Question

A constant is a value in a formula that doesn't change. _______________

Answer 1

A constant is a value in a formula that does not change its value.
 For example, in the formula:
 PV = nRT
 The constant is R.
 It means that regardless of the value of the other variables, R will always remain the same.
 R: universal constant of gases.
 Answer:
 A constant is a value in a formula that does not change its value.