Final answer:
The formulas for the given molecules are:
a) Water: H₂O
b) Hexaboron Monosilicide: B₆Si
c) Dinitrogen Trioxide: N₂O₃
d) Arsenic Pentabromide: AsBr₅
Step-by-step explanation:
a) The formula for water is H₂O. In water, two hydrogen atoms are bonded to one oxygen atom. The small number (2) in front of the symbol H represents the number of hydrogen atoms, and the symbol O represents the oxygen atom.
b) The formula for hexaboron monosilicide is B₆Si. This compound consists of six boron atoms bonded to one silicon atom.
c) The formula for dinitrogen trioxide is N₂O₃. This compound consists of two nitrogen atoms bonded to three oxygen atoms.
d) The formula for arsenic pentabromide is AsBr₅. This compound consists of one arsenic atom bonded to five bromine atoms.