bonding in metallic solids
-metallic solids have metal atoms in face-centered or body-centered arrangements
-coordination number for each atom is either 8 or 12
-problem: the bonding is too strong for London Dispersion forces and there are not enough electrons for covalent bonds
-resolution: the metal nuclei float in a sea of electrons
-metals conduct because the electrons are delocalized and are mobile
Answers
Strong bonds between the atoms are shown by the high melting and boiling temperatures of metals.
The coordination number for each atom is either eight or twelve, and metallic solids contain metal atoms arranged in face-centered or body-centered patterns. The difficulty is that the bonding is too strong for London Dispersion forces, in addition to the fact that there are insufficient electrons to form covalent bonds. The problem is solved by the fact that the nuclei of the metals float in a sea of electrons. Metals transmit electricity because the electrons are mobile and delocalized.
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Related Questions
Nitrogen monoxide is produced by combustion in an automobile engine. For the following reaction, 4.36 grams of nitrogen monoxide are mixed with excess oxygen gas . The reaction yields 5.46 grams of nitrogen dioxide . nitrogen monoxide ( g ) oxygen ( g ) nitrogen dioxide ( g ) What is the theoretical yield of nitrogen dioxide
Answers
Answer:
\(6.68~g~NO_2\)
Explanation:
We have to start with the combustion reaction:
\(NO~+~O_2~->~NO_2\)
Then we can balance the reaction:
\(2NO~+~O_2~->~2NO_2\)
If we want to find the theoretical yield, we have to calculate the amount of \(NO_2\). To do this, we have to first convert the 4.36 g of \(NO\) to moles \(NO\) (using the molar mass 30 g/mol), then we have to convert from moles of \(NO\) to moles of \(NO_2\) (using the molar ratio) finally, we have to convert from moles of \(NO_2\) to grams of \(NO_2\) (using the molas mass 46 g/mol), so:
\(4.36~g~NO\frac{1~mol~NO}{4.36~g~NO}\frac{2~mol~NO_2}{2~mol~NO}\frac{46~g~NO_2}{1~mol~NO_2}=6.68~g~NO_2\)
I hope it helps!
Under perfect conditions, which of these statements would you expect to be true about the magnitude of the potential (E"cell) for the CulMg voltaic cells in Part A when compared to the reduction potential for the Cu electrode? It may be helpful to refer to Appendix E of your lab manual The cell potential should be less than zero The cell potential should be greater than zero but less than the reduction potential for Cu The cell potential should be greater than the reduction potential for Cu The cell potential should be zero
Answers
The cell potential should be greater than the reduction potential for Cu.
It is given that,
The cell potential should be zero.
Because here we are considering the Cu-Cu cell so there would not be any potential difference and hence 0 E° cell value.
As we know that the reduction potential of copper is 0.34 V and the reduction potential of Mg is -2.37V
If we calculate the E°cell then,
E°cell= E(cathode)- E(anode)
Here copper is acting as the cathode and Mg as the anode
So, E°cell= 2.71V
So, the cell potential should be greater than the reduction potential for Cu.
Hence, option (c) is the correct choice.
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It takes 4 pounds of steel to make a small robot. You have 48 ounces. Do you have enough? If not what do you need?
Answers
No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.
What is pound and ounces?Pound is a unit for measuring weight. 16 ounces makes one pound.
Ounce is also a unit for measuring weight. 16 ounces is equal to 1 pound
So, for making one small robot we need 4 pounds.
1 pound = 16 ounces
4 pounds = 64 ounces
But, we have 48 ounces
We need more = 64 - 48 = 16 ounces or 1 pound
No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.
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Match each type of rock with the way it is formed.
pressure and heat
cooling magma
erosion and deposition
cooling lava
intrusive igneous rock
arrowRight
extrusive igneous rock
arrowRight
sedimentary rock
arrowRight
metamorphic rock
Answers
The correct match is as follows:
Pressure and heat - Metamorphic rock
Cooling magma - The Intrusive igneous rock
Cooling lava - The Extrusive igneous rock
Erosion and Deposition - Sedimentary rock
This is because Metamorphic rocks are formed as a result of past existing rocks changing form. If the igneous and sedimentary rocks are exposed to high temperature and pressure, they then become metamorphic rocks.
