Order The Oxidation State of Iron Discussion

Order The Oxidation State of Iron Discussion
Order The Oxidation State of Iron Discussion
1. How many grams of hydrogen are in 5 moles of phosphoric acid?
(A) 100 g
(B) 3.0 g
(C) 490 g
(D) 15 g
2. Determine the percent mass of each element in H2SO4.
(A) 29% hydrogen, 14% sulfur, 57% oxygen
(B) 2.0% hydrogen, 33% sulfur, 65% oxygen
(C) 4.0% hydrogen, 32% sulfur, 64% oxygen
(D) 2.0% hydrogen, 48% sulfur, 50% oxygen
3. Copper(II) nitrate decomposes when heated according to the following
equation:
2 Cu(NO3)2 → 2 CuO 4 NO2 O2
How many grams of NO2 form when 2.0 moles of copper(II) nitrate
decompose?
(A) 46 g
(B) 92 g
(C) 180 g
(D) 220 g
4. What is the oxidation state of iron in potassium ferrate, K2FeO4?
(A) 6
(B) 4
(C) 3
(D) 2
CHAPTER 1
2 ❯ McGraw-Hill’s 500 MCAT General Chemistry Questions
5. Which of the following contains an element in a 1 oxidation state?
(A) Cu2S
(B) CuS
(C) Ca(ClO2)2
(D) AlCl3
6. The formula of pyruvic acid is HC3H3O3. What is the mass percent
of oxygen in pyruvic acid?
(A) 30%
(B) 55%
(C) 41%
(D) 60%
7. The following equation illustrates the formation of heme from ferrous ion
and protoporphyrin IX:
C31H28N4O4(aq) Fe² (aq) → FeC31H26N4O4(aq) 2 H (aq)
What type of reaction is the formation of heme?
(A) Lewis acid-base
(B) Oxidation-reduction
(C) Single replacement
(D) Neutralization
8. The formation of window glass involves the fusing of a mixture of sand,
SiO2; calcium carbonate, CaCO3; and sodium carbonate, Na2CO3.
The process generates a gas. What is the identity of the gas?
(A) CO2
(B) O2
(C) Na2O
(D) O3
9. What is the concentration of ammonium ions in a 0.3 M solution
of ammonium phosphate?
(A) 0.6 M
(B) 0.3 M
(C) 0.9 M
(D) 0.0 M
The Basics ❮ 3
10. How many milliliters of 0.40 M NaOH solution are necessary
to neutralize 0.0500 L of 0.20 M HCl solution?
(A) 0.025 mL
(B) 50.0 mL
(C) 75.0 mL
(D) 25.0 mL
11. The mass percent of oxygen in sucrose, C12H22O11, is approximately
(A) 50%
(B) 25%
(C) 10%
(D) 75%
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