Answer :

There are approximately 4.85 x 10²³ molecules in 35.5 grams of carbon dioxide.

To determine the number of molecules in 35.5 grams of carbon dioxide (CO₂), we need to use the concept of molar mass and Avogadro's number.

Calculate the molar mass of carbon dioxide (CO₂):

Carbon (C) has a molar mass of approximately 12.01 g/mol, and oxygen (O) has a molar mass of approximately 16.00 g/mol. Since carbon dioxide has two oxygen atoms, we add the molar masses together:

Molar mass of CO₂ = 12.01 g/mol (carbon) + 2 * 16.00 g/mol (oxygen) ≈ 44.01 g/mol

Determine the number of moles of CO₂ in 35.5 grams:

Number of moles = Mass of substance / Molar mass

Number of moles of CO₂ = 35.5 g / 44.01 g/mol ≈ 0.806 mol

Use Avogadro's number to find the number of molecules:

Avogadro's number (NA) is approximately 6.022 x 10²³ molecules/mol.

Number of molecules = Number of moles × Avogadro's number

Number of molecules of CO₂ ≈ 0.806 mol × 6.022 x 10²³ molecules/mol ≈ 4.85 x 10²³ molecules

So, there are approximately 4.85 x 10²³ molecules in 35.5 grams of carbon dioxide.

Learn more about carbon dioxide from the link given below.

https://brainly.com/question/3049557

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Rewritten by : Barada

Answer:

you have to use the avogadro's constant of 6.023×10^23 to calculate the number of molecules of carbon dioxide.and you also have to use the molecular mass which is 44.

35.5/44×6.023×10^23

=4.85×10^23

I hope this helps and sorry if it's wrong