in a gas thermometer, a small sample of gas is trapped inside a capillary tube. this gas occupies a volume of .2 ml at 0 c. the thermometer is then placed in a liquid, and the final volume of the gas is .3 ml. what is the temperature of the liquid if the pressure remains constant?
Answers
In a gas thermometer, the relationship between temperature and volume is described by Charles's Law. In this case, with an initial volume of 0.2 ml and a final volume of 0.3 ml, the temperature of the liquid is approximately 409.73 K.
Given:
Initial volume of the gas (V1) = 0.2 ml
Final volume of the gas (V2) = 0.3 ml
According to Charles's Law:
V1 / T1 = V2 / T2
Rearranging the equation and substituting the given values:
T2 = (V2 * T1) / V1
T1 is the initial temperature of the gas, which is 0°C. We can convert it to Kelvin by adding 273.15:
T1 = 0°C + 273.15 = 273.15 K
Substituting the values into the equation:
T2 = (0.3 ml * 273.15 K) / 0.2 ml
T2 ≈ 409.73 K
Therefore, the temperature of the liquid is approximately 409.73.
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Related Questions
what type of ions are the atoms Mg and Na expected to be? why?
Answers
Answer:
its C
Explanation:
just took the quiz
0.34 moles of calcium chloride is dissolved to make 2.5 liters of solution
Answers
Which solution is the least concentrated?
O 2
What is considered a pure substance?
Answers
Answer:
A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.
Explanation:
Compound: A substance that contains more than one element
pure substance: is made up of one substance made up of only one type of molecule
What is the main form of energy represented by each of the following?
Oxygen bonds with carbon
1) chemical energy
2)potential energy
3)kinetic energy
4)thermal energy
Answers
Answer:
chemical energy is your correct answer mark me brainly
Which conversion factor below would you use to complete this conversion?
How many liters of bromine gas would 12.3 moles occupy at Standard Temperature and Pressure?
a.) 1 mole/22.4 L
b.) 22.4 mol/1 liter
c.) 22.4 L/1 mole
d.) 1 liter/22.4 mol
Answers
Answer:
c.) 22.4 L/1 mole
Explanation:
Using the general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
The standard values for a gas are as follows:
Standard pressure of a gas = 1 atm
Standard temperature of a gas = 273K
According to the information in the question, n = 12.3 moles
Using PV = nRT
V = nRT/P
V = 12.3 × 0.0821 × 273/1
V = 275.68 L
Based on this value of volume in liters for 12.3moles of Br gas, the volume per mole at standard temperature and pressure will be 275.68/12.3 = 22.4 Litres per mole. Hence, the answer is 22.4 L/1 mole.
Which of these discoveries contradict components of Dalton’s atomic theory? Check all of the boxes that apply.
Atoms contain smaller particles: protons, neutrons, and electrons.
Atoms of a given element can bond to other atoms only in specific ways.
Atoms of a given element can have different numbers of neutrons.
Nuclear reactions can change an atom of one element into an atom of another element.
All atoms of a given element have the same number of protons.
Answers
Dalton's Atomic theory was Atom is an indivisible fundamental particle but Bohrs theory contradict it,
Atoms contain smaller particles: protons, neutrons, and electrons.
what is the term for the circular movement of material inside earths mantle
Answers
so… the answer is convection currents!
hope this helps you!!
Use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. %
Answers
Using this formula, we can calculate the confidence interval once we have the sample data, without the sample data, it is not possible to provide an accurate confidence interval estimate.
To construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system, we would need the sample data, specifically the number of cell phone users and the number of users who developed cancer. Without the sample data, it is not possible to provide an accurate confidence interval estimate.
However, if we assume that we have the necessary sample data, we can proceed with the calculation. The formula for calculating a confidence interval for a proportion is:
Confidence interval
\(=�^±�×�^(1−�^)�Confidence interval= p^ ±z× np^ (1− p^ ) where:�^p^\)
is the sample proportion (number of users with cancer divided by the total number of cell phone users).
\(�\)
z is the z-score corresponding to the desired confidence level (90% confidence level corresponds to a z-score of approximately 1.645).
\(�\)
n is the sample size (total number of cell phone users).
Using this formula, we can calculate the confidence interval once we have the sample data.
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Which could cause topsoil to be lost?
wind and water erosion
lack of use
compaction
desertification
Answers
Wind and Erosion lead to Washing away of top soil.
What Is Erosion?Erosion is the process that lead to the washing away of top soil leading to loss of nutrient, holes and many more.
The agents of erosion include wind, water and so on.
Strong wind will lead to the top soil to be remove when it is blowing. Water also when is is flowing turbulently maybe when rain fall can lead to loss of top soil.
