How many molecules are in a 23.45g sample of Cu(OH)2? The molar mass of CuOH2 is 97.562g/mol. Express answer to correct number of significant figures and include all steps used to get answer

Name the element in group 17, period 2. (periodic table)

Convert .347 kilometers to miles show your work

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 !