A level Chem help
I’m really struggling on this question... the answer is sodium but I’m really not sure how... would really appreciate some help
A sample of gallium, Ar=69.7, was analysed and was found to consist of 65% of 69 Ga and one other isotope.
Determine the mass number of the other isotope in the sample of gallium
A sample of gallium, Ar=69.7, was analysed and was found to consist of 65% of 69 Ga and one other isotope.
Determine the mass number of the other isotope in the sample of gallium
The answer is 71, not sodium
Original post by 13hasane
Yes you’re right
How did u get that answer
I read the mark scheme wrong
How did u get that answer
I read the mark scheme wrong
There are only 2 isotopes, so if the abundance of one is 65%, the abundance of the other is ....
Then write an equation to find the mass number of the unknown isotope
Original post by 13hasane
What is the equation
You should be able to write it
where x is the mass number of the other isotope
You need to solve for x (x = 71)
Quick Reply
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