How many atoms of hydrogen (h) are present in 200 molecules of ammonia (nh3)? express your answer numerically?

Amixture of gaseous sulfur dioxide and oxygen are added to a reaction vessel and heated to 1000 k where they react to form so3(g). if the vessel contains 0.669 atm so2(g), 0.395 atm o2(g), and 0.0851 atm so3(g) after the system has reached equilibrium, what is the equilibrium constant kp for the reaction: 2 so2(g) o2(g) ⇌ 2 so3(g)

What is the chemical formula of the following compound

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?