Question

Consider calcium nitrate, Ca(NO3)2. Choose the best explanation for the subscript, 2, from the list provided There are two atoms of oxygen. There are two atoms of nitrogen. There are two nitrogen atoms and five oxygen atoms. There are two nitrate ions.

Answer 1

D is correct There are two nitrate ions.

Fill in the blank with the molar mass of calcium nitrate. A link to the periodic table is provided for you.

⇒ 164.10 g/mol

Answer 2

Answer : The correct option is, There are two nitrate ions.

Explanation :

Calcium nitrate is formed by the combination of a metal cation and poly-atomic anion. On the dissociation, it will dissociates into one calcium ion and two nitrate ions.

`Ca(NO_3)_2\rightarrow Ca^(2+)+2NO^-_3`

Hence, the subscript, 2 indicates that there are two nitrate ions in calcium nitrate.