Question

Сколько атомов кислорода содержится в 5 г углекислого газа?

Answer 1

CO2 у O оам= 12 в соединении с CO2 оам O=24
24x5=120

Answer 2

Calculating the Number of Oxygen Atoms in 5g of Carbon Dioxide

To calculate the number of oxygen atoms in 5g of carbon dioxide, we can use the concept of moles and Avogadro's number.

Step 1: Calculate the Number of Moles of Carbon Dioxide The molar mass of carbon dioxide (CO2) is approximately 44.01 g/mol.

Using the formula: Number of moles = Mass / Molar mass

We can calculate the number of moles of carbon dioxide in 5g: Number of moles = 5g / 44.01 g/mol

Step 2: Calculate the Number of Oxygen Atoms Since there are 2 oxygen atoms in 1 molecule of carbon dioxide, we can use Avogadro's number to find the total number of oxygen atoms.

Avogadro's number is approximately 6.022 x 10^23 atoms/mol.

Number of oxygen atoms = Number of moles of CO2 * 2 * Avogadro's number

Now, let's calculate the number of oxygen atoms in 5g of carbon dioxide.

Calculation

Number of moles of CO2 = 5g / 44.01 g/mol = 0.1136 mol Number of oxygen atoms = 0.1136 mol * 2 * 6.022 x 10^23 atoms/mol = 1.37 x 10^23 atoms

Answer: The number of oxygen atoms in 5g of carbon dioxide is approximately 1.37 x 10^23 atoms.