Question

fill in the systematic names of the following chemical compounds. note: for compounds containing hydrogen, you may give the common name instead. molecular formula name of compound pcl₃ cl₂o₇ cl₂o₃ pcl₅ nh₃

Explanation:

For binary covalent compounds, we use prefixes to indicate the number of atoms of each element. The first element is named as the element itself, and the second element has an -ide ending. For $NH_3$, it has a common name.

1. For $PCl_3$, there is 1 phosphorus and 3 chlorine atoms. So it is phosphorus trichloride.
2. For $Cl_2O_7$, there are 2 chlorine and 7 oxygen atoms. So it is dichlorine heptoxide.
3. For $Cl_2O_3$, there are 2 chlorine and 3 oxygen atoms. So it is dichlorine trioxide.
4. For $PCl_5$, there is 1 phosphorus and 5 chlorine atoms. So it is phosphorus pentachloride.
5. $NH_3$ has the common name ammonia.

Answer:

1. Phosphorus trichloride
2. Dichlorine heptoxide
3. Dichlorine trioxide
4. Phosphorus pentachloride
5. Ammonia