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3 years ago

Which statement is true regarding the formation of ionic bonds?

Chemistry

1 answer:

marishachu [46]3 years ago

5 0

Answer: (b). Atoms transfer electrons to form cations and anions.

Explanation:

Covalent compounds are formed by sharing of electrons takes place between non metals.Ionic compounds are formed by transfer of electrons between metals and non metals.

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Sodium atom has oxidation number of +1.

Electronic configuration of sodium:

$[Na]=1s^22s^22p^63s^1$

Sodium atom will loose one electron to gain noble gas configuration and form sodium cation with +1 charge.

$[Na^+]=1s^22s^22p^63s^0$

Chlorine atom has oxidation number of -1.

Electronic configuration of chlorine:

$[Cl]=1s^22s^22p^63s^23p^5$

Chlorine atom will gain one electron to gain noble gas configuration and form chloride ion with -1 charge.

$[Cl^-]=1s^22s^22p^63s^23p^6$

In sodium chloride the one electron from sodium metal gets transferred to chlorine atom and thus form an ionic bond.

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While washing his hands before the client consultation with Chloe, Jayden dropped some water onto the countertop. When he came b

Anastaziya [24]

Answer:

The water molecules turned into gas called "water vapor" and are now part of the air.

Explanation:

The "drops of water" are actually made up of water molecules. Under heat, they change their phase from liquid to gas. This means that the water molecules move faster. Such movement allows the molecules to escape into the atmosphere as gas. Such gaseous state of water is called "water vapor" (transparent in color).

The client consultation must have taken time that the drops of water evaporated when Jayden came back.

Aside from evaporation, water vapor may also be produced through the process called "sublimation." This happens when ice directly turns into gas without becoming a liquid.

So, this explains the answer.

3 0

3 years ago

Butylated hydroxytoluene (BHT) is used as an antioxidant in processed foods. (It prevents fats and oils from becoming rancid.) A

Svetllana [295]

Answer:

Molecular mass of BHT is 204,2 g/mol

Explanation:

To answer this question you need to know that Freezing-point depression (A colligative property) is the decrease of the freezing point of a solvent on the addition of a non-volatile solute. The formula is:

ΔT = Kf m

Where ΔT is the freezing point depression (5,5°C - 4,880°C = 0,62°C

Kf that is freezing point molar constant of the solvent (5,065°C/m)

And m that is molality (moles of solute/kg of solvent). Replacing:

$m = 0,1224 \frac{mole Solute}{kgSolvent}$

Knowing you have 100,0g of solvent ≡ 0,1000 kg:

$\frac{0,1224 moles}{1 kg Solvent} *0,1000 kg$ = 0,01224 moles of solute ≡ BHT

As grams of BHT are 2,500, molecular mass of BHT is:

$\frac{2,500g}{0,01224 moles BHT} =$ 204,2 g/mol

I hope it helps

3 0

3 years ago

A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm,

belka [17]

To solve this we assume that the gas inside the balloon is an ideal gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant pressure and number of moles of the gas the ratio T/V is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

T1 / V1 = T2 / V2

V2 = T2 x V1 / T1

V2 = 313.15 x 3.50 / 298.15

V2 = 3.68 L

6 0

3 years ago

Read 2 more answers

What is the correct interpretation of the mole ratios for the elements in

VLD [36.1K]

Answer:

6 moles of C atoms, 12 moles of H atoms and 6 moles of O atoms

Explanation:

A chemical formula represents the number of moles of atoms presents in 1 mole of the compound.

For example, for 1 mole:

CₐHₓ, you have a moles of carbon and x moles of hydrogen.

Thus, for the molecule:

C₆H₁₂O₆, you have 6 moles of C atoms, 12 moles of H atoms and 6 moles of O atoms

6 0

3 years ago

Using the same sample of gas (P1 = 565 torr , T1 = 27 ∘C ), we wish to change the pressure to 5650 torr with no accompanying cha

Stels [109]

Answer:

2726.85 °C

Explanation:

Given data:

Initial pressure = 565 torr

Initial temperature = 27°C

Final temperature = ?

Final pressure = 5650 torr

Solution:

Initial temperature = 27°C (27+273 = 300 K)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

T₂ = P₂T₁ /P₁

T₂ = 5650 torr × 300 K / 565 torr

T₂ = 1695000 torr. K /565 torr

T₂ = 3000 K

Kelvin to degree Celsius:

3000 K - 273.15 = 2726.85 °C

4 0

3 years ago