Enter the chemical equation for the formation of ca(no3)2(s) from its respective elements in their standard states.

express your answer as a chemical equation.

identify all of the phases in your answer.

Ca(s)  +  N₂(g)  +  3O₂(g) →  Ca(NO₃)₂ (s)

Explanation:

The reaction of the formation of Ca(NO₃)₂(s) , is as follows -

Ca  +  N₂  +  O₂ →  Ca(NO₃)₂

The above reaction , can be balanced by adding whole numbers ,

Hence , the balanced reaction is as follows -

Ca  +  N₂  +  3O₂ →  Ca(NO₃)₂

The states of the respective molecules is -

the state at which the atoms are most stable or the state at which the atoms are most commonly found .

Hence ,

Calcium is most stable in solid state

Oxygen  is most stable in gaseous state

Nitrogen  is most stable in gaseous state

hence , the balanced reaction with all the states mentioned is as follows -

Ca(s)  +  N₂(g)  +  3O₂(g) →  Ca(NO₃)₂ (s) .

the answer would be c

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.