55 Ammonia is not the only possible fertilizer. Others include urea, which can be produced by the reaction: C O 2 ( g ) + 2 N H 3 ( g ) → C O ( N H 2 ) 2 ( s ) + H 2 O ( g ) A scientist has 75 g of dry ice to provide the carbon dioxide. If 4.50 L of ammonia at 15 ∘ C and a pressure of 1.4 atm is added, which reactant is limiting? What mass of urea will form?
55 Ammonia is not the only possible fertilizer. Others include urea, which can be produced by the reaction: C O 2 ( g ) + 2 N H 3 ( g ) → C O ( N H 2 ) 2 ( s ) + H 2 O ( g ) A scientist has 75 g of dry ice to provide the carbon dioxide. If 4.50 L of ammonia at 15 ∘ C and a pressure of 1.4 atm is added, which reactant is limiting? What mass of urea will form?
55 Ammonia is not the only possible fertilizer. Others include urea, which can be produced by the reaction:
C
O
2
(
g
)
+
2
N
H
3
(
g
)
→
C
O
(
N
H
2
)
2
(
s
)
+
H
2
O
(
g
)
A scientist has 75 g of dry ice to provide the carbon dioxide. If 4.50 L of ammonia at
15
∘
C and a pressure of 1.4 atm is added, which reactant is limiting? What mass of urea will form?
Part II. Given two isomers: 2-methylpentane (A) and 2,2-dimethyl butane (B) answer the following:
(a) match structures of isomers given their mass spectra below (spectra A and spectra B)
(b) Draw the fragments given the following prominent peaks from
each spectrum:
Spectra A m/2 =43 and 1/2-57
spectra B m/2 = 43
(c) why is 1/2=57 peak in spectrum A more intense compared
to the same peak in spectrum B.
Relative abundance
Relative abundance
100
A
50
29
29
0
10
-0
-0
100
B
50
720
30
41
43
57
71
4-0
40
50
60 70
m/z
43
57
8-0
m/z = 86
M
90 100
71
m/z = 86
M
-O
0
10 20 30
40 50
60
70
80
-88
m/z
90
100
Part IV. C6H5 CH2CH2OH is an aromatic compound which was subjected to Electron Ionization - mass
spectrometry (El-MS) analysis. Prominent m/2 values: m/2 = 104 and m/2 = 9) was obtained.
Draw the structures of these fragments.
For each reaction shown below follow the curved arrows to complete each equationby showing the structure of the products. Identify the acid, the base, the conjugated acid andconjugated base. Consutl the pKa table and choose the direciton theequilibrium goes. However show the curved arrows. Please explain if possible.
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