How do you convert 1.806 x 10^23 molecules of cl2 to moles

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel