GASES
Using gas laws, by how much will the pressure in a rigid container increase or decrease if the temperature is doubled?
The compound most likely to be ionic: KF CCl4 CO2 ICl CS2
What is KF? Bonds formed from elements with greater differences in electronegativity are most likely ionic in nature.
This is the driving force for a spontaneous process which readily occurs without intervention. Which measures molecular randomness or disorder.
What is entropy?
This type of molecule gives up a proton easily and yields a weak conjugate base when reacting with water
What is a strong acid
The property of elements that explains why the atomic mass for iron given in the Periodic Table is 55.845 rather than 55, 56, or 57
What are Isotopes?
Which elemental gas behaves most like an ideal gas?
Helium
In which this bond does the oxygen atom posses a partial positive charge: O-H, O-F, N-O, O-C, or P-O?
O-F. Since fluorine is the most electronegative element in the Periodic Table, the oxygen atom, when covalently bonded to the fluorine atom, will have a partial positive charge.
What is from surroundings to the system?
The pH of a solution where [OH-] is 1.0x10-5M
What is pH = 9.0?
1s22s22p6 is the electron configuration for which group 2 ion?
What is magnesium?
Rank the gases in order of least to greatest average molecular speed: H2, He, N2, O2, H2O (at same temperature)
O2, N2, H2O, He, H2
CH3CH2OH and CH3OCH3 have the same formulas but different boiling points. Based on their structure and IMFs, which one will have higher boiling point and why?
CH3CH2OH, because it can form hydrogen bonds due to its hydroxyl group.
This is the equation for the specific heat of a substance
What is C = q/(m*dT)?
What is the equation for calculating pH when only given [OH-]?
What is pH = 14 + log([OH-])
The concentration of IONS in 1.2 M aluminum nitrate solution.
What is 4.8M? Al(NO3)3 contains four ions per formula unit each mole of Al(NO3)3 contributes four moles of ions 1.2mol/L*4=4.8 mol of ions/L
7.0 mol CO2, 7.0 mol Ar, 7.0 mol N2, and 4.0 mol Ne are trapped in a rigid container with a total pressure of 10.0 atm. What is the partial pressure exerted by neon?
1.6 atm
The molecule geometry of PH3 according to the VSEPR theory.
What is Trigonal Pyramidal?
This is the energy absorbed when 10g of liquid water goes from 289K to 299K
What is 418 J
HA is a weak acid which is 4.0% dissociated at .100M. This is the Ka for this acid.
What is 0.00017 (will also accept .00016)
This is the equilibrium expression for the acid HA
What is Ka = ([H3O+][A-])/([HA])?
A 5.0 L vessel contains 2.0 moles of helium and 3.0 moles of hydrogen at a pressure of 10 atm. Maintaining a constant temperature, an additional 3.0 moles of hydrogen are added. What is the new partial pressure of hydrogen in the vessel?
12.0 atm. The initial partial pressure of the hydrogen is 10 atm * (3.0/5.0) = 6.0 atm. The amount of hydrogen present is doubled from 3.0 to 6.0 moles, so the partial pressure will increase proportionally to 12.0 atm.
This is the ELECTRON geometry around the central atom in the molecule IF5.
What is octahedral?
The pH of 1M of an acid with Ka = 4 x 10^-6
What is pH = 2.7?
In the molecule CH4 what this the measurement of the C--H bond angle?
109.5