instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Red litmus paper turns blue when placed in a basic solution. Answer: blue
answer:
Red litmus paper turns what color when placed in a basic solution?

question:
Passage: Insects spread disease and destroy crops. However, they are essential for pollinating flowering plants. Answer: insects
answer:
What are essential for pollination, but can spread disease and destroy crops?

question:
Passage: The most useful quantity for counting particles is the mole. So if each coefficient is multiplied by a mole, the balanced chemical equation tells us that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia. This is the conventional way to interpret any balanced chemical equation. Answer: the mole
answer:
What is the most useful quantity for counting particles?