Which is a covalent compound na2o, ticl2, cas, no2

Answer : The covalent compound is

Explanation :

Covalent compound : These are the compounds in which atoms are covalently bonded.

Covalent bonds are formed by the equal sharing of electrons. These bonds are commonly formed between two non-metals.

Ionic compound : These are the compounds in which atoms are bonded through ionic bond.

Ionic bonds are formed by the complete transfer of electrons. The atom which  looses the electron is considered as electropositive atom and the atom which gains the electron is known as elkectronegative atom.

These bonds are formed between one metal and one non-metal.

From the given compounds, only has 2 non-metals which are nitrogen and oxygen.

Hence, the covalent compound is

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante