Suppose two elements X and Y combine to form two compound `XY_2 and X_2Y_3` weigh `85g`. The atomic masses of X and Y are respectively :

Suppose two elements X and Y combine to form two compounds XY_(2) and X_(2)Y_(3) when 0.05 mole of XY_(2) weight 5g while 3.011xx10^(23) molecules of X_(2)Y_(3) weight 85g . The atomic masses of X and Y are respectively.

Two elements X (at.mass 16) and Y (at.mass 14) combine to form compounds A,B and C . The ratio be different masses of Y which combine with a fixed mass of X in A,B and C is 1 : 3 : 5. If 32 parts by mass of X combines with 84 parts by mass of Y in B then in C,16 parts by mass of X will combine with :

Two elements X( atomic weight =75) and Y( atomic weight =16) combine to give a compound having 75.8% X. The formula of the compound is

The mass number of two atoms X and Y is the same (40 each) but their atomic numbers are different (being 20 and 18 respectively). X and Y are examples of :

There are three elements X,Y,Z atomic masses of X and Z are 35.5 and 127. what will be atomic mass of Y on the basis of dobereiner's traids?

A compound is formed by two elements X and Y. Atoms of the element Y (as anions) make ccp and those of the element X (as cations) occupy all the octahedral voids. What is the formula of the compund?

Composition of the nuclei of two atomic species X and Y are given as under : Give the mass numbers of X and Y. What is the relation between the two species ?