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Hitman42 [59]
2 years ago
9

How does the electron-cloud model describe electrons?

Chemistry
1 answer:
Vedmedyk [2.9K]2 years ago
6 0

An electron has a high probability of being in certain regions. Hence, option C is correct.

<h3>What is the meaning of electron cloud?</h3>

The system of electrons surrounding the nucleus of an atom.

The electron cloud model tells us that electrons are found in defined energy states outside of the nucleus of the atom. The lowest possible state for an electron is called its ground state.

The energy levels can only hold a certain number of electrons at any time and the organization of these electrons in the electron cloud is called the atom's electron configuration.

Energy levels describe distances from the nucleus in which electrons can be found. There is a maximum number of electrons that can be found at any particular energy level due to the limitations of its size.

Hence, an electron has a high probability of being in certain regions.

Learn more about the electron clouds here:

brainly.com/question/489097

#SPJ1

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The lone pair of electrons on the oxygen atom in an ester can form hydrogen bonds in some situations, but esters cannot form hyd
mixer [17]

Answer:

Esters have lower boiling point than alcohols.

Explanation:

Esters are the fruity smelling compounds which are formed from carboxylic acid and alcohol with the removal of water.

The general formula for the ester is RCOOR' which is prepared from RCOOH acid and R'OH alcohol.

Ester can not form strong hydrogen bond as there is no hydrogen attached to the electronegative atom in the ester and thus cannot form hydrogen bonds with each other.<u> Due to this factor, the interactions within the molecules of the ester is lower than that of alcohols which exist in strong hydrogen bonding. As a result, ester can be easily boiled when compared to the alcohols and thus they have lower value of boiling points.</u>

4 0
3 years ago
The road map in the text shows that to convert from one unit to another, you must use the ____ as an intermediate step. ___ conv
jonny [76]

Answer:

Conversion factor;

Molar mass;

Avogadro's constant and molar mass

Explanation:

  • Firstly, an intermediate step is to define the conversion factor that will be then used in a conversion technique called dimensional analysis in order to convert from one unit to another. An example of a conversion factor would be, for example, 1 L = 1000 mL, which can be manipulated as a fraction, either \frac{1 L}{1000 mL} or \frac{1000 mL}{1 L};
  • Secondly, in order to convert mass to moles, we need to know the molar mass of a compound which has a units of g/mol (that is, it shows how many grams we have per 1 mole of substance.
  • Thirdly, Avogadro's constant, N_A = 6.022\cdot 10^{23} mol^{-1} tells us that there is N_A number of molecules or atoms in 1 mole of substance. We need two conversion factors to convert the number of molecules to a mass: firstly, we need to convert the number of molecules into the number of moles using Avogadro's constant and then we need to use the molar mass to convert the moles obtained into mass.
5 0
3 years ago
1. How many moles are in 493.4 grams of calcium phosphide?
finlep [7]
Formula = Ca3P2
RAM of; Ca = 40 x 3 = 120g, P = 30 x 2 = 60g. 120 + 60 = 180g

Mole = 493.4g / 180g = 2.74mols
8 0
3 years ago
It takes 1 kcal to raise the temperature of 1 kg of liquid water by 1 C, but only 0.5 kcal to raise the temperature of 1 kg of i
belka [17]

Answer:

a. 50KCal

b. 400KCal

c. Same as (a) above

Explanation:

Given

To raise the temperature of 1kg of liquid water at 1°C requires 1KCal

To raise the temperature of 1kg of ice or water vapour by 1°C requires 0.5KCal

To melt 1kg of ice at 0°C requires 80KCal

To evaporate 1kg of liquid water sitting at 100°C requires 540KCal

a. How much heat is required to raise the temperature of 5 kg of liquid water by 20 C?

To raise the temperature of 5 kg of ice by 20°C requires:

5 kg * (0.5 kcal / kgC) * 20C

= 50 KCal

b. How much heat is required to melt 5 kg of ice at 0 C?

To melt an ice of 5 kg of ice at 0 C requires:

5 kg * (80 kcal / kg)

= 400 KCal

c. Same as (a) above

6 0
3 years ago
When a sodium (Na) atom forms an ion so that it looks like a noble gas with a full valence shell, what will its charge be?
Setler79 [48]

Answer:

I believe 1+

Explanation:

when Na loses 1 electron in the outer shell it has 8 valence protons on it's new most outer shell. so now it has 11 protons and 10 electrons. that extra proton (positively charged) adds one extra charge. so +1

5 0
3 years ago
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