Intrusive igneous rocks form when magma cools slowly. This process soon results in the formation of large-crystal like structures. Whereas, when exposed to the atmosphere lava cools rather quickly. This faster cooling process forms extrusive igneous rocks. The fast cooling lava creates smaller crystals and a smoother surface.
The sediments that are formed as a result of weathered rocks are usually deposited on the surface of Earth, or at the bottom of rivers and oceans. Over time, sediments collect and form layers over the most recent layer. This leads to the formation of sedimentary rocks.
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Answer:
I believe this is your answer, or wait I know this is your answer
Explanation:
Given the reaction: Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
The reaction occurs more rapidly when a 10-gram sample of Mg is powdered rather than in one piece, because powdered
Mg has
1. less surface area
2. more surface area
3. a lower potential energy
4. a higher potential energy
Answers
A 0.732 m^3 sample of a gas originally at 122 C must be reduced to a volume of 0.500 m^3 at constant pressure. To what temperature must the sample be adjusted?
Answers
The sample must be adjusted to a temperature of approximately 412 K to reach a volume of 0.500 m^3 at constant pressure.
Combined gas lawTo solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas:
P1V1/T1 = P2V2/T2
Where:
P1 = initial pressure (constant pressure in this case)
V1 = initial volume
T1 = initial temperature
P2 = final pressure (constant pressure in this case)
V2 = final volume
T2 = final temperature (what we want to find)
We can rearrange this equation to solve for T2:
T2 = (P2/P1) * (V1/V2) * T1
Plugging in the given values, we get:
T2 = (1/1) * (0.732/0.500) * (122 + 273.15) K
Note that we add 273.15 to convert from Celsius to Kelvin.
Simplifying, we get:
T2 = 411.99 K
Rounding to the nearest degree, we get:
T2 ≈ 412 K
Therefore, the sample must be adjusted to a temperature of approximately 412 K to reach a volume of 0.500 m^3 at constant pressure.
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Stephan’s mother cuts a twig from a rose bush and plants it in the soil. After a few days, Stephan observes a new plant growing. Which characteristic does the growth of the new plant depict?
Answers
The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.
Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.
The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.
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2.
Which mixture could be a useful buffer in a solution?
acetic acid (CH3CO2H) and hydrochloric acid (HCl)
sodium hydroxide (NaOH) and elemental sodium (Na)
ammonia (NH3) and ammonium chloride (NH4Cl)
acetic acid (CH3CO2H) and ammonia (NH3)
Pls answer quickly
Answers
Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C
A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.
In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.
Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.
Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.
Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).
The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.
Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.
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A fossil is 3 half-life old. Measured Uranium-235 has half-life of 704 million years. How many years old is this fossil?
Answers
Answer: Uranium is not a problem in this case, as its radioactivity is very low. This is due to the long half-life. How much uranium will decay per second with a half-life of 700 million years? This is a very insignificant figure.
2HCI + Na₂CO3 → H₂O + CO₂ + 2NaCl
He mixes exactly 235.0 mL of 0.600 M HCI
with 7.472 g Na2CO3.
8.24 g NaCl form. What is the molar
concentration of the salt in the solution?
A. 4.29 x 10-4 M
B. 0.600 M
C. 0.429 M
D. 3.00 x 10 4M
Answers
The molar concentration of the salt is 0.600 M. Option B
What is the molar concentration of the salt?We know that the term molar concentration has to do with the number of moles of the salt that is present in one liter of the solution. We have been given the mass of the salt that is formed, we need to obtain the number of moles of the salt that has been formed and use the volume of the solution that have been given in the question to find the molar concentration of the salt.
Mass of the salt = 8.24 g
Molar mass of the salt = 58.5 g/mol
Number of moles of the salt = mass/molar mass
= 8.24 g/ 58.5 g/mol
= 0.14 moles
Volume of the solution = 235.0 mL or 0.235 L
Molar concentration = 0.14 moles/ 0.235 L
= 0.595 M or 0.600 M
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9. When 1.10 g of magnesium reacted with unlimited amount of HCl, the products were
hydrogen gas and magnesium chloride. What volume of hydrogen gas would be collected
if the reaction had been run at STP?
Answers
As per the balanced equation of the reaction one mole of Mg give s one mole of H2. 1.10 g of magnesium is 0.045 moles. Thus it gives 0.045 moles of H2 which is 1.02 litres.
