How many molecular orbitals are generated from the linear combination of two sp2 orbitals?.
Answers
The combination of two sp2 orbitals forms two molecular orbitals. The two molecular orbitals are formed as a result of the combination of two sp2 orbitals and are the bonding molecular orbital and the anti-bonding molecular orbital. A molecular orbital is generated from the linear combination of atomic orbitals.
The combination of two atomic orbitals is called a diatomic molecule. Diatomic molecules, such as H2 and O2, are made up of two atoms connected by a chemical bond.When two sp2 orbitals combine, two molecular orbitals are generated, which are the bonding molecular orbital and the anti-bonding molecular orbital. The bonding molecular orbital, which is lower in energy than the atomic orbitals, is formed from the constructive interference of the two atomic orbitals. The anti-bonding molecular orbital is higher in energy and is formed from the destructive interference of the two atomic orbitals.
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Related Questions
?
9. Oxygen will have a positive oxidation number
when combined with
(1) fluorine
(3) bromine
(2) chlorine
(4) iodine
in
Answers
Answer:
Flourine
Explanation:
Oxidation number will be +1 for oxygen and -1 for Flourine
Has anyone taken and or has any pointers on taking the
industrial electricity NOCTI # 2050.
Answers
Individuals who have studied industrial electricity will have a greater knowledge of electrical systems, circuits, and components, as well as the ability to troubleshoot and repair them. Here are a few pointers on how to prepare for and pass the Industrial Electricity NOCTI # 2050 exam:To prepare for the Industrial Electricity NOCTI # 2050, you should get hold of a reliable textbook or a study guide on industrial electricity.
Some good texts include Electrical Motor Controls for Integrated Systems, Electrical Wiring Residential, Electrical Systems Design, and Conduit Bending and Fabrication. As you read through the textbook, make notes and attempt the end-of-chapter review questions and problems.Read and study the test specifications. Test specifications outline what will be covered on the exam. Be sure you understand each of the test specifications and are capable of demonstrating the required skills.You may participate in a NOCTI practice test session. This can help you get familiarized with the exam pattern, and allow you to get a better understanding of the type of questions you can expect. You'll also receive feedback on how to improve your results.You can take online practice tests and quizzes. Several websites offer free online practice tests.
Take as many practice tests as you can to build your confidence. This will help you familiarize yourself with the test structure, type of questions, and time management strategies.Keep practicing. Keep practicing on sample questions and problems. You can also join a study group to work with other individuals who are preparing for the Industrial Electricity NOCTI # 2050.
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acids and bases react in neutralization reactions. hydrochloric acid is the primary component of human digestive fluid. acid indigestion is a result of the overproduction of hydrochloric acid in the stomach. stomach acid can be neutralized with an antacid tablet. the active ingredient in antacid tablets is magnesium hydroxide. what is the chemical formula for magnesium hydroxide?
Answers
Magnesium hydroxide, with the chemical formula Mg(OH)2, is an inorganic substance. It can be found as the mineral brucite in nature. It is a solid white material that is only weakly soluble in water.
Antacids like milk of magnesia have magnesium hydroxide as one of their ingredients. Constipation and reliance on laxatives develop from prolonged or excessive usage of this drug for constipation. Additionally, excessive use of magnesium hydroxide results in dehydration, persistent diarrhea, and mineral imbalances. When utilizing a large dose of magnesium hydroxide, the symptoms may include severe nausea, vomiting, or diarrhea.
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According to Frank, what is the “10 second rule"?
Opick it up off the gound within 10 seconds, and it's o.k. to eat
O Pick it up off the ground within 1 minute and it's ok to eat.
O Never pick things up off the ground and eat them.
Answers
Answer:
The first option, aka Opick it up off the gound within 10 seconds, and it's o.k. to eat
Explanation:
The 10 second rule is a rule when you drop foods, but if you get it off the floor under 10 seconds, you can eat it.
Did you know that food picked up under 10 seconds and after 10 seconds has almost the same number of bacterias? The 10 second rule is basically worthless.
When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a___________ Mixture.
Answers
The mixture has more than one phase of matter in it.
When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
What is precipitation reaction?Chemical reactions known as precipitation reactions take place in aqueous solutions to produce precipitates. Moreover, chemical changes that occur inside the substances are a part of chemical processes.
Moreover, chemical reactions take place between two or even more chemical substances, known as reactants. As a result, the reactants might be solid, gaseous, or liquid in nature. When a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
Therefore, when a precipitation reaction occurs the resulting mixture of liquid solution and solid precipitate would be considered a heterogeneous Mixture.
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1 pts
Define valence electrons.
o Valence electrons are the electrons on the outermost energy level of an
atom.
o Valence electrons are the electrons on the innermost energy level of an
atom.
Valence electrons are the electrons in the middle energy level of an
atom.
Valence electrons are the electrons on the inside of the nucleus of the
atom.
Answers
Answer:
Valence electrons are the electrons on the outermost energy level of an
atom.
The correct answer will be Valence electrons are the electrons on the outermost energy level of an atom.
What is the cell potential of an electrochemical cell that has the half-reactions
shown below?
Fe3++e Fe²+
Cu → Cu²+ + 2e
Click for a reduction potential chart
A. 0.43 V
OB. 1.2 V
O C. 1.1 V
OD. -0.43 V
Answers
The cell potential for the given electrochemical cell with Fe and Cu half-reactions is 1.1 V, calculated by subtracting their reduction potentials. The correct answer is option C.
Given half-reactions: \(Fe_3^+ + e^- \rightarrow Fe_2+Cu_2^+ + 2e^- \rightarrow Cu\). Since copper is nobler, the potential for the reaction of Fe to \(Fe_2^+\) is obtained from the reduction potential chart. And, the potential for the reaction of Cu to \(Cu_2^+\) is obtained by reversing the sign of the reduction potential. Hence, the cell reaction equation is: \(Fe_3^+ + Cu \rightarrow Fe_2^+ + Cu_2^+\)The cell potential can be determined using the following equation: E°cell = E°(reduction potential of the cathode) - E°(reduction potential of the anode) = \(E\textdegree (Cu_2^+ + 2e^- \rightarrow Cu) - E\textdegree (Fe_3^+ + e^- \rightarrow Fe_2^+)= (0.34 V) - (-0.77 V) = 1.11 V.\) The cell potential for the given electrochemical cell is 1.1V. Therefore, the correct answer is option C.SummaryThe cell potential for the given electrochemical cell with half-reactions \(Fe_3^+ + e^- \rightarrow Fe_2^+\) and \(Cu_2^+ + 2e^- \rightarrow Cu\) is calculated by subtracting the reduction potential of the anode reaction from the reduction potential of the cathode reaction, which is 1.1 V.For more questions on electrochemical cells
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Salt is both strong and brittle. These properties relate to its atomic bonds. Examine a toothpick and try to bend it. Then imagine hitting the end of an upright toothpick with a hammer. Is a toothpick a good model for showing the strength and brittleness of salt? Explain your answer.
Answers
Answer:
Yes, A toothpick can be a good model for showing the strength and brittleness of salt as It will break and splinter just like salt.
What are the properties of salt ?
Salts are ionic in nature due to the presence of ions.
They are brittle, hard and crystalline solids.
Salt is white, odorless and it has a salty taste.
Toothpick will break and splinter just like salt, exclamation, because it breaks easy and if we use a hammer on a tooth pick its gonna break and splinter just like salt.
Therefore , A toothpick can be a good model for showing the strength and brittleness of salt as It will break and splinter just like salt.
Explanation: hope this helps
What layer of the skin contains blood vessels, nerves and hair follicles?
Dermis
Epidermis
Hypodermis
Subcutaneous
Answers
Answer:
The answer to your question is Dermis
Explanation:
Below the epidermis is the dermis. This is where our blood vessels, nerve endings, sweat glands, and hair follicles are.
electrolysis
MgCL(dilute)+H2O=?
Answers
When MgCl2 (Magnesium chloride) dissolves in water gives a faintly acidic solution (pH = approximately 6).
Question 14 PM2.5 is defined as ________
- the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter. - the mass concentration of particles in the air equal to 2.5 micrometers in diameter. - the mass concentration of particles in the air greater than or equal to 2.5 micrometers in diameter. Question 15 Carbon dioxide (CO2) is a criteria air pollutant. - True - False Question 16 Roughly percent of emissions of carbon monoxide in Santa Clara County come from mobile sources (select the choice closest to the correct answer). - 50 - 75 - 25 Question 17
The term "photochemical smog" is most synonymous with which of the following criteria air pollutants? - lead (Pb) - carbon monoxide (CO) - sulfur dioxide ( SO2) - ozone (O3) Question 18 "Attainment" of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards. - True - False
Answers
: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.
Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.
Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.
Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.
Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.
Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.
Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.
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appropriate dress for lab includes (choose all that apply): group of answer choices halter or tank tops and micro-mini skirts.flip-flops or sandals.closed-toe shoes made of leather or other resistant material, nothing permeable like cotton or other fabric.clothes made of natural fibers (e.g. cotton or wool) that do not melt like synthetic fabrics.pants or long skirts that completely cover and protect your legs.a fitted short- or long-sleeved shirt--nothing with loose sleeves that can knock down containers or catch fire.an insulated winter parka and gloves, so you're completely protected from any chemical spills.
Answers
The appropriate dress for lab includes closed-toe shoes made of leather or other resistant material, nothing permeable like cotton or other fabric; clothes made of natural fibers (e.g. cotton or wool) that do not melt like synthetic fabrics; pants or long skirts that completely cover and protect your legs; and a fitted short- or long-sleeved shirt--nothing with loose sleeves that can knock down containers or catch fire.
How to wear appropriately in a Chemical Lab?It is important to wear appropriate clothing in a laboratory to protect yourself from potential hazards, such as chemical spills, fire, and other accidents. Clothing made of natural fibers can help reduce the risk of melting and burning in case of exposure to heat or chemicals. Closed-toe shoes made of durable materials provide protection against spills and falling objects. Avoiding loose clothing, such as halter or tank tops with micro-mini skirts, can prevent catching fire or knocking down containers. Insulated winter parka and gloves are not necessary for regular laboratory attire and may not be suitable for lab safety. It's always important to follow the dress code and safety guidelines of the specific laboratory you are working in to ensure proper protection.
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A xerographic copier uses a special photoconductor surface that allows light from an original document to control the placement of black powder on white paper. The photoconductor only conducts electricity when it's exposed to light because, in the dark:_________.
A) the photoconductor contains only negatively charged particles.
B) the photoconductor contains only positively charged particles.
C) electrons in the photoconductor completely fill its valence levels and can't shift from one level to another in order to transport charge through the material.
D) the photoconductor doesn't contain any electrically charged particles.
Answers
C) electrons in the photo conductor completely fill its valence levels and can't shift from one level to another in order to transport charge through the material.
In a xerographic copier, the photoconductor surface plays a crucial role in the process of transferring images from an original document to white paper. The photoconductor's ability to conduct electricity is directly related to its exposure to light.
When the photoconductor is in the dark, option C states that electrons in the photoconductor completely fill its valence levels and cannot shift from one level to another in order to transport charge through the material. This means that in the absence of light, the electrons in the photoconductor are in a stable configuration and do not have the energy or ability to move freely within the material to conduct electricity.
The concept of valence levels refers to the energy levels in an atom that are involved in the formation of chemical bonds. In the dark, the photoconductor's valence levels are fully occupied, and there is no movement of electrons that can result in the flow of electric charge.
Options A, B, and D suggest that the photoconductor contains only negatively charged particles, positively charged particles, or no electrically charged particles, respectively. However, these options do not explain the specific behavior of the photoconductor in the dark.
In the absence of light, the electrons in the photoconductor of a xerographic copier completely fill its valence levels and cannot shift from one level to another in order to transport charge through the material. This lack of electron mobility is what prevents the photoconductor from conducting electricity in the dark.
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Can the same fertilizer be applied to all types of soil ? Explain
Answers
The same fertilizer should be applied to all types of soil, which is false as different soils have different nutrient compositions and physical properties and therefore require different fertilizers to support plant growth.
What is fertilizer?Sandy soils tend to be low in nutrients and require fertilizers with high nitrogen content, while clay soils retain more nutrients and may require fertilizers with less nitrogen and more phosphorus and potassium. Additionally, different plants have different nutrient requirements, so the type of fertilizer needed will also depend on the crop being grown. Therefore, it is important to test the soil and determine its nutrient needs before applying any fertilizer to ensure the best possible growth and yields.
Hence, the same fertilizer should be applied to all types of soil, which is false as different soils have different nutrient compositions and physical properties and therefore require different fertilizers to support plant growth.
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Which of the following are an example of a polysaccharide?
A.starch
B.chitin
C.cellulose
D.sucrose
Answers
Examples include storage polysaccharides such as starch, glycogen and galactogen and structural polysaccharides such as cellulose and chitin. Here's the answer, but I think it's A
Why can air pollution be a problem even if you do not live next to a factory?
Answers
Answer:
cause pollution on a small scale can make big difference......
Explanation:
factory isn't a single source of pollution
there are many more.....
A sample of river water taken near to a factory
shows a pH of 5.
al Do you think this represents a pollution
problem? Give reasons for your answer.
b What other evidence might you need to
consider before reaching a conclusion?
Answers
a) A pH of 5 for river water near a factory does suggest a potential pollution problem. The normal pH range for most natural waters is around 6.5-8.5. pH values below 6.5 can indicate acidification, which can be caused by pollutants such as sulfur dioxide and nitrogen oxides from industrial activities, or from natural sources such as acid rain.
What is the river water about?A pH of 5 is more acidic than most natural waters and could indicate the presence of acidic pollutants in the water.
Therefore, in terms of b) Other evidence that would be useful to consider before reaching a conclusion about whether the pH of 5 represents a pollution problem includes:
Information about the specific factory located near the river and the activities that take place there. This could help to identify any potential sources of pollutants that could be causing the decrease in pH.Water quality testing for other parameters such as dissolved oxygen, temperature, and nutrient levels. This could help to identify other potential sources of pollution, and could help to determine the overall health of the river ecosystem.A comparison of the pH of the river water at different times of year, and at different locations along the river. This could help to identify any seasonal or regional patterns in the pH levels, which could be related to natural factors such as rainfall or the geology of the area.Read more about river water here:
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Earth is made mostly of metals and rocks. where did the elements (carbon, silicon, iron, etc.) that make up these materials form?
Answers
Earth is made mostly of metals and rocks. the elements (carbon, silicon, iron, etc.) that make up these materials form, and they were produced by nuclear fusion in stars.
Metals are materials that, when freshly worked, polished, or crushed, have a lustrous appearance and are relatively good conductors of electricity and heat. Metals are typically ductile and malleable. These properties are the result of metallic bonding between the atoms or molecules of the metal.
Metal is very useful material. Metals have many properties such as B. Strength, toughness, and stiffness. When heated, the metal can be shaped into anything from tiny paper clips to giant airplanes. It is also an excellent conductor of electricity and heat, making it useful for electricity and cooking pots.
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A block has a density of 1.73g/mL. What is the block’s density in mg/L
Answers
The formula when converting g/mL to mg/L is to multiply the mass / volume value by 1e+6
When we do this we come up with 1,730,000
This however, should be written as either 1.73⋅10^5 or 1.73E+5.
Convert 4.92L of hydrogen at STP to moles
Answers
Answer:
0.22moles
Explanation:
Given parameters:
Volume of gas = 4.92L
Unknown:
Number of moles = ?
Condition = STP
Solution
At STP, the number of moles of a given gas is expressed as;
Number of moles = \(\frac{volume given}{22.4}\)
Number of moles = \(\frac{4.92}{22.4}\) = 0.22moles
Indique cuáles son las unidades de la molaridad *
eq-g/m³
eq-g/L
mol/cm³
mol/L
Answers
Answer:
hm
Explanation:
When the equation
Cu + AgNO3 → Cu(NO3)2 + Ag
is balanced, the coefficient of copper (II) nitrate is
A. 0.
B. 3.
C. 1
Answers
An equation which follow the law of conservation of mass is called the balanced equation. The coefficient of copper (II) nitrate is 1 .The correct option is C.
What is a balanced equation?A chemical equation in which the number of atoms of reactants and products on both sides of the equation are equal is defined as the balanced chemical equation.
The coefficients are the numbers which are used to balance the chemical equation. They are added in front of the formulas. According to law of conservation of matter, mass can neither be formed nor be destroyed.
The balanced equation for the given reaction is:
Cu (s) + 2AgNO₃ (aq) → Cu (NO₃)₂ (aq) + 2Ag (s)
Here the coefficient of Cu (NO₃)₂ is 1. The number of 'Cu', 'Ag', 'N' and 'O' atoms are equal. So the given equation is balanced. The coefficient of AgNO₃ is 2, and 'Ag' is 2.
Thus the correct option is C.
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Ca + 2H2O → Ca(OH)2 + H2.
How many moles of H2O are needed to exactly react with 2. 0 moles of Ca?
Answers
To create one mole of H₂, 2.0 moles of Ca must be reacted with 4.0 moles of water.
