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3 years ago

Classify the following compounds as ionic or covalent: a. MgCl2 b. Na2S c. H2O d. H2S

Chemistry

2 answers:

tia_tia [17]3 years ago

6 0

Explanation:

A compound in which there occurs sharing of electrons from atom to another is known as a covalent compound.

For example, atomic number of hydrogen is 1 and atomic number of oxygen is 8.

As electronic distribution of oxygen atom is 2, 6. So, in order to complete its octet it will share its valence electrons with two hydrogen atoms.

Hence, it will form $H_{2}O$ compound which is covalent in nature.

Whereas, a compound in which there occurs transfer of electrons from one atom to another is known as an ionic compound.

For example, atomic number of magnesium is 12 and atomic number of chlorine is 17. So, in order to attain stability Mg donates its valence electrons to chlorine atoms which will form an ionic compound $MgCl_{2}$ .

Thus, we can conclude that out of the given options compounds are classified as follows.

Ionic compound - $MgCl_{2}$ and $Na_{2}S$

Covalent compound - $H_{2}O$ and $H_{2}S$

k0ka [10]3 years ago

4 0

MgCl2 is ionic because it is a positive metal bonding with a negative nonmetal. Na2S is ionic for the same reason. H2O and H2S are both covalent because they are two nonmetals bonded together.

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In the chemical reaction:

velikii [3]

Taking into account the reaction stoichiometry and definition of limiting reactant, AgNO₃ will be the limiting reagent.

<h3>Reaction stoichiometry</h3>

In first place, the balanced reaction is:

Cu + 2 AgNO₃ → 2 Ag + Cu(NO₃)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Cu: 1 mole
AgNO₃: 2 moles
Ag: 2 moles
Cu(NO₃)₂: 1 mole

<h3>Limiting reagent</h3>

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

<h3>Limiting reagent in this case</h3>

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 1 mole of Cu reacts with 2 moles of AgNO₃, 1.8 moles of Cu reacts with how many moles of AgNO₃?

$amount of moles of AgNO_{3} =\frac{1.8 moles of Cux2 moles of AgNO_{3} }{1 mole of Cu}$

<u><em>amount of moles of AgNO₃= 3.6 moles</em></u>

But 3.6 moles of AgNO₃ are not available, 2 moles are available. Since you have less moles than you need to react with 1.8 moles of Cu, AgNO₃ will be the limiting reagent.

<h3>Summary</h3>

In summary, AgNO₃ will be the limiting reagent.

Learn more about the reaction stoichiometry:

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8 0

2 years ago

PLEASE PLEASE HELP ME!! I WILL BRAINLIST YOU!! A 28.0 g sample of N2 is in a rigid 4.50 L container at 32 °C. Calculate the pres

chubhunter [2.5K]

Answer:

P=4184.36 torr

Explanation:

For this problem we can use the idea gas law,

$PV=nRT$

where P is pressure, V is volume, n is moles of substance, R is the constant, and T is temperature, We will need to manipulate it and a couple values so that we can get our answer in torr. To do this, let's rearrange the equation to solve for P.

$P=\frac{nRT}{V}$

Next, let's convert T (32) to kelvin. To do this, add 273 to the value.

$32+273=305$

Next, let's convert 28g of N2 to moles of N2. To do this, divide 28 by the molar mass of N2 (28.02)

$\frac{28.0}{28.01} \\=.99$ moles of N2

Next, we need to find out what value of R we need to use. Because you want your answer in torr, we will need to use the value of

$R=62.36\frac{torr}{mol*K}$

Now that we have all of our values, let's plug them into the equation (I'll be excluding units for simplicity but they cancel out to leave units of torr in the answer)

$P=\frac{(.99)(62.36)(305)}{4.50}\\P=4184.36$

P=4184.36 torr

<em>Very briefly</em>, I don't know what your periodic table looks like, but mine has nitrogen's molar mass as 14.01. If you have a different mass of nitrogen, this pretty drastically impacts the value. For example, if your nitrogen's molar mass was rounded to 14.0 (making N2 28g) then it would be one mole instead of .99 moles, raising the answer to 4228.70 torr. If you have any different values just plug them in in their proper spots. A similar concept applies to the Kelvin conversion.

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3 years ago

Which of the following UV rays has the highest energy that damages your skin the most?

Sergio [31]

The answer is b) UVB

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2 years ago

Explain why chlorine gas is used in water treatment instead of fluorine gas

Gekata [30.6K]

when Cl2 is dissolved in water it generates ClO which is a good oxidizing agent since it gives out atomic oxygen. but dissolution of F2 cannot generate atomic oxygen since F is more electronegative than O

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How do Earth's lithosphere,hydrosphere,and atmosphere compare?

Oduvanchick [21]

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4 years ago

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