for 23.1 g of a mixture of trivalent metal A and its oxide reacting with hcl, 54.75g of hcl is needed to obtain 3.36 l h2 at tc find the name of metal A, calculate the mass of each product

What is the formula that this ionic compounds could form sr2+p3-o2-

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 !

Calculate the mass of 0.750 mol of the following substance. na3po4.