Therefore, Wind and Erosion lead to Washing away of top soil.
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Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two metals?
Answers
Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove. Option D
What is the periodic table?The periodic table has to do with an arrangement of the elements in their order of reactivity. We know that the periodic table is arranged in groups and periods. The groups are the vertical portions while the periods are the horizontal portions.
Given that the reactivity would depend on the position of an element in the periodic table, we would look at where the elements that are to be considered are found in the periodic table.
We know that the elements that occur down the group for the metals are more reactive because they are more shielded thus they leave the attractive force of the nucleus much more easily.
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Missing parts;
Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two different metals? Barium (Ba) is less reactive than calcium (Ca) because the valence electrons in calcium atoms are farther from the nuclei and harder to remove. Strontium (Sr) is more reactive than magnesium (Mg) because the valence electrons in strontium atoms are farther from the nuclei and harder to remove. Rubidium (Rb) is more reactive than sodium (Na) because the valence electrons in sodium atoms are closer to the nuclei and easier to remove. Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove.
What is the molar mass of NaCrO4?
Answers
Answer:
Molar Mass: 138.9818 g/mol
Explanation:
Explain the impact the volcano has on the country of sicily and
surrounding areas?
Answers
Answer:
Dust, ashes, lava, no photosynthesis, land of death
Explanation:
PLEASE HELP ME (JOULES)
Type the correct answer in the box. Round your answer to the nearest whole number.
Dina has a mass of 50 kilograms and is waiting at the top of a ski slope that’s 5 meters high.
The maximum kinetic energy she can reach when she skis to the bottom of the slope is
joules.
Use PE = m × g × h and g = 9.8 m/s2. Ignore air resistance and friction.
Answers
Answer:
2450 joules
Explanation:
The formula for potential energy is PE = m x g x h
m is the mass, in kg (50)
g is the acceleration due to gravity, in meters per second squared (9.8)
h is the height, in meters (5)
The problem gives m = 50, g = 9.8, and h = 5. Plug that into the formula and get the answer.
\(PE = mgh\\PE = (50) (9.8) (5)\\PE = 2450\)
According to law of conservation of energy and substitution of values in formula gives,2540 joules as maximum kinetic energy.
What is law of conservation of energy?According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.Substitution in formula gives , PE=50×9.8×5=2540 J.
Thus, the maximum kinetic energy she can reach when she skis to the bottom of the slope is 2540 J.
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What happens when there is an increase in temperature for a reaction rate? Select all that apply.
Answers
ANSWER
option A and B
EXPLANATION
An increase in temperature will increase the average kinetic energy of the molecule, thereby increasing the frequency of collision.
The correct answer are option A and B
Balance the chemical equations: 1) ___ N2O5 → ___ N2 + ___ O2 2) _____Fe + _____O2 → _____ Fe2O3 3) _____H2 + _____Cl2 → _____HCl
Answers
2) 4, 3, 2
3) 1, 1, 2
Answer:
2N2 + 5O2 => 2N2O5
4Fe + 3O2 => 2 Fe2O3
H2 + Cl2 => 2 HCl
when 0.538 g of sodium metal is added to an excess of hydrochloric acid, 5590 j of heat are produced. what is the enthalpy of the reaction as written?
Answers
Enthalpy of the reaction is 238.88 kJ/ mol.
What is the enthalpy of the reaction?
The change in enthalpy that takes place during a chemical reaction at constant pressure is known as the Heat of Reaction (also known as the Enthalpy of Reaction). It is a helpful thermodynamic unit of measurement for determining how much energy per mole is emitted or created during a reaction.
Given mass of sodium = 0.538 g
The reaction is,
Na(s)+HCl(aq)→NaCl(aq)+12H2+Δ(heat)
number of moles of sodium = given mass / molar mass
number of moles of sodium = 0.538 g / 22.99 g/mol
number of moles of sodium = 0.0234 mol
enthalpy of the reaction ΔH∘rxn = 5590J/ 0.0234 mol
enthalpy of the reaction ΔH∘rxn = 238.88 kJ/ mol
Hence, enthalpy of the reaction is 238.88 kJ/ mol
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An onion skin is measured to be 0.0620 millimeters thick. How many inches is this?
Answers
Answer:
0.00244
Explanation:
we have 25.4mm in one inch. Hence, 0.0620 divided by 25.4 to give us 0.00244 inches
The onion skin is really wonderful and it adds infusing flavor into soups, sauces and stock. The inches of onion skin of 0.0620 millimeters thick is 0.0024 inches.