What is magnesium chloride?Magnesium chloride is an ionic compound formed by the reaction of magnesium metal with two moles of hydrochloric acid. The reaction also produce one mole hydrogen gas.
The atomic mass of magnesium is 24 g/mol. Thus number of moles in 1.10 g is 1.10/24 = 0.045 moles.
As per the reaction equation one mole of magnesium gives one mole of hydrogen gas. Thus 0.045 moles of magnesium gives 0.045 moles of hydrogen gas.
At STP, the volume of one mole of any gas will be equal to 22.4 L. Thus volume of 0.045 moles of hydrogen at STP is:
volume = 0.045 × 22.4
=1.02 L.
Hence, the volume of hydrogen produce here is 1.02 L.
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Which is a substance that could be found in air , water , or soil that is harmful to humans or animals?
Answers
Answer: Pollutant
Explanation:
Answer:
Explanation:
The substance that could be found in air, water or soil that is harmful to humans or animals is called pollutant.
Convert to moles 12.06 x 10^22 molecules
Answers
Answer:
0.2 mole
Explanation:
From the question given above, the following data were obtained:
Number of molecules = 12.06×10²²
Number of mole =?
From Avogadro's hypothesis,
6.02×10²³ molecules = 1 mole
Therefore,
12.06×10²² molecules = 12.06×10²² / 6.02×10²³
12.06×10²² molecules = 0.2 mole
Thus, 12.06×10²² molecules is equivalent to 0.2 mole
write the structural formula for 2-bromo-3-chloro-4,4-dimethylpentanal
Answers
Answer:
Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO
Explanation:
The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.
The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.
The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.
The methyl groups are non-polar and do not have any significant reactivity.
The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.
The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.
Read the statement about Mount Vesuvius. Mount Vesuvius erupted in 79 CE and destroyed the ancient city of Pompeii. Why is the statement free of bias? It is based on opinion. It is a fair statement of fact. It expresses one specific view. It exaggerates details of the event. Explain good or ill report
Answers
Answer:
It is a fair statement of fact
Explanation:
The statement is a fact that is unopinionated and it does not exaggerate details of the event it just states the fact without opinions or exagerrations. This is why its unbiased.
The statement that is given is free of bias because It is a fair statement of fact. The correct option is B.
What is a statement?A statement is affirmative that is proposed and based on facts or the condition of the situation. It is a declaration. Statements don't pose queries, issue requests, or issue directives. They are not exclamations, either.
Scientific statements are generally based on facts and true results that came from an experiment. Like the one here, about Mount Vesuvius.
The statement simply tells the truth without opinions or exaggerations; it is a fact that is opinionated but does not embellish the specifics of the occurrence. This is why it is objective.
Thus, the correct option is B. It is a fair statement of fact.
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PLZ HELP I NEED THIS RN!
when the balls reach the bottom of the ramp, which statement will describe their energy?
A. they will have no kinetic energy
B. they will have 100% potential energy
C. they will have 100% kinetic energy
C. they will have different amounts of potential energy
Answers
Answer:
they will have 100% kinetic energy
Explanation:
all the potential energy has been used when it is at the bottom of the ramp
Which amphibian organ has a high blood supply and many folds to increase surface area?
a. heart
b. stomach
c. lungs
d. brain
Answers
Answer:
lungs
Explanation:
MAKE NOTES ON METHOD OF MIXTURES ELECTRICAL METHOD.
Answers
The Method of Mixtures Electrical Method is a method used to determine the electrical conductivity of a material.
What is Electrical Method?The Electrical Method is a geophysical prospecting technique that uses electrical resistivity to map subsurface features, such as geological structures, fractures, and mineral deposits.
It involves measuring the amount of current that passes through a mixture of two materials under the application of a known voltage. The electrical conductivity of each material can then be determined by calculating the ratio of the current to the applied voltage. The electrical conductivity obtained from the Method of Mixtures Electrical Method can be used to characterize materials such as semiconductors and insulators.
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Part D Question Now that you have observed the internal parts of the flower, write the names of the structures in the diagram. If necessary, do some more research online. Lines Shapes Fill:▼ Line:▼ Width:
Answers
The following internal parts of the flower:-
Stigma - the head of the pistil. The stigma receives pollen, with a view to start the process of fertilization.
