Gas Laws
A 2.0 L balloon at 25C is heated to 50C at constant pressure. WHat is the new volume?
2.17L
Identify the strongest IMF in CH3OH
Hydrogen Bonding
If the frequency of a metal is 5.0 x 1014 Hz, will light with 700nm eject electrons?
No, the frequency is lower than the threshold.
What is the pH of a 0.001 M NaOH solution?
11
Write the Kc expression for: CaCO3(s)<>Ca)(s)+CO2(g).
Kc=[CO2]
How many grams of O2 are in a 5.0L tank at 2.0atm and 27C?
13.0g
Rank F2, Cl2, and Br2 in order of increasing boiling point.
F2<Cl2<Br2
Write the ground-state electron configuration for the Cu+ ion
[Ar]3d10
Find the pH of 1.0 M HF (Ka=7.2 x 10-4).
2.07
A<>2B. At equilibrium, [A]=0.1M and [B]=0.4M. Find Kc.
1.6
A mixture of 2g H2 and 8g He has a total pressure of 1.5 ATM. Find the partial pressure of H2.
0.5 atm
C5H12 has a higher vapor pressure than C8H18 at the same temperature. Explain why.
C5H12 has weaker LDFs, meaning fewer forces to overcome to become a gas.
Why is the first ionization energy of Mg higher than Al?
The 3p electron is easier to remove than a 3s electron.
A buffer contains 0.5 M CH3COOH and 0.5 M NaCH3COO. If 0.01 mol HCl is added to 1L, find the new ph (pKa=4.74).
4.72
For N2+3H2<> 2NH3, what happens to [NH3] if temperature increases and volume decreases?
The effects are opposing; one must know the magnitude of change to determine the net shift.
Zn(s) reacts with HCl to produce H2 gas collected over water at 25C(PH2O=23.8torr).If total pressure is 760 torr and volume is 0.5 L, find the mass of Zn reacted.
1.29g
Which gas deviates most from ideal behavior at low temperatures: Ne or NH3? And explain why.
NH3, because its strong IMFs cause particles to stick more, reducing pressure compared to ideal predictions.
In a Photoelectron Spectroscopy spectrum, why is the 2s peak of Oxygen further to the left than the 2s peak of Nitrogen?
Oxygens greater nuclear charge attracts the 2s electrons more strongly.
Calculate the pH at the equivalence point when 50mL of 0.1M CH3COOH is titrated with 0.1M NaOH. (Ka=1.8x10-5).
8.72
H2(g) + I2(g)<>2HI(g) with Kc=50. If starting with 1.0M of H2 and I2, find equilibrium [HI].
1.56M