1.

The simplest formula of a compound containing 50% of an element X (atomic weight 10) and 50% of element Y (atomic weight 20) is:

A. \[XY\]               
B. \[{{X}_{2}}Y\]
C. \[{{X}_{{}}}{{Y}_{2}}\]                     
D. \[{{X}_{2}}{{Y}_{3}}\]
Answer» C. \[{{X}_{{}}}{{Y}_{2}}\]                     


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