Not able to be separated by physical means but is chemical what is it

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %