Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: Molar masses can be used to determine the mass of a quantity of material.
[EX A]: What can be used to determine the mass of a quantity of material?

[EX Q]: Lead sulfate is the white solid that forms on corroded battery terminals.
[EX A]: What is the white solid that forms on corroded battery terminals?

[EX Q]: Sepals, petals, stamens, and carpels are floral organs.
[EX A]:
Sepals, petals, stamens, and carpels are what kind of organs?