Consider the reaction n2 + 3 h2 → 2 nh3 . how much nh3 can be produced from the reaction of 74.2 g of n2 and 14.0 moles of h2? 1. 1.26 × 1025 molecules 2. 1.59 × 1024 molecules 3. 3.19 × 1024 molecules 4. 5.62 × 1024 molecules 5. 1.69 × 1025 molecules

Reaction:   N₂   +   3 H₂   →   2 NH₃  

the mole ratio of  H₂  :   NH₃    is    3  :   2

If the number of moles of H₂ is 14.0 mol
    then the number of moles of NH₃ = (14.0 mol ÷  3) × 2
                                                            =  9.33 mol

Now, the number of molecules = moles  ×  Avogadro's Constant
                                                     =  9.33 mol × (6.02 × 10²³)
                                                     =  5.6187 × 10²⁴  molecules

As such the answer is 5.62 × 10²⁴  molecules [OPTION 4]       
                                                                

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

Neither model is able to show the reactivity of potassium.