mass of C = 12.01 g/mol - Molar mass of O = 16.00 g/mol - Total molar mass of CO2 = 12.01 + 2(16.00) = 44.01 g/mol.

2. Calculate the Number of Moles: - To find the number of moles in 12.5g of CO2, we use the formula: - Number of moles = Mass (g) / Molar mass (g/mol) - Number of moles = 12.5g / 44.01 g/mol = 0.284 moles.

3. Use Avogadro's Number to Find the Number of Molecules: - Avogadro's number is 6.022 x 10^23 molecules/mol. - Number of molecules = Number of moles * Avogadro's number - Number of molecules = 0.284 moles * 6.022 x 10^23 molecules/mol = 1.71 x 10^23 molecules.

Answer

Therefore, there are approximately 1.71 x 10^23 molecules in 12.5g of carbon dioxide (CO2).