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State whether the following is true or false.
A material balance problem with more unknowns than independent equations has no solution.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: C

It has infinitely many solutions rather than none, and the remedy is to supply another specification. Recognising which case you are in is what the degrees of freedom count is for. One more specification collapses the family to a single answer.

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