Question

1. name each of the following molecules using the appropriate prefixes.

a) $\ce{n2o5}$
b) $\ce{cf4}$
c) $\ce{scl3}$
d) $\ce{so}$

Explanation:

Step1: Name \( \ce{N2O5} \)

For molecular compounds, we use prefixes to indicate the number of atoms. The prefix for 2 is "di-" and for 5 is "penta-". The first element is nitrogen (\( \ce{N} \)) and the second is oxygen (\( \ce{O} \)), with the ending changed to -ide. So \( \ce{N2O5} \) is dinitrogen pentoxide.

Step2: Name \( \ce{CF4} \)

The first element is carbon (\( \ce{C} \)) (no prefix needed for 1 atom), and the second is fluorine (\( \ce{F} \)). The prefix for 4 is "tetra-", and we change fluorine to fluoride. So \( \ce{CF4} \) is carbon tetrafluoride.

Step3: Name \( \ce{SCl3} \)

The first element is sulfur (\( \ce{S} \)) (no prefix for 1), the second is chlorine (\( \ce{Cl} \)). The prefix for 3 is "tri-", and chlorine becomes chloride. So \( \ce{SCl3} \) is sulfur trichloride.

Step4: Name \( \ce{SO} \)

The first element is sulfur (\( \ce{S} \)) (no prefix), the second is oxygen (\( \ce{O} \)). The prefix for 1 (for oxygen) is "mono-", and oxygen becomes oxide. So \( \ce{SO} \) is sulfur monoxide.

Answer:

a) Dinitrogen pentoxide
b) Carbon tetrafluoride
c) Sulfur trichloride
d) Sulfur monoxide