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olga55 [171]
3 years ago
7

The ease with which the charge distribution in a molecule can be distorted by an external electric field is called the___. A) el

ectronegativity B) hydrogen bonding C) polarizability D) volatility E) viscosity The intermolecular force(s) responsible for the fact that CH_4 has the lowest boiling point in the set CH_4, SiH_4, CeH_4, SnH_4 is/are___. A) hydrogen bonding B) dipole-dipole interactions C) London dispersion forces D) mainly hydrogen bonding but also dipole-dipole interactions E) mainly London-dispersion forces but also dipole-dipole interactions Of the following substances, only_____ has London dispersion forces as the only intermolecular force A) CH_3 OH B) NH_3 D)Kr E) HCI In liquids, the attractive intermolecular forces are___. A) very weak compared with kinetic energies of the molecules B) strong enough to hold molecules relatively close together C) strong enough to keep the molecules confined to vibrating about their fixed lattice points D) not strong enough to keep molecules from moving past each other E) strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other
Chemistry
1 answer:
muminat3 years ago
4 0

Answer:

Question 1

C) polarizability

Question 2

C) London dispersion forces

Question 3:

D)Kr

Question 4:

E) strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other

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Sodium metal reacts with water to produce hydrogen gas according to the following equation: 2Na(s) + 2H2O(l)2NaOH(aq) + H2(g) Th
Maru [420]

Answer:

Number of moles of sodium reacted = 0.707 moles

Explanation:

P(H₂) = P(T) – P(H₂O)

P(H₂) = 754 – 17.5 = 736.5 mm Hg

Use the ideal gas equation which

PV= nRT, where P is the pressure V is the volume, n is the number of moles R is the Gas Constant and T is temperature

<u>Re- arrange to calculate the number of moles and using the data provided</u>

n = P x V/R x T

n =736.5 x 8.77/62.36367 x (mmHg/mol K) x (20 + 273)

n = 0.35348668

n = 0.353 moles H₂

<u>from the equation we know that</u>

0.353 mole H₂ x 2mole Na/1mole H₂, So

0.353 x 2 = 0.707 mole Na

The number of moles of Sodium metal reacted were 0.707 moles.

3 0
3 years ago
Question 5 (1 point)<br> Potassium Bromide is insoluble.<br> O True<br> O False
Delicious77 [7]
Is soluble in water but not soluble in acetonitrile.

So i think its false
4 0
3 years ago
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How many molecules are in
diamong [38]

Answer:

3.6 × 10²⁴ molecules

Explanation:

Step 1: Given data

Moles of methane (n): 6.0 moles

Step 2: Calculate the number of molecules of methane in 6.0 moles of methane

In order to convert moles to molecules, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules of methane in 1 mole of molecules of methane.

6.0 mol × 6.02 × 10²³ molecules/1 mol = 3.6 × 10²⁴ molecules

6 0
3 years ago
How many molecules are in 68.0 g of H2S
Kryger [21]

The correct answer is 12.044 × 10²³ molecules.  

The molecular mass of H₂S is 34 gram per mole.  

Number of moles is determined by using the formula,  

Number of moles = mass/molecular mass

Given mass is 68 grams, so no of moles will be,  

68/34 = 2 moles

1 mole comprises 6.022 × 10²³ molecules, therefore, 2 moles will comprise = 6.022 × 10²³ × 2

= 12.044 × 10²³ molecules.  


3 0
3 years ago
How many molecules are in 3 moles of NaCl?
PtichkaEL [24]

Answer:

Given : No. Of moles = 1.5

To calculate : no. Of molecules =N

We know that moles = N / 6.022 x 10²³

Therefore, 1.5 x 6.022 x 10²³ = N

Hence N = 9.0330x 10²³ molecules

3 0
3 years ago
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