64 g aliaj de zinc si mercur se trateaza cu o solutie de acid clorhidric de concentratie 36,5% rezultand 0,4g de hidrogen. Calculeaza compozita procentuala masica a aliajului. Nevoie de rasapunsuri repede

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.