Style - this is the name for the stalk of the pistil.
Ovary - the bottom of the pistil.
Ovules - these are the flower's eggs, located inside the ovary.
Anther- carries pollen sacs, wherein pollen grains are shaped. Pollen consists of the male cells.
Filament- supports the anther.In female parts of the flower is pistil = Stigma + Style + Ovary
In male parts of the flower is stamen = anther + filament
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What is the density of a sponge that has a mass of 100g and a volume of 10 mL?
Answers
Answer:
10
Explanation:
Equation: d = m/v
100/10 = 10
10g/ml
Explanation:
Density is the mass an object per unit of volume
there are three sets of sketches below, showing the same pure molecular compound (carbon monoxide, molecular formula ) at three different temperatures. the sketches are drawn as if a sample of carbon monoxide were under a microscope so powerful that individual atoms could be seen. only one sketch in each set is correct. use the slider to choose the correct sketch in each set. you may need the following information
Answers
The gaseous molecules are only present in Sketch A in the proper form/state as predicted by the temperature!
Based on the original supposition that all processes or CO states exist at normal atmospheric pressure and temperature circumstances! Sketch A is at -174°C, Sketch B is at -211°C, and Sketch C is at -200°C in the graphic accompanying this solution. However, CO has a boiling point of -192°C, which means that at this temperature, CO molecules transition from a liquid state in which they are largely free to move around and are practically incompressible to a gaseous state in which they are completely free to move around.
Its melting point is -205°C, which is the point at which CO molecules transition from their ordered solid state, in which movement is entirely limited to vibrations, to their more free-flowing liquid state.
According to this interpretation, CO molecules exist as an ordered solid at temperatures lower than -205°C. CO molecules exist as a reasonably free liquid between -205°C and -192°C, and at temperatures above -192°C, they exist as a gas that is completely free to move around. Sketch A of the drawings included with this solution clearly depicts carbon monoxide molecules in their very liberating gaseous state. CO molecules are depicted in Sketch B in an extremely ordered solid state. Sketch C, however, depicts CO molecules in their somewhat unrestricted form (that is, liquid form).
The CO molecules are only present in drawing A in the predicted form and state for the temperature!
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The CO molecule has two atoms: C and O. Atoms C and O. One oxygen atom and one carbon atom make up carbon monoxide, which is further joined by a triple link made up of two covalent bonds and one dative covalent bond. Carbon monoxide's chemical name is represented as CO.
The most typical signs of CO poisoning include headache, dizziness, weakness, nausea, upset stomach, and confusion. CO symptoms are frequently referred to as "flu-like." If you inhale a lot of CO, you risk losing consciousness or perhaps dying. Headaches, tiredness, and nausea are the most common side effects of modest carbon monoxide exposure. Sadly, because they frequently resemble the flu, the symptoms are readily missed. You may have a pounding headache, tiredness, disorientation, and an increased heart rate as a result of medium exposure. The signs of exposure to low amounts of carbon monoxide may resemble those of the flu and food poisoning. Carbon monoxide poisoning, however, does not result in a high temperature, unlike the flu (fever).
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Calculate the number of hydrogen atoms in 42.7 g of a compound that contains
91.25% carbon and 8.75% hydrogen.
Answers
A substance with a carbon content of 91.25% and a hydrogen content of 8.75% has 91.45491/6. 023 x 1023 hydrogen atoms in 42.7 g.
The amount of hydrogen atoms in a molecule can be determined in what way?Divide the mass of ethanol by its molar mass to obtain moles of ethanol, which may then be used to calculate the amount of hydrogen atoms. The amount of hydrogen atoms may be calculated by multiplying this by the six hydrogen atoms that are included in each ethanol molecule as well as Avogadro's number.
If an element or compound's mass is known, one can calculate the number of moles present by dividing the provided mass by the compound's molar mass. N A, or 6. 023 x 1023 atoms, make up 1 mole of a material. To determine how many atoms are present, multiply the supplied moles by N A.
42.7/91.25 + 8.75 = 91.45491/ 6. 023 x 1023 .
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ILL GIVE BRAINLY PLEASE HELP!!! What type of transport across the cell (plasma) membrane requires energy?
active transport
bilayer
passive transport
concentration gradient
Answers
Active transport requires energy to transport the molecules across the cell membrane. Thus, Option A is correct.
