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3 years ago

2. Why is the lonic compound Nacl (table salt) able to dissolve in a glass of the molecular compound water (H20)? (3 points)

Chemistry

1 answer:

melomori [17]3 years ago

6 0

Answer:

The correct answer is C ions from the solute molecules have a strong attraction to the polar solvent molecules.

Explanation:

NaCl or Sodium chloride is an ionic compound which easily get dissolved in polar molecular compound such as water(H2O).

Both NaCl and H2O are polar compound because the atoms that forms NaCl and H2O have vast difference in their electronegativities.As a result the bonding electrons in both NaCl and H2O are not equally shared.

NaCl get dissolved in water molecules by dipole dipole interaction.

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What are the names of the 2 products when zinc reacts with hydrochloric acid?

serious [3.7K]

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7 0

3 years ago

The temperature in a town started out at 55 degrees. By the end of the day the temperature dropped to -6 degrees.

garik1379 [7]

Answer:

The choice of the answer is fourth option that is -61 degrees.

Therefore the temperature drop is -61°Centigrade.

Explanation:

Given:

The temperature in a town started out at 55 degrees

Start temperature = 55°Centigrade. (Initial temperature)

End of the Day = -6°Centigrade. (Final temperature)

To Find:

How far did the temperature drop?

Solution:

We will have,

$\textrm{Temperature drop}=\textrm{Final temperature}-\textrm{Initial temperature}$

Substituting the above values in it we get

$\textrm{Temperature drop}=-6-55\\\\\therefore \textrm{Temperature drop}=-61\° centigrade$

Therefore the temperature drop is -61°Centigrade.

4 0

4 years ago

Name the element described in each of the following:

Likurg_2 [28]

A collection of elements in a group share chemical properties.

What is Periodic Table?

The elements are arranged in groups and periods on the periodic table. There is a great deal of chemical similarity between the elements in the same group. Only the number of valence shells is the same for elements that belong to the same period.

Each statement refers to the following elements:

(a) Smallest atomic radius in Group 6A(16) - oxygen

(b) Largest atomic radius in Period 6 - cesium

(d) Highest IE₁ in Group 4A(14) - carbon

(e) Lowest IE₁ in Period 5 - Bismuth

(g) Group 3A(13) element that forms the most basic oxide - Thallium

(h) Period 4 element with filled outer level - krypton

(i) Condensed ground-state electron configuration of [Ne] 3s²3p² - silicon

(j) Condensed ground-state electron configuration of [Kr] 5s²4d⁶- xenon

(k) Forms 2+ ion with electron configuration [Ar] 3d³ - vanadium

(l) Period 5 element that forms 3+ ion with pseudo–noble gas configuration - Indium

(m) Period 4 transition element that forms 3+ diamagnetic ion - Scandium

(n) Period 4 transition element that forms 2+ ion with a halffilled d sublevel - Manganese

(o) Heaviest lanthanide - Lutetium

(p) Period 3 element whose 2- ion is isoelectronic with Ar - sulfur

(q) Alkaline earth metal whose cation is isoelectronic with Kr - Strontium

(r) Group 5A(15) metalloid with the most acidic oxide - nitrogen

To learn more about periodic table click on the link below:

brainly.com/question/569321

#SPJ4

4 0

2 years ago

is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that carbonic acid can undergo when it's d

Burka [1]

Answer:

H₂CO₃ H₂O ⇄ HCO₃⁻ + H₃O⁺ Ka1

HCO₃⁻ + H₂O ⇄ CO₃⁻² + H₃O⁺ Ka2

CO₃⁻² + H₂O ⇄ HCO₃⁻ + OH⁻ Kb1

HCO₃⁻ + H₂O ⇄ H₂CO₃ + OH⁻ Kb2

Explanation:

Formula for carbonic acid is: H₂CO₃

It is a dyprotic acid, because it can release two protons. We can also mention that is a weak one. The equilibrums are:

H₂CO₃ H₂O ⇄ HCO₃⁻ + H₃O⁺ Ka1

HCO₃⁻ + H₂O ⇄ CO₃⁻² + H₃O⁺ Ka2

When the conjugate strong bases, carbonate and bicarbonate take a proton from water, the reactions are:

CO₃⁻² + H₂O ⇄ HCO₃⁻ + OH⁻ Kb1

HCO₃⁻ + H₂O ⇄ H₂CO₃ + OH⁻ Kb2

Notice, that bicarbonate anion can release or take a proton to/from water. This is called amphoteric,

6 0

3 years ago

A student is doing an experiment to determine the effects of temperature on an object. He writes down that the initial temperatu

bogdanovich [222]

Answer:

1) The Kelvin temperature cannot be negative

2) The Kelvin degree is written as K, not ºK

Explanation:

The temperature of an object can be written using different temperature scales.

The two most important scales are:

- Celsius scale: the Celsius degree is indicated with ºC. It is based on the freezing point of water (placed at 0ºC) and the boiling point of water (100ºC).

- Kelvin scale: the Kelvin is indicated with K. it is based on the concept of "absolute zero" temperature, which is the temperature at which matter stops moving, and it is placed at zero Kelvin (0 K), so this scale cannot have negative temperatures, since 0 K is the lowest possible temperature.

The expression to convert from Celsius degrees to Kelvin is:

$T(K)=T(^{\circ}C)+273.15$

Therefore in this problem, since the student reported a temperature of -3.5 ºK, the errors done are:

1) The Kelvin temperature cannot be negative

2) The Kelvin degree is written as K, not ºK

6 0

4 years ago