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For the questions 1-3, consider the following reaction. (ALL QUESTIONS ARE WORTH 5 POINTS) Mg3N2+ 6H2O 3Mg(OH)2+ 2NH3 1)When 165.0 gMg3N2 reacts with...

For the questions 1-3, consider the following reaction. (ALL QUESTIONS ARE WORTH 5 POINTS)
Mg3N2+ 6H2O 3Mg(OH)2+ 2NH3
1)When 165.0 gMg3N2 reacts with 170.0 gH2O, what is the limiting reactant for the formation of
NH3?
A)Mg(OH)2
B)Mg3N2
C)H2O
D)NH3
E)None of the above

2)When 165.0 gMg3N2 reacts with 175.0 gH2O, what is the maximum theoretical yield of
NH3?
A)25.00 g B)55.70 g C)20.20 g D)53.52 g E)55.10 g

3)When 165.0 gMg3N2 reacts with 175.0 gH2O, 20.0 g of NH3 is formed. What is the % yield?

4)How many hydrogen atoms are in 0.5 mol of water?
A)1
B)3.01 X 1023
C)18.016
D)6.02 X 1023
E)1.20 X 1024

5)Calculate the empirical formula of a compound that has a composition of 60% carbon, 8%
hydrogen, and 32% oxygen.
A)C60H8O32
B)C5H8O2
C)CHO
D)C10H16O4
E)C15H4O16

6)What is the correct description for the following reaction?
Fe2(SO4)3 (aq)+ 6 KOH (aq) 2Fe(OH)3(s)+ 3K2SO4 (aq)
A)Iron (II) sulfate reacts with potassium hydroxide to form iron (II) hydroxide and potassium
sulfate
B)Iron (III) sulfate reacts with potassium hydroxide to form iron (III) hydroxide and potassium
sulfate
C)Iron sulfate reacts with potassium hydroxide to form iron hydroxide and potassium sulfate
D)Iron (III) sulfite reacts with potassium hydroxide to form iron (III) hydroxide and potassium
sulfite
E)Iron (III) sulfite reacts with potassium hydroxide to form iron (III) hydroxide and potassium
sulfite

7)The empirical formula of a compound is N2O, and its molar mass is about 88.g. What is its
molecular formula?
A)N6O3 B)N10O5 C)N4O2 D)N8O4 E)N2O

8) 3.27 mol H2O is how many grams of water?
A)21.3 grams
B)58.9 grams
C)18.016 grams
D)3.27 grams
E)5.51 grams

9)Sulfur has __________ valence electrons.
A)4 B)8 C)2 D)10 E)6

10)What is the empirical formula of C9H15O6?
A)C3H5O2 B)C2H4O C)C2HO2 D)CHO E)CH2O2

11)What is the mass of 2.0 X 1026water molecules? 11)
A)6000 grams
B)330 grams
C)6.02×1023 grams
D)3.0 X 10-2 grams
E)18.016 grams

12)How many electrons does the calcium cation have?
A)22 B)18 C)2 D)20 E)36

13)How many neutrons does184W have?
A)6 B)184 C)110 D)74 E)183.84

14)Give the correct name for Au(HCO3)2.
A)gold (II) bicarbonate
B)gold (III) bicarbonate
C)gold dihydrogen carbonate
D)gold bicarbonate
E)gold Hydrogen carbonate (or bicarbonate)

15)How many moles of CaCl2 are present in 40.0 g of the compound?
A)3.60 mol
B)7.04× 10-2 mol
C)0.360 mol
D)2.77× 10-2 mol
E)2.77 mol

16)What mass percent of chloride is in CaCl2?
A)55.0% B)36.1 % C)64.0% D)88.1% E)74.9%

17)The correct name for the compound CP3 is __________.
A)carbon monophosphide
B)carbon phosophide
C)phosphorus carbide
D)carbon triphosphide
E)monocarbon phosphide

18)What is the correct name of Na2SO4?
A)sodium sulfide
B)sodium sulfate
C)sodium(II) sulfide
D)sodium(II) sulfate
E)sodium(I) sulfate

19)The correct name for NiSO4 is __________.
A)nickel (III) sulfate
B)nickel (II) sulfate
C)nickel sulfide
D)nickel sulfate
E)nickel sulfite

20)The atomic number of chlorine is __________.
A)37 B)7 C)17 D)35 E)35.4527

21)How many electrons does phosphide have?
A)10 B)18 C)4 D)15 E)3

22)Gold(II) bromide has the following correct formula.
A)AuBr3 B)Au3Br C)AuBr D)AuBr2 E)Au2BrA)99.0 % B)36.3 % C)35.9 % D)37.4% E)80.0 %

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