Question

When a metal X is treated with cold water it gives a basic salt Y with molecular formula XOH( molecular mass 40 ) and libertes a gas Z which easily catches fire identify X,Y,and Z

Answer 1

X is sodium as molecular mass of OH ion is 17 and sodium atomic mass is 23 so adding both gives 40 which molecular mass is given

Y is sodun hydroxide

sodium+water------- sodium hydroxide + hydrogen gas

so Z is hydrogen gas

Answer 2

Answer:

X= NaOH

Y= Sodium hydroxide

Z= Hydrogen