Is onion skin good?The outer skins of onion and garlic provides enormous amount of vitamins like Vitamin A, C, E and plenty of antioxidants. The skin of onion is also a rich source of flavonoids. The onions are packed with sulfur which promotes the hair growth.
The skin of onion have both anti inflammatory and antioxidant properties which help to manage the symptoms like cold, flu and cough. The intake of onion peel is also helpful in reducing the weight of our body.
Here we have to convert 0.0620 millimeters into inches.
1 millimeter = 0.0394 inches
0.0620 millimeters = 0.0024 inches
Thus an onion skin which is measured to be 0.0620 millimeters thick is 0.0024 inches.
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A wave's frequency is 5.00x10^14 s-1.
What is the wavelength?
Answers
The wavelength of the wave having a frequency of 5.00×10¹⁴ s⁻¹ is 6×10⁻⁷ m
How do I determine the wavelength?We know that the velocity is related to wavelength and frequency according to the following formula:
Velocity (v) = wavelength (λ) × frequency (f)
v = λf
Thus, with the above formula, we can determine the wavelength. Details below:
Frequency (f) = 5.00×10¹⁴ s⁻¹Speed of wave (v) of = 3×10⁸ m/sWavelength (λ) = ?Velocity (v) = wavelength (λ) × frequency (f)
3×10⁸ = wavelength × 5.00×10¹⁴
Divide both sides by 5.00×10¹⁴
Wavelength = 3×10⁸ / 5.00×10¹⁴
Wavelength = 6×10⁻⁷ m
Therforee, the wavelength is 6×10⁻⁷ m
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Which of the following describes NaCl?
A)weak acid
B)weak electrolyte
C)strong acid
D)strong electrolyte
E)nonelectrolyte
Answers
Strong electrolyte
Sodium chloride(NaCl) is a strong electrolyte. If there is enough water, all the sodium chloride will dissociate into separated ions, leaving no undissolved solid. The solution will have the maximum number of ions available to conduct electricity. This is why we call sodium chloride a strong electrolyte.
The correct answer is D) Strong electrolyte.
Explanation:NaCl is a salt that dissolves in water to form Na+ and Cl- ions, which are highly conductive of electricity. Therefore, NaCl is a strong electrolyte.
To test the conductivity of NaCl solution, we can follow the steps below:
Set up a circuit with a battery, wires, and a bulb.Insert two electrodes, such as copper wires, into the solution of NaCl.Connect one electrode to the positive terminal of the battery and the other to the negative terminal.If NaCl is a strong electrolyte, the bulb will light up brightly, indicating that the solution is conducting electricity well.Hope this helps!
a 2.7 L of N2 is collected at 121kpa and 288 K . if the pressure increases to 202 kpa and the temperature rises to 303 K , what volume will the gas occupy?
Answers
Answer:
The gas will occupy a volume of 1.702 liters.
Explanation:
Let suppose that the gas behaves ideally. The equation of state for ideal gas is:
\(P\cdot V = n\cdot R_{u}\cdot T\) (1)
Where:
\(P\) - Pressure, measured in kilopascals.
\(V\) - Volume, measured in liters.
\(n\) - Molar quantity, measured in moles.
\(T\) - Temperature, measured in Kelvin.
\(R_{u}\) - Ideal gas constant, measured in kilopascal-liters per mole-Kelvin.
We can simplify the equation by constructing the following relationship:
\(\frac{P_{1}\cdot V_{1}}{T_{1}} = \frac{P_{2}\cdot V_{2}}{T_{2}}\) (2)
Where:
\(P_{1}\), \(P_{2}\) - Initial and final pressure, measured in kilopascals.
\(V_{1}\), \(V_{2}\) - Initial and final volume, measured in liters.
\(T_{1}\), \(T_{2}\) - Initial and final temperature, measured in Kelvin.
If we know that \(P_{1} = 121\,kPa\), \(P_{2} = 202\,kPa\), \(V_{1} = 2.7\,L\), \(T_{1} = 288\,K\) and \(T_{2} = 303\,K\), the final volume of the gas is:
\(V_{2} = \left(\frac{T_{2}}{T_{1}} \right)\cdot \left(\frac{P_{1}}{P_{2}} \right)\cdot V_{1}\)
\(V_{2} = 1.702\,L\)
The gas will occupy a volume of 1.702 liters.
which is the correct order of reactivity (most reactive to least reactive) toward electrophilic aromatic substitution?
Answers
The correct order of reactivity towards electrophilic aromatic substitution is:
b.) Phenol > benzene > chlorobenzene > benzoic acid
Phenol is more reactive than benzene towards electrophilic substitution reactions due to the presence of the -OH group (hydroxyl group) attached to the benzene ring. The lone pair of electrons on the oxygen atom in the -OH group can donate electron density to the ring, making it more nucleophilic and facilitating electrophilic attack.
