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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: thetruenash on November 22, 2007, 10:35:12 AM

Title: Mass to Charge Ratio
Post by: thetruenash on November 22, 2007, 10:35:12 AM

Determine appoximate mass-to charge ratios for the following ions.
A) 80     -       (Bromine 80 with a minus charge)
        Br
B) 18    2-     (Oxygen 18 with a -2 charge)
        O
C) 40    +
       Ar                (Argon 40 with a plus charge)
Why are these values only approximate?(Hint: What are the masses of these ions?"
Then answers are  a)8.3E-7 kg/C  b) 9.3E-8 kg/C    c) 4.1E-7
What is the process of solving this?

Title: Re: Mass to Charge Ratio
Post by: AWK on November 22, 2007, 10:48:34 AM

Quote

Determine appoximate mass-to charge ratios

You should assume masses of ions are the same as masses of atoms

Title: Re: Mass to Charge Ratio
Post by: thetruenash on November 22, 2007, 11:37:55 AM

umm im still not sure what to do. Can you do letter A for me?

Title: Re: Mass to Charge Ratio
Post by: AWK on November 22, 2007, 12:57:44 PM

Do you know the Faraday constant - it is a content of 1 mole of electrons. Since you have SI units kg/C
use 0.080 kg of Br / 96500 C