How many moles would 1.00 x 10^23 molecules of methane (CH^4) represent?

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

What is an example of a physical property?

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !