6. Silane gas, SiH
, has a higher boiling point than methane gas, CH
A. Dispersion forces are stronger in silane.
B. Dipole-dipole forces are stronger in silane.
C. Ionic bonds are stronger in silane.
D. Hydrogen bonds are stronger in silane.
E. Silane has a larger molar mass.
7. When acetylene, C
(g) is burned, the products are carbon dioxide and water vapor.
In the balanced equation
for this reaction, what are the coefficients of acetylene, dioxygen O
, carbon dioxide, and water, respectively.
8. Consider the following balanced reaction equation:
(s) + NaNO
O(s) + 8N
If 3.0 moles of NaN
and 3.0 moles of NaNO
react, how many moles of N
A. 1.9 mol
B. 2.7 mol
C. 0.38 mol
D. 24 mol
E. 4.8 mol
9. As more water is added to an aqueous solution of a strong acid with pH = 3 at 25
C, the pH
A. increases until a constant value of 7 is reached.
B. decreases until a constant value of 0 is reached.
C. doesn’t change.
D. increases indefinitely.
E. increases until a constant value of 14 is reached.
10. Which of the following is one product produced by reacting KOH and HBr?
11. Two containers of gases labeled A and B with the same volume and pressure at room temperature are connected
by a tube with a closed valve.
Container B is heated to 100
C while container A remains at room temperature.
The valve is opened to connect the two chambers and then closed.
After both chambers again reach room
temperature with the valve remaining closed, which one of the following statements is correct?
A. B will have more molecules than A.