How many molecules of ammonia are produced from the reaction of 9.5×10^23 molecules of nitrogen are reacted with excess hydrogen gas? N2+3H2--->2NH3
A. 1.9×10^24 molecules NH3
B. 2.9×10^24 molecules NH3
C. 2 molecules NH3
D. 9.5×10^23 molecules NH3

A) 1.9×10²⁴ molecules of ammonia

Explanation:

Given data:

Number of molecules of ammonia formed = ?

Number of molecules of nitrogen react= 9.5×10²³

Solution:

Number of moles of nitrogen react:

According to Avogadro number,

1 mole = 6.022×10²³ molecules

9.5×10²³ molecules ×1mol / 6.022×10²³ molecules

1.6 mol

Chemical equation:

N₂ + 3H₂    →     2NH₃

now we will compare the moles of nitrogen and ammonia.

            N₂        :        NH₃

             1          :         2

           1.6         :       2/1×1.6 = 3.2 mol

Number of molecules of ammonia:

1 mole =  6.022×10²³ molecules

3.2 mol × 6.022×10²³ molecules / 1mol

1.9×10²⁴ molecules

the answer is d. 74.02

the answer is c.the valence of the atoms combine .