Benzene, although less reactive than phenol, can still undergo electrophilic substitution reactions due to its aromaticity and delocalized electron system.
Chlorobenzene is less reactive than both phenol and benzene because the chlorine atom is an electron-withdrawing group. It withdraws electron density from the benzene ring, making it less nucleophilic and less prone to electrophilic substitution.
Benzoic acid is the least reactive among the options given. The carboxylic acid group (-COOH) is an even stronger electron-withdrawing group than the chlorine atom in chlorobenzene. It further reduces the electron density on the benzene ring, decreasing its reactivity towards electrophilic substitution.
Therefore, the correct order of reactivity towards electrophilic substitution is option b.
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the complete question is:
The correct order of reactivity towards electrophilic aromatic substitution is?
a.) Benzene > phenol > benzoic acid > chlorobenzene
b.) Phenol > benzene > chlorobenzene > benzoic acid
c.) Chlorobenzene > benzoic acid > phenol > benzene
d.) Benzoic acid > chlorobenzene > benzene > phenol
PLS HELP ME THIS IS DUE TODAY BRO ILL BRAINLIST U JUST DO THE ONES U KNOW WAJDHWNDIGB!
Answers
Answer: Helium: atomic number 2. EC 2
Neon: atomic number 10. EC 2,8
hydrogen: atomic number 1. EC 1
magnesium: atomic number 12. EC 2,8,2
chlorine: atomic number 17. EC 2,8,7
Aluminum: atomic number 13. EC 2,8,3
Explanation: hope this helped
a characteristic of the bence jones protein that is used to distinguish it from other urinary proteins is its solubility:
Answers
One characteristic of the Bence Jones protein that distinguishes it from other urinary proteins is its solubility. The Bence Jones protein is soluble in cold water but insoluble in warm water.
The Bence Jones protein is a type of protein that is produced by plasma cells in the bone marrow. It is a monoclonal immunoglobulin light chain, which means that it is made up of identical protein molecules. This Solubility property is due to the unique structure of the protein. The protein contains a specific sequence of amino acids that allows it to fold into a three-dimensional structure that is stable at low temperatures. However, when the temperature is raised, the protein becomes unstable and unfolds, causing it to become insoluble.
This solubility characteristic of the Bence Jones protein is important for its detection in the urine. When a urine sample is collected, it is first tested for the presence of protein using a dipstick or other test. If protein is detected, the next step is to determine the type of protein present. The solubility test is performed by adding a small amount of cold water to the urine sample. If the protein dissolves, it is not the Bence Jones protein. However, if the protein remains insoluble, it is likely to be the Bence Jones protein.
In summary, the solubility of the Bence Jones protein is an important characteristic that is used to distinguish it from other urinary proteins. Its unique solubility in cold water but insolubility in warm water allows for its detection in urine samples using a simple solubility test.
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Which of the following is considered parasitism?
a
A hummingbird pollinating a flower.
b
A flea is sucking the blood from a dog.
c
A spider builds its web in a tree.
d
A bug hitches a ride on your backpack during a hike.
Answers
What is the best listed approach for viewing spots that are not visible on a TLC plate a. Use a UV lamp Ob. View the TLC plate under a microscope. O c Estimate the location of the spots and mark with a pencil. Od. Dip the TLC plate in a colored liquid. QUESTION 15 what is the nature of aniline? O a, it is a weak acid O b. it is a weak base Oct is strong acid O d. it is strong base
Answers
The best listed approach for viewing spots that are not visible on a TLC plate is to view the TLC plate under a microscope. Option Ob is correct. And Nature of aniline is a weak base hence, option Ob is correct.
A thin layer chromatography (TLC) plate is a plate made of plastic or glass, covered with a thin layer of absorbent material, typically silica gel, aluminum oxide, or cellulose. The most widely used adsorbent is silica gel.
The best listed approach for viewing spots that are not visible on a TLC plate is to view the TLC plate under a microscope. The spots may not be visible to the unaided eye, but they can be seen using a UV lamp or under a microscope.
So, you can rule out the option O_d which suggests to dip the TLC plate in a colored liquid, as it will not help in viewing the spots. Estimating the location of the spots and marking them with a pencil can be helpful but may not be accurate.
Nature of Aniline: Aniline is a weak base.
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Osmium has a density of 22.6 g/cm3. what volume (in cm3) would be occupied by a 21.8 g sample of osmium?
Answers
The volume occupied by a 21.8 g sample of osmium having a density of 22.6 g/cm3 is 0.965cm3.
