Gases
A gas occupies 2.0 L at 1.0 atm. If the temperature and amount of gas remain constant, what volume will it occupy at 2.0 atm?
1.0 L
What is the strongest intermolecular force present between water molecules?
Hydrogen bonding
What property of a liquid describes its resistance to flow?
Viscosity
What does chemical kinetics study?
The rate of chemical reactions and the factors that affect reaction rates.
Which Mexican president ordain the oil expropriation in 1938?
Which gas law states that, at constant temperature, pressure and volume are inversely proportional?
Boyle’s Law
Which of the following substances experience London dispersion forces: CH₄, H₂O, or both?
Both. All molecules experience London dispersion forces.
What property allows some insects to walk on the surface of water?
Surface tension
Name two factors that can increase the rate of a chemical reaction.
Temperature, concentration, physical state of reactants, or adding a catalyst.
Which 2013 video game, developed by Naughty Dog, follows the story of Joel and Ellie in a post-apocalyptic world?
The Last of Us
A gas occupies 3.0 L at 300 K. If the pressure remains constant, what volume will it occupy at 600 K?
6.0 L
Why does H₂O have a much higher boiling point than H₂S, even though they have similar structures?
H₂O forms hydrogen bonds, while H₂S does not.
Why does water boil at a lower temperature at high altitude than at sea level?
Atmospheric pressure is lower at high altitude, so water reaches its vapor pressure at a lower temperature.
What generally happens to the reaction rate when temperature increases, and why?
The reaction rate generally increases because more molecules have enough energy to overcome the activation energy.
Which artist released the album Renaissance in 2022?
Beyoncé
How many moles of an ideal gas are present in a 10.0 L container at 1.00 atm and 273 K?
0.445 mol
Arrange the following substances from weakest to strongest intermolecular forces:
CH₄, NH₃, H₂O
CH₄ < NH₃ < H₂O
What type of solid contains atoms connected through a three-dimensional network of covalent bonds? Give one example.
Covalent-network solid; for example, diamond or SiO₂.
What does the activation energy represent in a chemical reaction?
The minimum energy required for reactants to reach the transition state and undergo the reaction.
Why do we see the Moon even though it does not produce its own light?
Because it reflects the Sun's light
Two gases, A and B, are at the same temperature. Gas A has a molar mass four times greater than gas B. Which gas has the greater average molecular speed, and approximately how many times greater is it?
Gas B; approximately 2 times faster.
Two liquids have similar molar masses. Liquid A has stronger intermolecular forces than liquid B. Which liquid will have a higher viscosity, and why?
Liquid A, because stronger intermolecular forces make it more difficult for molecules to move past one another.
Why is ice less dense than liquid water?
Hydrogen bonding creates a more open structure in ice, increasing its volume and therefore decreasing its density.
A reaction has a very high activation energy. How would a catalyst affect this reaction? Does the catalyst change the energy of the reactants or products?
A catalyst lowers the activation energy by providing an alternative reaction pathway. It does not change the energy of the reactants or products or the equilibrium position.
Which country in Africa has Spanish as their official language?
Republic of Equatorial Guinea