CuriousStudent Posted November 5, 2016 Share Posted November 5, 2016 The full question is: "What is the mass of 9.01 x 103 mole carbon tetrafluroide, CF4(g)?" Any help on explaining how to get the answer to this is much appreciated. Link to comment Share on other sites More sharing options...
StringJunky Posted November 5, 2016 Share Posted November 5, 2016 (edited) The full question is: "What is the mass of 9.01 x 103 mole carbon tetrafluroide, CF4(g)?" Any help on explaining how to get the answer to this is much appreciated. Do you know what a mole is? See if you can work the problem out with this definition of a mole: The mole is the unit for amount of substance. The molar mass is the relative formula mass of a substance in grams (measured in g/mol). Edited November 5, 2016 by StringJunky Link to comment Share on other sites More sharing options...
CuriousStudent Posted November 5, 2016 Author Share Posted November 5, 2016 Do you know what a mole is? I have a vague idea of what it is. I am new to the concept of molar mass and what not. Link to comment Share on other sites More sharing options...
StringJunky Posted November 5, 2016 Share Posted November 5, 2016 (edited) You need to find out the molar mass of the compound, which is in grams, and multiply that by the number of moles given. You then multiply that result with the left side of the sum. The molar mass is the combined atomic mass, expressed directly in grams, of each element in a compound. Edited November 5, 2016 by StringJunky 1 Link to comment Share on other sites More sharing options...
CuriousStudent Posted November 5, 2016 Author Share Posted November 5, 2016 Thanks, that helped more then what my textbook can explain to me. Link to comment Share on other sites More sharing options...
StringJunky Posted November 5, 2016 Share Posted November 5, 2016 Thanks, that helped more then what my textbook can explain to me. No problem. Link to comment Share on other sites More sharing options...
Sensei Posted November 5, 2016 Share Posted November 5, 2016 (edited) You need to find out the molar mass of the compound, which is in grams, and multiply that by the number of moles given. Molar mass is in [math]\frac{g}{mol}[/math] units. After multiplication by moles, you get simple grams, because mol^-1 (denominator in g/mol) and mol cancel each other. [math]\frac{g}{mol} * mol = g[/math] The molar mass is the combined atomic mass, expressed directly in grams, of each element in a compound. Atomic mass is in a.m.u (mass atomic unit), shortcut u. It's approximately 1.66*10^-27 kg. After multiplication by 1000 (to get grams) and multiplication it by Na (Avogadro constant), you get g/mol. Which is very large number of atoms or molecules (6.022141*10^23). f.e. 12 u * 1.66*10^-27 kg/u * 1000 g/kg * 6.022141*10^23 mol^-1 = 12 g/mol Edited November 5, 2016 by Sensei 1 Link to comment Share on other sites More sharing options...
Sriman Dutta Posted November 5, 2016 Share Posted November 5, 2016 Is CF4 carbon tetrafluoride ?? Link to comment Share on other sites More sharing options...
CuriousStudent Posted November 5, 2016 Author Share Posted November 5, 2016 Is CF4 carbon tetrafluoride ?? Yes. Link to comment Share on other sites More sharing options...
StringJunky Posted November 5, 2016 Share Posted November 5, 2016 Is CF4 carbon tetrafluoride ?? Tetra means 4. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now