4.90 Iron metal can be refined (rom the mineral hematite (Fe 2 O 3 ). One way of converting the mineral to iron is to react it with carbon monoxide, as shown below: Fe 2 O 3 + 3 CO → 2 Fe + 3 CO 2 Because the hematite is obtained from various ores, it is usually not in a pure form. Suppose an iron manufacturer has 2.00 X 10 5 kg of ore available, and the ore is 93% Fe 2 O 3 by mass. (There is no iron in the remaining 7% of the ore.) How many moles of Fe 2 O 3 are present in this ore? How many kg of pure iron could be obtained from this sample of ore? Assume that the process has a 100% yield and that excess CO is available.
4.90 Iron metal can be refined (rom the mineral hematite (Fe 2 O 3 ). One way of converting the mineral to iron is to react it with carbon monoxide, as shown below: Fe 2 O 3 + 3 CO → 2 Fe + 3 CO 2 Because the hematite is obtained from various ores, it is usually not in a pure form. Suppose an iron manufacturer has 2.00 X 10 5 kg of ore available, and the ore is 93% Fe 2 O 3 by mass. (There is no iron in the remaining 7% of the ore.) How many moles of Fe 2 O 3 are present in this ore? How many kg of pure iron could be obtained from this sample of ore? Assume that the process has a 100% yield and that excess CO is available.
Solution Summary: The author explains how to calculate moles of hematite, mass of pure iron in kg.
4.90 Iron metal can be refined (rom the mineral hematite (Fe2O3). One way of converting the mineral to iron is to react it with carbon monoxide, as shown below:
Fe
2
O
3
+
3 CO
→
2 Fe
+
3 CO
2
Because the hematite is obtained from various ores, it is usually not in a pure form. Suppose an iron manufacturer has 2.00 X 105 kg of ore available, and the ore is 93% Fe2O3 by mass. (There is no iron in the remaining 7% of the ore.) How many moles of Fe2O3are present in this ore? How many kg of pure iron could be obtained from this sample of ore? Assume that the process has a 100% yield and that excess CO is available.
From this COZY spectrum, how do you know which protons are next to each other?
5. A buffer consists of 0.45 M NH, and 0.25 M NH-CI (PK of NH 474) Calculate the pH of the butter. Ans: 9.52
BAS
PH-9.26 +10g (10.95))
14-4.59
PH=4.52
6. To 500 ml of the buffer on #5 a 0.20 g of sample of NaOH was added
a Write the net ionic equation for the reaction which occurs
b. Should the pH of the solution increase or decrease sightly?
Calculate the pH of the buffer after the addition Ans: 9.54
Explain the inductive effect (+I and -I) in benzene derivatives.
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