What is the valency of the metal represented by x in the compound

Question

Please i am begging i don't no how to find x of XOH

Answer 1

Example of this compound include KOH, NaOH, LiOH, etc. All of the cations are from group one. Each has a charge of one plus. The hydroxide ion, OH-, has a charge of 1-. The molecule is neutral, therefore, the cation must have a charge of 1+ because 1- + 1+ = 0.