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3 years ago

How can bonding determine the properties of a substance?

Chemistry

1 answer:

miskamm [114]3 years ago

4 0

Answer:

Explanation:

Chemical bonds are the forces that held the atoms in a molecules together. The strength of the bonds determine the some physical properties of material for example their hardness, solubility, boiling point, melting point etc. The stronger the bond , stronger will be the forces between them and it make difficult to separate the atoms.

There are three common type of bonding between atoms.

Ionic bonding

Covalent bonding

Metallic bonding

Ionic bonds are formed by complete transfer of electronic from one to another atoms. The compound having ionic bonds generally have moderate to high boiling points and melting point because of greater electrostatic interaction. Their electrical conductivity are high and these minerals tend to dissolve in water.

Covalent bonds are formed as a result of sharing of electrons between atoms. These compounds are insoluble , hard, having low melting and boiling points and have low conductivity.

The metallic bond is formed when metals are present. Due to loosely bound electrons of metals, electrons are shared with the other atoms. This is a type of covalent bond but it is not a true covalent bond. Th mobile electrons import great electrical conductivity in material. As this is a weak bond so these materials have low melting and boiling points.

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The decomposition of 3.32 g CaCO3 yields 1.24 g CaO. What is the percent yield of this reaction? (CaCO3 --> CaO + CO2)

alex41 [277]

Answer:

66.57%

Explanation:

The decomposition reaction of calcium carbonate is shown below as:

$CaCO_3\rightarrow CaO+CO_2$

Calculation of moles of $CaCO_3$ :

Amount = 3.32 g

Molar mass of $CaCO_3$ = 100 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus, moles are:

$moles= \frac{3.32\ g}{100\ g/mol}$

$moles= 0.0332\ mol$

According to reaction,

0.0332 moles of $CaCO_3$ decomposes to yield 0.0332 moles of $CaO$

Theoretical yield = 0.0332 moles

Calculation of moles of $CaO$ formed as:

Amount = 1.24 g

Molar mass of $CaO$ = 56 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus, moles are:

$moles= \frac{1.24\ g}{56\ g/mol}$

$moles= 0.0221\ mol$

Experimental yield = 0.0221 moles

$Yield\%=\frac {Experimental yield}{Theoretical yield}\times 100$

Thus,

$Yield\%=\frac {0.0221}{0.0332}\times 100$

<u>Percent yield = 66.57%</u>

5 0

4 years ago

A galvanic (voltaic) cell consists of an electrode composed of nickel in a 1.0 M 1.0 M nickel(II) ion solution and another elect

Katarina [22]

Answer:

<h3>So the standard electrode potential of the cell is 1.05 V</h3>

Explanation:

electrode composed of nickel in a 1.0 M

1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M 1.0 M silver ion solution,

connected by a salt bridge. Calculate the standard potential for this cell at 25 °C .

2Ag+ + Ni -----> 2 Ag + Ni +2

Eocell = Eo cathode - Eo anode

= Eo Ag+/Ag - Eo Ni+2/Ni

=0.80 - (-0.25)

=0.80 + 0.25

= 1.05

<h3>So the standard electrode potential of the cell is 1.05 V</h3>

3 0

3 years ago

A molecule forms when

Levart [38]

I think answer should be c. Please give me brainlest let me know if it’s correct or not okay thanks

4 0

3 years ago

I need help with #2. I don't know what law to use for problem.

bagirrra123 [75]

This uses something called the combined gas law. The combined gas law is as follows: (P1*V1/T1) = (P2*V2/T2)
According to question 2, you are given the following values initially:
P1 = 680 mm Hg * (1 atm/760 mm Hg) = 0.895 atm
V1 = 20.0 L
T1 = 293 K
STP or standard temperature and pressure implies that the other values we know are:
P2 = 1 atm
T2 = 273 K
Our unknown is V2
If we plug in our known values into the combined gas law:
(P1*V1/T1) = (P2*V2/T2)
(0.895 atm * 20.0 L)/293K = (1 atm * X liters)/273 K
0.0611 L*atm/K = (1 atm * X liters)/273 K
16.7 L = X liters
Therefore, the volume occupied at STP is 16.7 liters
This makes sense because the gas would occupy a smaller volume at a lower temperature, since the gas would have a lower average kinetic energy.

4 0

3 years ago

A diner adds sugar into their coffee until the sugar starts to precipitate. If they then add more coffee to their drink, what ty

PtichkaEL [24]

Answer:

unsaturated solution

Explanation:

This solution is made by the coffee, which is the solvent and the sugar, which is the solute. The solute dissolves in the solvent.

Sugar starts to precipitate because it cannot dissolve anymore. This means that the solution at the equilibrium point and is saturated. Since more coffee or solvent is added, the solution will now be able to dissolve more sugar. This means that the solution is unsaturated

5 0

3 years ago