If 25.8 grams of bao dissolve in enough water to make a 212-gram solution, what is the percent by mass of the solution?

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 !

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn