posted by kp .
3H2(g) + N2(g) 2NH3(g)
If the reaction starts with 0.500 mol of H2, how many atoms of hydrogen in the compound NH3 would you expect to make?
1. You don't have an arrow but I assume it goes between N2 and 2NH3.
2. You have no Kp or Kc listed.
3. You won't make any hydrogen atoms. Perhaps you meant, "How many atoms of hydrogen will be in the NH3 formed."