The Ties That Bind
This is the strongest type of intermolecular force, occurring when hydrogen is bonded to nitrogen, oxygen, or fluorine.
What are hydrogen-bonds?
A gas occupies 2.0 L at 1.0 atm. If you compress the volume to 1.0 L at constant temperature, this is the new pressure.
What is 2.0 atm?
This term describes the substance that is being dissolved in a solution, such as salt in saltwater.
What is a solute?
If a first-order reaction has a rate constant k= 0.10 min⁻¹, this is the approximate time in minutes required for a sample of the reactant to decay to exactly 25% of its initial concentration.
What is 14 minutes?
In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, this specific element is being oxidized.
What is Zinc?
The ranking of these molecules in increasing order by their solubility in water C₆H₁₄, CH₃CH₂OH, CH₃CH₂CH₂CH₂OH.
What is C6H14 < CH3CH2CH2CH2OH < CH3CH2OH?
A gas container holds a mixture of nitrogen, hydrogen, and oxygen. The total pressure is 3.57 atm. If the partial pressure of nitrogen is 0.800 atm and oxygen is 1.46 atm, this is the partial pressure of hydrogen.
What is 1.31 atm?
You dissolve 2.0 moles of sugar into enough water to make a total of 4.0 L of solution. This is the molarity.
What is 0.5M?
For the gaseous equilibrium system
N2(g)+3H2(g)->2NH3(g),
adding inert argon gas to the container at a constant volume causes this specific shift in the equilibrium position.
What is no shift?
At 300.0K, a reaction has a standard enthalpy change of -40.0 kJ/mol and a standard entropy change of -100.0 J/mol*K. This is the value of the equilibrium constant.
What is 54.6?
The ranking of these molecules by boiling point from lowest to highest: CH₄, CH₃CH₃, CH₃CH₂CH₃.
What is CH4 < CH3CH3 < CH3CH2CH3?
The number of moles of gas at a pressure of 2.9atm, volume of 8.6L, and temperature of 356K.
What is 0.85 moles?
This is the concentration of hydroxide ions (OH-) in a diluted solution of NaOH that has a measured pH of 11.
For a reaction with the rate law Rate = k[A]2[B], this is the factor by which the initial rate increases if the concentration of A is doubled and B is tripled.
What is 12?
This is the oxidation number of a single chromium atom in the dichromate polyatomic ion, Cr2O72-
What is +6?
The ranking of these compounds by the strength of their intermolecular forces from weakest to strongest: H₂O, H₂S, H₂Se
What is H2S < H2Se < H2O?
Two gases, Helium (4 g/mol) and Oxygen (32 g/mol), effuse out of a tiny hole. This is how many times faster Helium travels compared to Oxygen.
What is 2.83x faster?
The concentration of the diluted solution that results from mixing 4.0L of 6.2M HCl and 8.9L of water.
What is 1.9M?
A reaction has a rate constant k1=0.15 s-1 at 300K and an activation energy Ea=3.46 kJ/mol. This is the value of the new rate constant k2 when the temperature is raised to 600K.
What is 0.30 s-1?
Given the target reaction C(s) + 2H2(g) -> CH4(g), this is the total enthalpy change using these steps
1) C(s) + O2(g) -> CO2(g) ΔH=-394 kJ
2) H2(g) + 0.5O2(g) -> H2O(l) ΔH=-286 kJ
3) CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) ΔH=-890 kJ
What is -76 kJ?
The ranking of these isomers from lowest to highest boiling point: neopentane (highly branched), isopentane (slightly branched), and n-pentane (straight chain).
What is neopentane < isopentane < n-pentane?
You react excess solid sodium azide in a car airbag according to the equation 2NaN₃(s) → 2Na(s) + 3N₂(g). To produce exactly 67.2 Liters of N₂ gas at standard temperature and pressure (STP, where 1 mole = 22.4 L), this is the minimum number of moles of solid NaN₃ you must react.
What is 2.0 moles?
In the net ionic equation for the reaction between weak acid hydrofluoric acid (HF) and strong base potassium hydroxide (KOH), this specific cation serves as the only spectator ion.
What is K+?
For the reaction H2 (g) + I2 (g) -> 2HI (g) with a Kc of 49.0, if you start with 1.0 M of both reactants, this will be the equilibrium molarity of the product, HI.
What is 1.56M?
When the redox reaction MnO4-(aq) + I-(aq) -> MnO2(s) + I2(s) is completely balanced in a basic solution, this is the stoichiometric coefficient for the hydroxide ion (OH-)
What is 4?