According to the law of conservation of mass, if an element a has an atomic mass of 2 mass units and element b has an atomic mass of 3 mass units, what mass would be expected for compound ab? for compound a2b3?

What are the chemical names of these compounds? ke: mg3n2: reset next

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.

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 !