Answer:
The substance is a mixture because it left a white powder in the beaker when boiled.
Explanation:
<span>The answer is two or more hours. An extended water interruption is considered to be two or more hours longer. An extended water interruption may be caused by different factors, such as cleaning or longer fixing time of any water pipes, which may cause extended water interruption</span>
Cells are composed of water, inorganic ions<span>, and carbon-containing (organic) molecules. Water is the most abundant molecule in cells, accounting for 70% or more of total cell mass.</span>