Which of the following is the closest to the observed abundance of 71ga, one of two stable gallium isotopes (69ga and 71ga). the answer in the book shows 40%, and i have absolutely no idea how to solve this. !

The grooves or folds of the brain are called

Tell me the iupac name of the following compounds:

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 !