The density formula is:
Density = mass/volume
To find volume:
Volume = mass/density
Now
mass = 21.8 g
density= 22.6 g/cm3
Putting the values
Volume = 21.8/22.6
volume = 0.965cm3
Thus the volume is 0.965cm3.
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The volume occupied of the sample of osmium with a density of 22.6 g/cm³ and a mass of 21.8 g is: 0.9646 cm³
The density formula and the procedure we will use is:
d = m/v
Where:
v= volumed= densitym= massInformation about the problem:
d= 22.6 g/cm³m = 21.8 gv = ?Applying the density formula and clearing the volume we get:
d = m/v
v = m/ d
v = 21.8 g / 22.6 g/cm³
v = 0.9646 cm³
What is density?It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.
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how many moles of h2 are contained in a balloon that contains hydrogen and water vapor (wet gas), has a volume of 28.3 cm3 at 25.0oc and a total pressure of 1.001 atm? show your answer with 3 significant digits, without units, and don't use scientific notation.
Answers
The moles of H2 are contained in a balloon that contains hydrogen and water vapor, has a volume of 28.3 cm3 at 25.0oc and a total pressure of 1.001 atm is 7.28 moles.
What is pressure?Pressure is defined as the tension at a point inside a confined fluid, or the perpendicular force per unit area. The physical amount of force applied to a certain region is known as pressure.
Given
P = 1.001 atm
V = 28.3 cm³
T = 25 °C
R = 8.31 jK⁻¹mol⁻¹
PV = nRT
n = RT / PV
n = 8.31 x 25 / 1.001 x 28.3
n = 7.28 moles
Thus, the moles of H2 are contained in a balloon that contains hydrogen and water vapor, has a volume of 28.3 cm3 at 25.0oc and a total pressure of 1.001 atm is 7.28 moles.
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Which tool would a scientist use to hold, mix, and heat chemicals in an experiment?
1. Forceps
2. a hot plate
3. a test tube
4. a thermometer
Answers
Answer:
If it's multiple choice it's 2 and 3, if not I think the best answer is 2, but I'm not exactly sure.
explain how natural selecting leads to predominance and suppresion of traits in a population
This is actually science and when i say science, i mean as in like genetic mutation, DNA, etc, i just cant find the right subject.
Answers
Natural selection is a process in which organisms that are better adapted to their environment tend to survive and produce more offspring. These offspring are likely to inherit the traits that made their parents successful, which can lead to predominance and suppression of certain traits in a population.
Natural selection can lead to the predominance of certain traits in a population because organisms that possess advantageous traits are more likely to survive and reproduce, passing on those traits to their offspring. For example, if a population of birds lives in an environment where seeds are scarce, birds with larger beaks that are better suited for cracking open tough seeds are more likely to survive and reproduce. Over time, this can lead to a predominance of birds with large beaks in the population.Conversely, natural selection can also lead to the suppression of certain traits in a population. This occurs when organisms with certain traits are less likely to survive and reproduce, which means that those traits are less likely to be passed on to future generations. For example, if a population of moths lives in an environment where predators can easily spot them because of their light coloration, moths with darker coloration that are better camouflaged are more likely to survive and reproduce. Over time, this can lead to a suppression of the light coloration trait in the population.Natural selection is driven by genetic variation, which is created by mutation, gene flow, and sexual reproduction. Mutations are random changes in DNA that can create new traits, while gene flow and sexual reproduction can introduce new traits into a population. The traits that are favored by natural selection are those that increase an organism's chances of survival and reproduction in a given environment, which can lead to their predominance in a population.For such more question on camouflaged
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Which statement about copper, diamond, and silicon(IV) dioxide is correcta)Copper and silicon(IV) dioxide have similar electrical conductivityb)In diamond the carbon atoms are covalently bonded as flat sheetsc)In silicon(IV)dioxide the silicon and oxygen atoms are covalently bonded in flat sheetsd)The structure of copper includes a lattice of positive ions
Answers
Answer:
In diamond the carbon atoms are covalently bonded as flat sheets
In silicon(IV) dioxide the silicon and oxygen atoms are covalently bonded in flat sheets
The structure of copper includes a lattice of positive ions
Explanation:
Diamond and silicon(IV) dioxide are covalent network solids. Covalent network solids are made up of atoms joined to one another by covalent bonds to form a giant lattice, The solids are hard and have a very high melting point. They do not conduct electricity. So, for both diamond and SiO2, atoms are covalently bonded to yield flat sheets in a covalent bonded network solid.
Copper is a metallic substance having metallic bonds, a metallic crystal consists of positive ions and a cloud of electrons.