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Q: What is an irregular figure with 7 sides and a perimeter of 78m?
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Perimeter and area of a rectangle with a length of 24 m and width of 15 m?

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What town in Victoria is 37 Deg 52 697' South 145 deg 15.627' East Elevation 78M?

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A certain metal M forms two oxides M3O and M2O. If the percent by mass of M in M3O is 78.0 what is the percent by mass of M in M2O?

There is a confusing part in this question: Do you mean M2O and M3O or MO2 and MO3? I presume you mean the latter (I.e. M Dioxide and M Trioxide). Because I can't think of any chemicals that form 3M to 1O.A little algebra will help you.Let M be the mass of the metal.Let O be the mass of Oxygen.therefore:m+3O=total masssince M is 78% of the total mass,M/(M+3O)=0.78Since the otomic mass of Oxygen is 16,M/(M+3*16)=0.78multiplying out the denominator,M=0.78M+37.44deducting .78M,0.22M=37.44So therefore,M=37.44/0.22M=170.181818In terms of the uncertainty, this would make sense, as Thulium, with a mass of 169 forms a 4+ and 6+ oxidation state. Therefore in the Dioxide M2Ototal mass=170.181818+2*16=202.181818then mass of M in this is equal to:170.181818/202.181818Which is equal to 0.84173 or 84%.If it is M2O and M3O the same procedure can be used, but tou will have to re-work it.


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About 8 million. Country Pop. Killed/Mising Wounded Total(Military) Civilian (deaths) Germany 78m 3.5 million 4.6 million 8.1 million 2million Italy 44m 330,000 ? 70,000 Japan 72m 1.75 million ? 350,000 Rumania 20m 500,000 300,000 800,000 400,000 Bulgaria 6m 10,000 ? 50,000 Hungary 10m 120,000 250,000 370,000 200,000 Finland 4m 100,000 45,000 145,000 4,000 Country Pop. Killed/Mising Wounded Total(Military) Civilian (deaths) Source: world war 1 casualties (Google) Copernic


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