Question

water pure substance or mixture

Answer 1

a substance which is not mix any impure substance then that is pure and anathor is mixture

Answer 2

water is a pure substance as much as pure oxygen . if you have air disolved in water, it is indeed a mixture or if you have salt dissolved. it is then a pure solution. pure degassed water is a pure substance. i hope it helps you i am not cheat to google it is given in my book