Question

13. Two oxides of a metal contain 27.6% and 30% of oxygen respectively. If the formula of first
compound is M304, find the formula of second compound.​

Answer 1

Answer:

ercentage of oxygen=27.6 Precentage of metal=100-27.6=72.4 Formula of the metal oxide=M3O4 Let the atomic mass of the metal= x Percentage by weight of the metal in the oide M3O4=3x *100/3x+64=72.4 3x=0.724*3x+0.724*64 0.828x=46.336 x=56 The atomic mass of the metal=56 Element Percentage Atomic Mass Atomic ratio Simplest ratio whole no.ratio M 70 56 70/56=1.25 1.25/1.25=1 2 O 30 16 30/16 1.88/1.25=1.5 3 M2O3... Or... In the case of the 1st oxide, Mass of oxygen = 27.6 Therefore, Mass of metal = 100 - 27.6 = 72.4 In the case of the 2nd oxide, Mass of oxygen = 30 Therefore, Mass of metal = 100 - 30 = 70 Also, Formula of the 1st oxide is M3O4 Therefore, Number of atoms of metal in the 2nd oxide = (3/72.4) x 70 = 2.9 Number of atoms of oxygen in the 2nd oxide = (4/27.6) x 30 = 4.35 Thus, Ratio of metal : oxygen in the 2nd oxide = 2.9 : 4.35 or ≈ 2 : 3 Hence, The Formula of the 2nd oxide is M2O3. Hope I helped u.. Plz mark as the BRAINLIEST answer if helpful..

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