NUEVA VIZCAYA STATE UNIVERSITY
COLLEGE OF ENGINEERING, ELECTRICAL ENGINEERING DEPT.
LECTURE NO. 2
CHEMISTRY
ESAS
1. The solubility of the sucrose, a chemical name for sugar, is 490/100g water at 100℃. The solution is
prepared by mixing 175 g sugar in 0.045 kg of water at 100℃. Determine the maximum amount of sugar
that can be dissolve in the water at 100℃.
A. 220.5 g
C. 150.5 g
B. 250.2 g
D. 520.5 g
2. Calculate the mass of a titanium atom. Titanium element has atomic mass of 47.9 amu.
A. 9.75 x 10-23g Ti
C. 5.97 x 10-23g Ti
B. 7.95 x 10-23g Ti
D. 9.57 x 10-23g Ti
3. Determine the number of molecules in 20g of C9H8O4.
A. 6.96 x 1022 molecules C9H8O4
C. 6.69 x 1022 molecules C9H8O4
22
B. 7.69 x 10 molecules C9H8O4
D. 8.96 x 1022 molecules C9H8O4
4. What is the percentage mass of oxygen in Fe2O3?
A. 40%
C. 50%
B. 45%
D. 30%
5. What is the atomic mass of oxygen consists of three isotopes with atomic masses 16 amu, 17 amu, and
18 amu, with abundances 99.76%, 0.04%, 0.02%, respectively?
A. 16 amu
C. 20 amu
B. 18 amu
D. 22 amu
6. How many moles are there in 55 g of CF2Cl2, a chlorofluorocarbon that damages the ozone layer in the
atmosphere?
A. 0.55 mol CF2Cl2
C. 0.65 mol CF2Cl2
B. 0.45 mol CF2Cl2
D. 0.75 mol CF2Cl2
7. A container has 83 ml of nitric acid solution which is labeled 7.2M HNO3. Determine the number of
moles of HNO3 in the container?
A. 0.9 mol HNO3
C. 0.6 mol HNO3
B. 0.8 mol HNO3
D. 0.85 mol HNO3
8. Calculate the mass in grams of sulfur that can be obtained from 25 g of C6H10O2S. C = 12amu, H = 1
amu, and O = 16amu, S = 32 amu.
A. 6.5 mol S
C. 6.55 mol S
B. 9.5 mol S
D. 5.5 mol S
9. Calculate the molar mass of the compound N2H6(NO3)2.
A. 185 amu
C. 158 amu
B. 148 amu
D. 168 amu
10. Arterial blood contains about 0.25 mg of oxygen per milliliter. Determine the pressure exerted by the
oxygen in one liter of arterial blood at normal body temperature of 38℃?
A. 0.5 atm
C. 0.7 atm
B. 0.2 atm
D. 0.9 atm
11. How many nitrogen atoms are there in 200g of NH4N3?
A. 9.03 x 1023 atoms N
C. 9.03 x 1024 atoms N
22
B. 9.03 x 10 atoms N
D. 9.03 x 1025 atoms N
SOURCE: DREAMFORCE REVIEW AND TRAINING CENTER
1
NUEVA VIZCAYA STATE UNIVERSITY
COLLEGE OF ENGINEERING, ELECTRICAL ENGINEERING DEPT.
12. What is the mass in grams of C2H6O2 in 0.769 mol of C2H6O2?
A. 67.7 g C2H6O2
C. 87.7 g C2H6O2
B. 77.7 g C2H6O2
D. 47.7 g C2H6O2
13. Calculate the volume of NH3 solution which has 0.14 M, containing 10g of NH3.
A. 4.2 li
C. 6.4 li
B. 5.4 li
D. 5.2 li
14. Determine the molarity of 2.6L of a 3M solution after it has been diluted to 5.9L.
A. 1.3M
C. 3.3M
B. 2.3M
D. 4.3M
15. Determine the molality of NH3 in aqueous solution if the mole fraction NH3 is 0.343.
A. 39m
C. 29m
B. 40m
D. 35m
16. How many moles of solute required to prepare 4.5m aqueous solution containing 267g of H 2O?
A. 3.2 moles
C. 2.4 moles
B. 4.2 moles
D. 1.2 moles
17. Determine the concentration in molarity of a 320-ml solution which contains 2.5 moles of solute.
A. 8.9M
C. 7.8M
B. 10.8M
D. 6.78M
18. What is the molinity of 550-g solution having 25 moles of solute?
A. 54.45M
C. 55.45M
B. 64.45M
D. 45.45M
19. What is the molar fraction of solvent in an aqueous solution, with 5 moles of alcohol and 10 moles of
water?
A. 0.87
C. 0.97
B. 0.67
D. 0.77
20. What is the mole fraction of NaCl in a solution containing of 0.032 moles of NaCl in 75g of water?
A. 0.00762
C. 0.762
B. 0.0762
D. 0.00672
21. Calculate the volume in liter occupied by 0.92 mol of H2 at STP.
A. 30.6L
C. 15.6L
B. 25.6L
D. 20.6L
22. What is the volume occupied by 0.252 mol of nitrogen gas at 100℃ and 85.6 kPa?
A. 9.1L
C. 10.1L
B. 10.5L
D. 15.1L
23. Determine the molar mass of 5.21g of gas which occupies 3.92 L at 105 kPa and 25℃.
A. 41.36g/mol
C. 45.36g/mol
B. 31.36g/mol
D. 61.33g/mol
24. Calculate the molar mass of a gas with the density of 2.73g/L and pressure of 1.5 atm at 22℃.
A. 34g/mol
C. 44g/mol
B. 54g/mol
D. 24g/mol
SOURCE: DREAMFORCE REVIEW AND TRAINING CENTER
2
NUEVA VIZCAYA STATE UNIVERSITY
COLLEGE OF ENGINEERING, ELECTRICAL ENGINEERING DEPT.
25. How many neutrons in the nucleus of Fluorine element, with atomic mass of 19amu and atomic number
of 9?
A. 10
C. 18
B. 14
D. 22
26. Determine the pH value of a solution with 3.2 x 10-8 hydrogen ion concentration.
A. 9.5
C. 8.5
B. 7.5
D. 10.5
27. What is the hydrogen ion concentration of a solution with pH 5.5?
A. 4.16 x 10-6M
C. 6.14 x 10-6M
-6
B. 3.16 x 10 M
D. 1.46 x 10-6M
28. What is the volume of 5.0 kg of Hg with the density of 13.6 g/mL?
A. 268 ml
C. 368 ml
B. 682 ml
D. 386 ml
29. What is the mass of oxygen that reacts with 7.89g Aluminum to produce 14.78g of Aluminum Oxide?
A. 9.86g
C. 8.89g
B. 10.86g
D. 6.89g
30. If 7.35g of sulfur reacts with 4.92g of aluminum to form the only compound sulfur and aluminum, how
much sulfur will react with 9.12g of aluminum?
A. 13.62g
C. 26.31g
B. 31.62g
D. 16.23g
SOURCE: DREAMFORCE REVIEW AND TRAINING CENTER
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