Given the mass ratios of iron to oxygen, which of the following samples could be the mineral hematite, Fe2O3?

A. 3.5:1
B. 2.3:1
C. 2:3
D. 3:2

Question

Given the mass ratios of iron to oxygen, which of the following samples could be the mineral hematite, Fe2O3?

 		A.	3.5:1
 		B.	2.3:1
 		C.	2:3
 		D.	3:2

vera_ewing · Answer

@ganeshie8 I'm pretty sure it's A because the ration of iron to oxygen is 7:3 but I'm not sure. Can you please help?

vera_ewing · Answer

@Preetha please help me?

vera_ewing · Answer

@aum

vera_ewing · Answer

@Jhannybean i really need help!! please!

anonymous · Answer

So follow the reaction first to find the ratio
4Fe + 3O2 - 2Fe2O3, therefore the ratio of masses are (4*56):(3*16):[2(56*2)+(3*16)] or 224:48:544 or 4.6:1:11.3