question 1 answer: p/q can be terminating when q = 5^m * 2^n
question 2 answer: -1 and -1
question 3 answer: -4
question 4 answer: 5/12
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Another question on Mathematics
Mathematics, 21.06.2019 17:30
The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]