Post a New Question

chemistry

posted by .

I'm having a little trouble doing a worksheet.

1.25 moles of KBr contains how many Br atoms?

How do I find the number of atoms for one of them?

Also, I'm not sure how to solve:

Calculate the number of atoms in CO2.

Thanks.

  • chemistry -

    Is that 1.25 or the #1 problem that has 0.25 mols. I'll assume it is 1.25 moles.
    1 mole KBr contains 6.02 x 10^23 molecules of KBr so there will be 6.02 x 10^23 x 1.25 = ?? molecules of KBr. You can see that each molecule of KBr contains 1 Br ion. Technically, there aren't ANY Br ATOMS but I think the intent of the problem is to solve for Br ions and call those atoms.
    How much CO2? 1 kg, 1 mg, 1 rail car? There are 3 atoms per molecule of CO2; 2 atoms of oxygen and 1 atom of C to make 3 atoms total per molecule CO2.

  • chemistry -

    Thank you for answering my question. The atom part in the last part was the only thing that confused me. Much appreciated.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question