instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Respiratory acidosis is considered to be problematic because excess co2 in blood.
answer:
Why is respiratory acidosis considered to be problematic?


question:
Ionic compounds contain cations and anions rather than discrete neutral molecules.
answer:
Ionic compounds contain cations and anions rather than what?


question:
You call a pure substance that cannot be broken down into different types of substances a(n) element.
answer:
What do you call a pure substance that cannot be broken down into different types of substances?