When the supply of oxygen is limited, iron metal reacts with oxygen to produce a mixture of and . in a certain experiment, 20.00 g iron metal was reacted with 11.19 g oxygen gas. after the experiment, the iron was totally consumed, and 3.47 g oxygen gas remained. calculate the amounts of and formed in this experiment?

Iron is reacting with O2 to form FeO and Fe2O3

Balanced reaction will be

3 Fe + 2 O2 > FeO + Fe2O3

Moles of Fe reacted = Mass / Atomic mass = 20 / 56 = 0.357

Moles of O2 reacted = mass / molar mass = 11.19-3.47 / 32 = 0.241 moles

The 0.357 moles of Fe will react with 0.24 moles of O2 to give

i) 0.357/ 3  moles of FeO = 0.119 moles of FeO

MAss of FeO = moles X molar mass = 0.119 X 71.84 = 8.55 grams

ii) 0.357/ 3  moles of Fe2O3 = 0.119 moles of Fe2O3

MAss of Fe2O3 = moles X molar mass = 0.119 X 160 = 19.04 grams

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).