CHEM 219 MODULES 1–8 EXAMS &
FINAL EXAM – PRINCIPLES OF
ORGANIC CHEMISTRY (2026/2027)
| PORTAGE LEARNING – VERIFIED
Q&A
1. If the reaction between nitrogen and oxygen produces dinitrogen
pentoxide with a yield of 80%, what would be the actual mass of dinitrogen
pentoxide formed from the initial mixture of 25.0 g of nitrogen and 47.0 g
of oxygen?
77.1 g
86.3 g
96.4 g
79.7 g
2. Valence bond theory predicts that carbon will use ___ hybrid orbitals in the
carbonate anion, CO₃²⁻
sp
sp²
spr
sprd
sprd²
,3. If 50.0 mL of a 1.50 M NaCl solution is diluted by adding 100.0 mL of water,
what will be the final molarity of the NaCl solution?
0.50 M
0.75 M
1.00 M
1.50 M
4. What is the molar mass of dinitrogen pentoxide (N2O5)?
, 108.01 g/mol
32.00 g/mol
28.01 g/mol
46.00 g/mol
5. What is the molecular geometry of the PH2– anion that leads to its bond
angle being less than 109.5 degrees?
Linear
Trigonal planar
Tetrahedral
Bent
6. What is the oxidation state of titanium in the compound Ti3(PO3)2?
+1
+2
+3
+4
7. Explain how to calculate the mass of a cube given its side length and
density. What formula would you use?
Mass = Volume × Density
Mass = Density / Volume
Mass = Density × Area
Mass = Volume / Density
FINAL EXAM – PRINCIPLES OF
ORGANIC CHEMISTRY (2026/2027)
| PORTAGE LEARNING – VERIFIED
Q&A
1. If the reaction between nitrogen and oxygen produces dinitrogen
pentoxide with a yield of 80%, what would be the actual mass of dinitrogen
pentoxide formed from the initial mixture of 25.0 g of nitrogen and 47.0 g
of oxygen?
77.1 g
86.3 g
96.4 g
79.7 g
2. Valence bond theory predicts that carbon will use ___ hybrid orbitals in the
carbonate anion, CO₃²⁻
sp
sp²
spr
sprd
sprd²
,3. If 50.0 mL of a 1.50 M NaCl solution is diluted by adding 100.0 mL of water,
what will be the final molarity of the NaCl solution?
0.50 M
0.75 M
1.00 M
1.50 M
4. What is the molar mass of dinitrogen pentoxide (N2O5)?
, 108.01 g/mol
32.00 g/mol
28.01 g/mol
46.00 g/mol
5. What is the molecular geometry of the PH2– anion that leads to its bond
angle being less than 109.5 degrees?
Linear
Trigonal planar
Tetrahedral
Bent
6. What is the oxidation state of titanium in the compound Ti3(PO3)2?
+1
+2
+3
+4
7. Explain how to calculate the mass of a cube given its side length and
density. What formula would you use?
Mass = Volume × Density
Mass = Density / Volume
Mass = Density × Area
Mass = Volume / Density
