Question

what is the name for the following molecule?

n3o4=

question 4

what is the name for the following molecule?

so2=

question 5

what is the name for the following molecule?

p2cl5=

Explanation:

When naming covalent compounds (molecules), we use prefixes to indicate the number of each type of atom. The prefixes are: 1 - mono (not used for the first element usually), 2 - di, 3 - tri, 4 - tetra, 5 - penta, etc.

• For \(N_3O_4\): The first element is nitrogen (\(N\)), there are 3 nitrogen atoms, so the prefix is "tri". The second element is oxygen (\(O\)), there are 4 oxygen atoms, so the prefix is "tetra", and we change the ending of oxygen to " - ide". So it is named trinitrogen tetroxide.
• For \(SO_2\): The first element is sulfur (\(S\), no prefix as it's the first element). The second element is oxygen (\(O\)), there are 2 oxygen atoms, so the prefix is "di", and change the ending of oxygen to " - ide". So it is named sulfur dioxide.
• For \(P_2Cl_5\): The first element is phosphorus (\(P\)), there are 2 phosphorus atoms, so the prefix is "di". The second element is chlorine (\(Cl\)), there are 5 chlorine atoms, so the prefix is "penta", and change the ending of chlorine to " - ide". So it is named diphosphorus pentachloride.

Answer:

\(N_3O_4\): trinitrogen tetroxide
\(SO_2\): sulfur dioxide
\(P_2Cl_5\): diphosphorus pentachloride