From the balanced chemical equation:
Ca + 2H₂O → Ca(OH)₂ + H₂
we can see that 1 mole of Ca reacts with 2 moles of H₂O to produce 1 mole of H₂. Therefore, we need to calculate how many moles of H₂O are required to react with 2.0 moles of Ca.
If 1 mole of Ca reacts with 2 moles of H₂O, then 2.0 moles of Ca will react with:
2.0 moles Ca x (2 moles H₂O/1 mole Ca) = 4.0 moles H₂O
Therefore, 4.0 moles of H₂O are needed to react with 2.0 moles of Ca to produce 1 mole of H₂.
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HELPPP MEEEE
The compounds, H3PO4, HBr, H2SO4, and HNO3 are classified as which of the following?
Select one:
a. Bases
b. Acids
c. Neutral substances
d. Salts
Answers
Acids i think... because I know for sure H3PO4 is a acid and so is Hbr...
Answer:
B. Acids
Explanation:
All of them are acids because H3PO4 is phosphoric acid, HBr is hydrobromic acid, H2SO4 is sulfuric acid, and HNO3 is nitric acid.
Pls. give me a lot of points I took a lot of time to help you. :)
A gas has a pressure of 50.0 mm Hg at 540 K. What is the pressure at 200.0 K if there is no volume change? *
17.0 mmHg
18.5 mmHg
19 mmHg
22.5 mmHg
Answers
a student wants to test the effect of different amounts of caffeine of different amounts of caffeine on the heart rate of daphnia, a small crustacean. What is the dependent variable?
Answers
The dependent variable is the heart rate of daphnia, a small crustacean.
WHAT IS INDEPENDENT AND DEPENDENT VARIABLES?
In an experiment, two variables are important. These two variables are the independent variable and dependent variable.
The independent variable is the variable that the experimenter alters or changes in order to bring about a change. On the other hand, the dependent variable is the variable that the experimenter measures or records in response to a change in the independent variable. In this question, a student wants to test the effect of different amounts of caffeine on the heart rate of daphnia, a small crustacean. The student will change the amount of caffeine, making it the INDEPENDENT VARIABLE while the heart rate of the small crustacean will be measured, making it the DEPENDENT VARIABLE.Therefore, the dependent variable is the heart rate of daphnia, a small crustacean.
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what is the temperature of gas and volume of gas
Answers
Explanation:
500 degree Celsius because we can see it in the tube
2KCI(s) + 30₂(g) → 2KCIO3(s)
AHKC = -435.9 kJ/mol
=-391.4 kJ/mol
ΔΗ, ka03
Which of these are true for the reaction above? Check all that apply.
AHxn is 89.0kJ.
AHxn is-827.3kJ.
The reaction is endothermic, +AH.
The reaction is exothermic, -AH.
Heat is a reactant.
Answers
Endothermic in nature, the reaction is as stated above, +AH.
An endothermic reaction is what?Endothermic reactions are chemical processes that generate products by absorbing heat energy from the environment around the reactants. By lowering the temperature of the area around them, these reactions have the effect of cooling the surrounding area.
How can you determine whether a reaction is endothermic or not?Therefore, a reaction is exothermic and its enthalpy will be negative if it releases more energy than it takes in. Consider this as a certain quantity of heat evaporating from (or being removed from) the reaction. Because endothermic reactions absorb or use more energy than they generate, they have positive enthalpies.
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Energy is the work that done by a force acting through a distance And involves motion
Answers
Answer:
true
Explanation:
energy is the energy to do things
and there is a force in our bodies wich is giving out energy through a distance
15 points
What is the mass of 6.45x10^25 atoms Cu? The molar mass of Cu is 63.55g/mol.
A. 0.593 g Cu
B. 6810 g Cu
C. 3.88x10^49 g Cu
D. 107 g Cu
Answers
Molar mass of Cu = 6.45x10^25 atoms.
The molar mass of Cu = 63.55g/mol.
Mass of Cu= ?
Thus, Mass of cu= Molar mass of Cu / The molar mass of Cu
= 6.45x10^25 atoms/ 63.55g/mol.
= 0.176 g
The chemical element copper has the atomic number 29 and the letter Cu, which comes from the Latin word cuprum.
It is an extremely high thermal and electrical conductivity metal that is soft, malleable, and ductile. Pure copper has a pinkish-orange tint when it is first exposed to the air.
Thus, Molar mass of Cu = 6.45x10^25 atoms.
The molar mass of Cu = 63.55g/mol.
Mass of Cu= ?
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