Active transport is the transport of molecules from a lower concentration to a higher concentration across the cell (plasma) membrane. As this process is against the concentration gradient, it requires cellular energy to transport the molecules or ions. Active transport involves Primary active transport and secondary active transport.
Passive transport involves the movement of molecules from a higher to lower concentration gradient and thus does not require energy and is slower than active transport.
Therefore, only active transport requires energy for the transportation of molecules across the cell membrane.
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5) Calculate the number of grams of solute that has to be used to make the following solution:152.9 mL of 0.452 M NaNO3
Answers
The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, divide the moles of solute by the volume of the solution expressed in liters:
\(\text{Molarity (M)=}\frac{mole\text{s of solute}}{litres\text{ of solution}}=\frac{moles}{L}.\)We have to convert 152.9 mL to liters (L). Remember that 1 liter equals 1000 mL:
\(152.9mL\cdot\frac{1L}{1000mL}=0.1529\text{ L.}\)And we have to solve for 'moles' from the formula of molarity:
\(\text{moles = Molarity }\cdot\text{ L.}\)And finally, we replace the given molarity (0.452 M) and the volume of solution which is 0.1529 L:
\(\begin{gathered} \text{moles = 0.452 M}\cdot0.1529L, \\ \text{moles}=0.0691\text{ moles.} \end{gathered}\)Now, that we have the number of moles of NaNO3, we have to calculate its mass in grams. We have to use the molar mass of NaNO3 which is 85 g/mol (you can calculate the molar mass using the periodic table). The conversion from 0.0691 moles of NaNO3 to grams would be:
\(0.0691molesNaNO_3\cdot\frac{85\text{ g }NaNO_3}{1\text{ mol }NaNO_3}=5.87\text{ g }NaNO_3.\)The answer is that we have 5.87 grams of NaNO3 in 152.9 mL of 0.452 M of NaNO3.
What is a neutralization reaction? Use an example to describe the components of a neutralization reaction. It can be just 3 sentences.
Answers
Explanation:
A Neutralization reaction is a reaction between an acid and a base that produces water and slt.
e.g.
how many grams of p2o3 can be produced from 95l o2 at STP
Answers
Explanation:
Balanced Equation
P
2
O
3
+
3H
2
O
→
2H
3
PO
3
First use the balanced equation to determine the mole ratio between
H
3
PO
3
and
P
2
O
3
. This ratio will be used to determine the moles
P
2
O
3
required to produce
10.2
moles
H
3
PO
3
.
Mole Ratio Between
P
2
O
3
and
H
3
PO
3
from the balanced equation.
1
mol P
2
O
3
2
mol H
3
PO
3
and
2
mol H
3
PO
3
1
mol P
2
O
3
Multiply the moles
H
3
PO
3
by the molar mass that cancels
H
3
PO
3
and leaves
P
2
O
3
10.2
mol H
3
PO
3
×
1
mol P
2
O
3
2
mol H
3
PO
3
=
5.10 mol P
2
O
3
Now that the moles
P
2
O
3
required to produce
10.2 mol H
3
PO
3
are known, multiply the number of moles by its molar mass,
109.945 g/mol
. https://www.ncbi.nlm.nih.gov/pccompound?term=P2O3 This will give the mass in grams needed for
P
2
O
3
to produce
10.2 mol H
3
PO
3
.
5.10
mol P
2
O
3
×
109.945
g P
2
O
3
1
mol P
2
O
3
=
561 g P
2
O
3
rounded to three significant figures
Please Help Me with this
Answers
Answer:
compared to sodium, silicon has a higher ionization energy meaning it takes more energy to remove electrons.
Explanation:
hope this helps
can u please give me and Brainlist
Na Sa Bant HCL -> 50g Hao pt Soy
Answers
North America and south africa
what geological forces might be responsible for the range of mountains
Answers
Answer:
Mountains are built by tectonic processes that cause portions of the Earth's crust to rise. These processes are fueled by the escape of heat from the interior of the Earth, causing crustal uplift by volcanic activity and by movement along faults that, in turn, is responsible for the formation of mountains.
Explanation:
Guysss how to explain nuclear chemistry? And define nuclear chemistry ?
Answers
Answer:
How do amoeba respire.
Define Diffusion.