The decomposition of hi(g) is represented by the equation
2hi(g) = h2(g) + i2(g)
the following experiment was devised to determine the equilibrium constant of the reaction.
hi (g) is introduced into five identical 400-cm3 glass bulbs, and the five bulbs are maintained at 623 k. the amount of i2 produced over time is measured by opening each bulb and titrating the contents with 0.0150 m na2s2o3 (aq). the reaction of i2 with the titrant is
i2 + 2na2s2o3 = na2s4o6 + 2nai
data for the experiment are provided in this table.
bulb initial mass of hi (g) time(hours) volume of titrant(ml)
1 0.300 2 20.96
2 0.320 4 27.90
3 0.315 12 32.31
4 0.406 20 41.50
5 0.280 40 28.68
what is the value of kc for the decomposition of hi at 623 k?

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

Answer:   d.  carbon dioxide.

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  c.sending the first human into space4. which of these space missions involved the deployment of lunar roversa. voyager 15. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar  systemb.safir7.which technology limit the future of space explorationb. scientist must first develop certain technologies before missions can be completed.