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agasfer [191]
2 years ago
10

1. Intermolecular forces do not have any effect on determining the physical properties of substances such as surface tension and

melting point.
a. TRUE
b. FALSE

2. The solids and liquids with the strongest intermolecular forces of attraction will have the lowest melting and boiling points.
a. TRUE
b. FALSE

3. In carbon dioxide, London dispersion forces are the only intermolecular forces of attraction.
a. TRUE
b. FALSE

4. Intermolecular hydrogen bonding plays an important role in the structure of polymers.
a. TRUE
b. FALSE

5. The intermolecular forces of attraction in hydrogen gas are stronger than those of helium gas.
a. TRUE
b. FALSE

6. At room temperature and 1 atm, covalent crystals are solid.
a. True
b. False

7. Intermolecular forces hold the oxygen and hydrogen atoms together in a water molecule.
a. TRUE
b. FALSE

8. In a diamond, each carbon atom is covalently bonded to four other carbons in a _____.
a. Polyhedron
b. Hexagon
c. Pentagon
d. Tetrahedron

9. As the temperature increases, the molecular motion of the molecules decreases and it becomes difficult to overcome the polar attractions.
a. TRUE
b. FALSE

10. Intermolecular forces can exist between:
a. Atoms
b. Molecules
c. Ions
d. All of the above
Chemistry
1 answer:
Scilla [17]2 years ago
5 0

Answer:

1)false

2) false

3)True

4)True

5) false

6)false

7) true

8) d

9)false

10) b

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Calculate the number of hydrogen atoms in 33.0 g CH4
Elena-2011 [213]

Answer:

The number of hydrogen atoms is 4.96x10²⁴.

 

Explanation:

The number of atoms can be found with the following equation:

n = N*\eta_{H}

Where:

N: is the Avogadro's number = 6.022x10²³ atoms/mol

η: is the number of moles of hydrogen

n: is the number of hydrogen atoms

First, we need to find the number of hydrogen moles. The number of moles of CH₄ is:

\eta_{CH_{4}} = \frac{m}{M}

Where:

m: is the mass of methane = 33 g

M: is the molar mass of methane = 16.04 g/mol                      

\eta_{CH_{4}} = \frac{33 g}{16.04 g/mol} = 2.06 mol

Now, since we have 4 hydrogen atoms in 1 mol of methane, the number of moles of hydrogen is:

\eta_{H} = 2.06\: mol\: CH_{4}*4 \frac{mol\: H}{mol \: CH_{4}} = 8.24 mol

Hence, the number of hydrogen atoms is:

n = N*\eta_{H} = 6.022 \cdot 10^{23} \: atoms/mol*8.24 mol = 4.96 \cdot 10^{24} atoms

Therefore, the number of hydrogen atoms is 4.96x10²⁴.

I hope it helps you!      

3 0
3 years ago
In a Lewis structure for carbon tetrachloride (CCl4), which of the following is the central atom?
Sonbull [250]
Carbon is the answer it is the main molecule in the atom
3 0
3 years ago
Which equation is set up correctly to determine the volume of a 1.5 mole sample of oxygen gas at 22°C and 100 kPa?
LenKa [72]

The volume could be calculated by using  <span>V = n RT / P </span>

In which V = Volume
n = number of Moles
R= The Gas constant
T = Temperature (ideally this would be in Kelvin, but i don't see it in the option)
P = Pressure


I believe the answer is

 <span>V = (1.5mol) (0.08205 L*kPa/K*mol) (22Celsius)/100 kPa 


</span>
6 0
3 years ago
What is the total number of Joules of heat absorbed by 65.0 grams of water when the temperature of the water is raised from 25°C
Norma-Jean [14]

Answer:

Total number of heat absorbed is 4.08kJ

Explanation:

Explanation is contained in the picture attached

5 0
3 years ago
Abnormal behavior is defined as a?
hodyreva [135]

Answer:

Abnormality is a behavioral characteristic assigned to those with conditions regarded as rare or dysfunctional. Behavior is considered abnormal when it is atypical or out of the ordinary, consists of undesirable behavior, and results in impairment in the individual's functioning

Explanation:

5 0
3 years ago
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