Gas Laws
P1V1=P2V2
Boyle's Law
A balloon has a volume of 2.12L at an initial temperature of 12oC. What is the balloon’s volume at 61oC in milliliters?
3.0 x 103 mL
What is the molecular geometry of CH4?
tetrahedral
Where on the periodic table can you find the element with the highest electronegativity?
Top right
Identify the answer using the correct number of sig figs in
(.792 x 1.459) + (8.3/2.14)
5.0
Ideal Gas Law
PV=nRT
A gas occupies 2.46L at 1.390 atm. At what pressure will the volume be 2.99L?
1.14 atm
What is the molecular geometry of SO2?
bent
Noble gas configuration for Cr-2
[Ar] 4s2 3d6
If the heat change of a reaction is 234 J is it endothermic or exothermic
Endothermic
Charles' Law
V1/T1=V2/T2
You have 14.1g of O2 in a 5.35L container at a pressure of 2.95atm. What is the temperature in oC?
r=0.082
165oC
What is the molecular and electron geometry of PH3?
Electron - tetrahedral
Molecular - trigonal pyramidal
Calculate the wavelength of light that must be absorbed by a hydrogen atom to promote an electron from the n = 3 to the n = 5 energy level.
RH= 2.179x10-18
1.29 x 10-6 m
How many mL would be needed to make a 1.4M solution out of 3.0L of a .350M solution?
750 mL
Combined Gas Law
(P1V1)/T1=(P2V2)/T2
A 27L container has a pressure of 119 atm at a temperature of 22oC. If the pressure is decreased to 1.30 atm and the temperature is 32oC, what is the final volume? How many 6.0L balloons can be filled?
v = 2600L
425 balloons
What is the molecular and electron geometry of XeF4?
Electron - octahedral
Molecular - square planar
Find ΔH
2 H2S (g) + 3 O2 (g) → 2 H2O (g) + 2 SO2 (g)
ΔHf°[SO2(g)] = -292.1 kJ/mol,
ΔHf°[H2S(g)] = -26.15 kJ/mol,
ΔHf°[H2O(l)] = -275.8 kJ/mol,
ΔHf°[H2O(g)] = -221.8 kJ/mol,
ΔHf°[O3(aq)] = -32.09 kJ/mol.
-974.5 kJ
Finish the reaction and find the net ionic equation
AgNO3 (aq) + K2S (aq) -->
2 Ag+ (aq) + S-2 (aq) --> Ag2S (s)