1. Putrescine [NH2(CH2)4NH2] found in rotting animal tissue, is known to be in all
cells and essential for normal and abnormal (cancerous) growth. A 0.100 M
aqueous solution of putrescine has 2.00% dissociation. Determine K a
2. A balloon filled with 1.92g of helium has a volume of 12.5 L. What is the
balloon’s volume after 0.850 g of helium has leaked out through a small hole
(assume constant and standard pressure and temperature)?
3. What is the density (in g/L) of Xe gas at STP? (MW of Xe = 131.29 g/mol)
4. HCL and NH3 are release at same time from opposite ends of 200.0 cm
horizontal tube. At what distance do the gases meet?
5. A 2.10 L vessel contains 4.65 g of a gas at 1.00 atm and 27.0 C. What is the
molar mass of the gas?
6. Th OH- ion concentration of a blood sample is 2.5 x 10 -7 what is the pH of the
blood?
7. In the 0.122 M solution of monoprotic acid whose K a is 5.7 x 10-4 what is the
a) [H3O+] b) pH c) % ionization
8. What are the [H3O+] and the pH of a buffer that consists of 0.33 M CH 3COOH
and 0.28 M C6H5COONa? (Ka = 6.3 x 10-5)
9. A sample of carbon monoxide occupies 3.65 L at 298 K and and 745 torr. Find
its volume at -14 C and 367 torr
10.Determine the relative rate of diffusion for krypton gas and bromine gas
11.A molecule of O2 has a speed of 12.3 m/s at a given temperature and
pressure. What is the speed of hydrogen gas under the same conditions?
12.Aluminum reacts with excess hydrochloric acid to form aqueous s aluminum
chloride and 35.8 mL of hydrogen gas above the solution at 27 C and 751
mmHg. How many grams of aluminum reacted?
a) Write the complete and balanced chemical equation for the reaction
b) Solve for the moles of hydrogen gas
c) Solve for the mass of aluminum (use stoichiometry)
cells and essential for normal and abnormal (cancerous) growth. A 0.100 M
aqueous solution of putrescine has 2.00% dissociation. Determine K a
2. A balloon filled with 1.92g of helium has a volume of 12.5 L. What is the
balloon’s volume after 0.850 g of helium has leaked out through a small hole
(assume constant and standard pressure and temperature)?
3. What is the density (in g/L) of Xe gas at STP? (MW of Xe = 131.29 g/mol)
4. HCL and NH3 are release at same time from opposite ends of 200.0 cm
horizontal tube. At what distance do the gases meet?
5. A 2.10 L vessel contains 4.65 g of a gas at 1.00 atm and 27.0 C. What is the
molar mass of the gas?
6. Th OH- ion concentration of a blood sample is 2.5 x 10 -7 what is the pH of the
blood?
7. In the 0.122 M solution of monoprotic acid whose K a is 5.7 x 10-4 what is the
a) [H3O+] b) pH c) % ionization
8. What are the [H3O+] and the pH of a buffer that consists of 0.33 M CH 3COOH
and 0.28 M C6H5COONa? (Ka = 6.3 x 10-5)
9. A sample of carbon monoxide occupies 3.65 L at 298 K and and 745 torr. Find
its volume at -14 C and 367 torr
10.Determine the relative rate of diffusion for krypton gas and bromine gas
11.A molecule of O2 has a speed of 12.3 m/s at a given temperature and
pressure. What is the speed of hydrogen gas under the same conditions?
12.Aluminum reacts with excess hydrochloric acid to form aqueous s aluminum
chloride and 35.8 mL of hydrogen gas above the solution at 27 C and 751
mmHg. How many grams of aluminum reacted?
a) Write the complete and balanced chemical equation for the reaction
b) Solve for the moles of hydrogen gas
c) Solve for the mass of aluminum (use stoichiometry)
