even more chemistry problems

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1) Which molecule listed below has a nonpolar covalent bond? 
a) H2
b) NaCl
c) H2O
d) all of the above


2) Which of the following is most likely to have an ionic bond? 
a) HF

b) BaCl2
c) N2 
d) NH3


3) What is the bond angle in CCl4? 
a) 104
b) 180
 c) 120
d) 109.5

5) Use VSEPR theory to predict the electron pair geometry and the molecular geometry for SO2 molecule.
a) The electron-pair geometry is tetrahedral, the molecular geometry is linear
b) The electron-pair geometry is trigonal planar, the molecular geometry is bent
c) The electron-pair geometry is linear, the molecular geometry is linear
d) The electron-pair geometry is trigonal planar, the molecular geometry is trigonal planar


6) How many moles of ions you can have in 100 mL of 0.6 M silver carbonate solution.
 a) 0.06
b) 0.12
c) 0.18
d) 6.023x1023

7) How many lone pair electrons are on the oxygen atom in H2O?
a) 2
b) 0
 c) 3 
d) 4


8) What is the initial volume (L) of a system initially at 744 mmHg that is compressed to a final volume of 2.60 L and has a final pressure of 1.20 atm.
a) 0.004 L
 b) 2.10 L 
c) 0.169 L 
d) 3.21 L


9) Consider the following reaction:
CH4 (g)+ Cl2 (g)→CCl4 (g)+ HCl(g)
What volume of CCl4 will be formed at STP if 1.20 moles CH4 are allowed to react with 1.60 moles Cl2?
a) 8.96 L
b) 56 L
c) 1.78 x 10-2 L d) 26.88 L


10) Calculate the molarity of a KCl solution made by dissolving 52.5g of KCl in 250 mL water.

1. a)  2.8M
   
2. b)  5.6M
   
3. c)  0.0028 M
   
4. d)  0.28 M
   

11) The titration of 25.0 mL of 0.125 M H2SO4 solution required 27.07 mL of KOH to reach the endpoint. What is the concentration of the KOH?
a) 0.115 M
b) 0.230 M
c) 0.169 M 
d) 0.0848 M


12) You mix 60.0 mL of 1.0 M silver nitrate with 25.0 mL of 0.80 M sodium chloride. What mass of the precipitate should form?
a) 2.9g
b) 5.8g 
c) 8.7g 
d) 9.6g


13) What best describes the type of intermolecular forces would you expect to find in a sample of CBr4?
a) H-bonding
b) dipole-dipole
c) ionic
d) london dispersion

14) Which of the following substances has the biggest dispersion forces? 
a) Kr
b) Cl2
c) Ne
d) O3


15) Which one would you expect to have the higher melting point? 
a) CaO
b) CS2
c) Can not be determined 
d) They are the same


16) Which of the following will have a low vapor pressure? 
a) CH3OCH3
b) CH3OH
c) O2
d) all of them


17) What is the volume of 28.0 g nitrogen gas at STP? 
a) 44.8
b) 11.2
c) 22.4
d) none of the above


How many liters of water can be made from 55 grams of oxygen gas and 35 g of hydrogen gas at a pressure of 12.4 atm and a temperature of 850 C?
a) 4L 
b) 2L 
c) 8L
d) 12L


19) What is the molar mass of a gas if 0.250 g of the gas occupies 215 mL at 618 mmHg and 30.0°C?
a) 3.5 g/mol 
b) 17.5 g/mol 
c) 35.7 g/mol 
d) 71g/mol


20) What type of compound is carbon monoxide? a) polar
b) ionic
c) nonpolar
d) all of the above

22) How many mL of the 0.025 M HCl solution you need to prepare 0.1 L of the 0.0125 M HCl solution?
a) 0.05
b) 0.2
c) 20
d) 50 




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