Can someone please help me determine if these questions are correct. If there not can you point me in the rightdirection...please...please...and thank you!
1. Compared to the particles of a gas, the particles of a liquid
a. Are not in constant motion
b. Collide with the sides of the container, but not with each other
c. Do not completely fill their container
d. Can move longer distances
e. Have more space between the molecules
I believe this is C- do not completely fill their container, is that correct?
2. Compared to ionic and covalent bonds, the strength of intermolecular forces are
a. Substantially greater
b. Slightly greater
c. Slightly less
d. Substantially less
e. The same
I think it’s D- substantially less, is that right or no?
3. The strength of temporary dipole attractions
a. Increases with the size of molecules
b. Decreases with the size of molecules
c. Is greater than other intermolecular forces
d. Is greater than intramolecular forces (ionic and covalent bonds)
e. Is the same for all types of substances
I believe this is A- increases with the size of molecules, or B can someone help me, is that right?
4. Which of the following is not a property of gases?
a. Gases can be compressed into smaller spaces
b. Gases diffuse throughout other gases
c. Gases exert pressure on objects
d. Gases are weightless near the surface of the earth
e. Gases have low densities
I think this is D, but I need some one’s opinion, please help?
5. A pressure of 345 mmHg expressed in torr would be
a. 345 torr
b. 0.454 torr
c. 262,000 torr
d. 3.40 torr
e. 23.5 torr
I believe this is A- 345 torr, is that correct?
6. Which of the following is not an equivalent value?
a. 760 cmHg
b. 1 atm
c. 101.325 kPa
d. 101,325 Pa
e. 14.7 Ib/in.2
I have A- 760 cmHg, is that right?
All look ok to me. Good work.
1. The correct answer is c. Do not completely fill their container. The particles of a liquid have less space between them compared to a gas, but they still do not completely fill their container.
To determine this answer, you need to understand the properties of gases and liquids. Gases have particles that are in constant motion, collide with each other and the container walls, and fill their container completely. On the other hand, the particles of liquids have more intermolecular attractions, which restrict their movement and prevent them from completely filling their container.
2. The correct answer is d. Substantially less. Intermolecular forces are weaker compared to ionic and covalent bonds.
To determine this answer, you should understand the different types of chemical bonds. Ionic bonds involve the complete transfer of electrons between atoms, resulting in strong electrostatic attractions. Covalent bonds involve the sharing of electrons between atoms, which also creates strong attractions. Intermolecular forces, however, are weaker attractions that exist between molecules. They include London dispersion forces, dipole-dipole interactions, and hydrogen bonding. These forces are generally much weaker than ionic and covalent bonds.
3. The correct answer is a. Increases with the size of molecules. The strength of temporary dipole attractions increases as the size of molecules increases.
To determine this answer, you should be familiar with temporary dipole attractions (also known as London dispersion forces). These forces occur due to temporary fluctuations in the electron distribution within a molecule, causing a temporary dipole. Larger molecules have more electrons and a greater surface area, leading to stronger temporary dipole attractions.
4. The correct answer is d. Gases are weightless near the surface of the earth. Gases, like any other matter, have weight and are not weightless near the surface of the earth.
To determine this answer, you should understand the properties of gases. Gases have mass and therefore experience weight, which is the force due to gravity. Although gases can expand and occupy larger volumes, they still have weight and are influenced by gravity.
5. The correct answer is a. 345 torr. mmHg and torr are equivalent units for pressure, so there is no conversion needed.
To determine this answer, you should be familiar with the conversion between different units of pressure. mmHg (millimeters of mercury) and torr are two common units used to measure pressure, and they are equivalent.
6. The correct answer is e. 14.7 Ib/in.2. Ibs/in.2 (pounds per square inch) is not an equivalent value to the other units mentioned, which are all standard units of pressure.
To determine this answer, you should be familiar with the conversion between different units of pressure. cmHg (centimeters of mercury), atm (atmospheres), kPa (kilopascals), and Pa (pascals) are all standard units of pressure used in scientific measurements. Ib/in.2 is a non-standard unit primarily used in the United States.