A 0. 500 g sample of an impure iron ore is converted entirely into fe2+, which is then titrated with kmno4 (source of mno4- ions) in the following reaction: 5fe2+ + mno4- + 8h+ → 5fe3+ + mn2+ + 4h2o it requires 32. 0 ml of 0. 0200 m kmno4 to react completely with all the fe2+ in the solution. What is the percent by mass of iron in the ore?.

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Snakes, dogs, and humans have a vertebral column. snakes and dogs have tails, and humans have vestigial tailbones. dogs and humans have limbs, but snakes do not. most reptiles lay eggs, but a few give birth to live young. what do these structures suggest about the evolutionary pattern between the three organisms? 1. snakes and dogs are more closely related than snakes and humans. 2. snakes and humans are more closely related than humans and dogs. 3. dogs and humans are more closely related than snakes and humans. 4. dogs, snakes, and humans share a common ancestor. 5. the early ancestor of snakes and dogs is the same, and the early ancestor of humans is different.

What is another way name for bd? cf, bd, cf, be