ExamBon True or False

Pressure and Volume for gases are directly proportional.

False

Compared to the size of atoms and molecules,
gas particles are very far from each other.

True

Ideal gas particles behave like rubber magnets that attract and repel each other as they bounce around.

False

DNA strands are held together by intermolecular forces such as hydrogen bonding.

T

Hydrogen bonding is a result of having any hydrogen present in molecules.

False

The average Kinetic Energy of gas particles is directly proportional to their temperature.

T

Arrhenius base is a proton acceptor while Bronsted-Lowry base produces OH? ions.

False

Ion-dipole forces are stronger than London Dispersion Forces.

True

An Electrolyte solution contains dissolved covalent molecules.

False

H?SO? is a strong diprotic acid

True

Temperature and Volume are indirectly proportional.

False

Strong Intermolecular forces such as HYDROGen bonding are responsible for holding together two strands of DNA

True

Definition of an Arrhenius base is one that produce H? ions.

False
(An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons. In other words, it increases the number of H+ ions in the water. In contrast, an Arrhenius base dissociates in water to form hydroxide ions, OH-.)

The strongest intermolecular forces are dipole-dipole forces.

False

The end point of a titration is reached when the solution changes from acidic to basic.

False
Endpoint = 7 = neutral
(During the process, two important stages known as endpoint and equivalence point are reached. An equivalence point in a titration refers to a point in which the added titrant is chemically equivalent to the analyte in the sam

H?SO? is a weak diprotic acid.

False

The kinetic molecular theory of gases describes gases as they truly exist.

False
(Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. Kinetic Molecular Theory can be used to explain both Charles' and Boyle's Laws. The average kinetic energy of a collection of gas pa

A saturated solution simply contains a lot of solute

False
(An unsaturated solution can dissolve more solute. ... When the solute has reached its solubility limit, for a given solvent and conditions, the solution becomes saturated. A saturated solution will not dissolve any more solute and any extra solute

Chemistry is the best subject ever

True

Standard temperature and pressure are:

1 atm and 273 Kelvin
or 1 atm 0� C

Which of the following have dipole-dipole present as their primary intermolecular force.

Carbon monoxide CO = dipole - dipole
(ethane = non-polar / dispersion force.
* methane (CH4 = intermolecular force) London dipersion-non-polar
*Dissolve table salt NaCl (aq) ion-dipole and polar)

A solution that s saturated with both oxygen gas and barium chloride at 75 celcius is heated to a boil . What happened?

Some oxygen gas bubbles out of solution

The tendency of a liquid to feel thick is

viscosity

a solution containing 43.67 g methanol and 0.245L of water (density 1.00g/mL) has a mass percent solute of:

None of above
or if the answer is 15.1%

Which is False regarding the boiling point of a liquid?

All of the above statement are truth

If a sample of gas initially at 2:50 atm and 1.55 L is pressurized to 45 atm, what will be the new volume

0.086L

Solubility of gases in water

Increase with increasing pressure above the solution.

Which combination below will be a buffer solution?

HC?H?O? and NaCh?O?

What is the concentration of H? in a 0.121 M H?SO? solution?

0.242M
0.121+0.121

A solution is saturated in both nitrogen gas N? and potassium chloride kcl what happens when the solution is cooled to room temperature?

Some potassium chloride precipitates out of solution.