If 18*10`23 molecules of H2 react with nitrogen, how many moles of NH3 are produced

0.2moles

Explanation:

Given parameters:

 Number of molecules of H₂ = 1.8 x 10²³molecules

Unknown:

Number of moles of NH₃ = ?

Solution:

 The reaction equation is given as:

                 N₂  + 3H₂   →   2NH₃

   Let us solve from the known to the unknown specie;

 Since the number of molecules is 1.8 x 10²³molecules of H₂;

      6.02 x 10²³molecules will give 1 mole of a substance

      1.8 x 10²³molecules will produce   mole of H₂

                                                               = 0.3moles of H₂

From the balanced chemical equation;

                 3 moles of H₂ produced 2 moles of NH₃

                 0.3 moles of H₂ will yield   = 0.2moles

2b2t

explanation:

2b2t

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.