Electronic configuration of Cu is 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d9 ([Ar] 4s2, 3d9), whereas for Cu2+ is [Ar],\(3d^{9}\) and it has 1 unpaired electron.
For the Cu2+ ion we remove a total of two electrons (one from the 4s1 and one form the 3d10) leaving us with\(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{9}\).
How to write an electronic configuration?1. Identify the given element and its atomic number from the periodic table.
2. Write the electron configuration by the energy level and the type of orbital first, then the number of electrons present in the orbital as superscript.
The easiest way to write the electronic configuration for any element is by using a diagonal rule for electron filling order in the different subshells according to the Aufbau principle.
The 3 rules for writing the electron configuration in the orbital box diagram are – the Aufbau rule, the Pauli-exclusion rule, and Hund's Rule.
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A restaurant advertises that it is environmentally friendly. It describes the solar panels it uses to generate electricity and the locally grown produce it serves. All the meals it offers are prepared over an open wood fire. Food is served on recycled copper plates, and drinks are served in recycled aluminum cups.
Which correctly lists three renewable resources used by the restaurant?
aluminum, copper, produce
copper, produce, sunlight
produce, sunlight, wood
sunlight, wood, aluminum
its c! just got my account unbanned `⍽`
Answer:
sunlight ,copper,produce
Explanation:
Recycling copper is quite easier than aluminium so we ommited option D and A
Sunlight is major renewable resources used in solar panelCopper is used in serving foodSo option B is correct
Vertical sashes should be closed except when
- Measuring the airflow of a hood
- Access to equipment inside the hood is necessary
- There is some chemical reaction occurring inside the hood
- One expects an explosion
Vertical sashes in a fume hood are an important safety feature that help to contain hazardous materials and protect the user. Typically, these sashes should be closed at all times except when certain circumstances arise. For instance, they may need to be opened to measure the airflow of a hood.
Which is essential for ensuring proper ventilation and preventing dangerous buildup of fumes or vapors. Similarly, if there is a need to access equipment inside the hood, the sashes may be opened temporarily. In some cases, if there is a chemical reaction occurring inside the hood, the sashes may need to be opened slightly to allow for proper ventilation. Finally, if there is an expectation of an explosion, the Vertical sashes should be opened to minimize the risk of injury. In general, it is important to follow proper safety procedures and guidelines when working with fume hood to ensure the safety of both the user and the surrounding environment.
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Covalent compounds Need you guys
a. The names for the chemical compounds in the task given above are as follows:
CO₂: Carbon dioxideP5N7: Pentaphosphorus heptanitride.CO: Carbon monoxideP5Br3: Pentaphosphorus tribromideSF6: Sulfur hexafluorideN2O8: Nitrooxyperoxy nitrateSCl4: Sulfur tetrachlorideSi2Br9: Disilicon nonabromideMg3P2: Magnesium phosphideBaO: Barium oxideCa3N2: Calcium nitrideLiI: Lithium iodideb. The formula for the compound given above are:
Chlorine dioxide: ClO₂Dinitrogen trioxide: N₂O₃Phosphorus pentoxide: O₁₀P₄Dihydrogen monoxide: H₂OHexaboron monosilicide: B6SiChlorine dioxide: ClO₂Hydrogen monoiodide: HIHexaboron hexasilicide: B6Si6.What is a compound?It is a substance formed between two two or more different elements which are chemical compound together and whose properties are entirely different from the properties of the contribution elements.
In conclusion, we can now confirm from the explanation given above that a compound could be ionic or molecular.
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After comparing the 20% cranberry juice absorption spectrum to the 20% apple juice absorption spectrum, do you think that apple juice contributes to the color of cranberry-apple juice at the λmax you selected? why or why not?.
Color of apple and cranberry juice is yellow and red respectively as the two colors of juices are different each color has it's own λ max according to Beer's law and hence apple juice contributes to color of cranberry-apple juice .
What is Beer's law?The Beer's law states that the absorbance is directly proportional to the concentration of a solution that is,A∝C .Most substances follow Beer's law from low to moderate temperature ranges only.It is not followed well in case of saturation effects which are present in highly concentrated samples.
Due to the direct relation between absorbance and concentration , absorbance is preferred over transmittance for recording the spectra.
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When the umbilical cord is tied after birth, the umbilical arteries close by filling in with. A) placental fluid. B) platelet plugs. C) connective tissue.
When the umbilical cord is tied after birth, the umbilical arteries close by filling in with connective tissue. The umbilical arteries carry deoxygenated blood from the fetus to the placenta, where the blood is oxygenated and returned to the fetus via the umbilical vein.
When the umbilical cord is cut, the flow of blood from the placenta to the fetus ceases, and the umbilical arteries and vein begin to constrict. This constriction is caused by the contraction of smooth muscles in the vessel walls and the closure of small valves within the vessels. As the umbilical arteries constrict, the flow of blood to the placenta decreases and the vessels begin to fill in with connective tissue. Over time, the connective tissue replaces the smooth muscle and valve tissue in the vessel walls, resulting in the complete closure of the umbilical arteries. This process is important to prevent bleeding and infection in the newborn.
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True or False of the three states of matter, molecules in solids have the greatest
freedom of motion.
Answer:
False.
Explanation:
The molecules are tightly packed together in solids, I'm pretty sure the matter with the most molecular freedom is a gas.
Describe the relationship between the nucleus and energy levels of an atom.
_______ is a property of matter?
Answer:
DENSITY!!! mark as brainliest
Explanation:
Compare the boiling point and vapor pressure of chloroform and glycerol
Answer:
Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.
Explanation:
Chloroform has a boiling point of 61.15 degrees Celsius and a vapor pressure of 9.5 kPa at 20 degrees Celsius. Glycerol, on the other hand, has a boiling point of 290 degrees Celsius and a vapor pressure of 0.0002 kPa at 20 degrees Celsius. Therefore, chloroform has a much lower boiling point and a much higher vapor pressure than glycerol. This means that chloroform is more volatile and evaporates more easily than glycerol.
Which element has four times as many protons in its nucleus than are found in neon.
Answer:
beryllium atom
Explanation:
An atom with two protons is always a helium atom. If scientists count four protons in an atom, they know it's a beryllium atom.
Help please!!! What is the mass of 9.25 moles of Mn203?
Answer:
0.05859091769326505 moles Mn203
Explanation:
24 points
Which two particles have opposite charges?
O A. lons and neutrons
B. Electrons and protons
OC. Neutrons and protons
OD. Electrons and neutrons
Answer:B
Explanation: according to the law of electrostatics it states that "unlike charge attract each other and like charges repel each other ".
(T/F) the most abundant cation in intracellular fluid is sodium.
False , The most abundant cation in intracellular fluid is potassium (K+), not sodium (Na+). Potassium ions are found in higher concentrations inside cells, contributing to the positive charge within the intracellular environment.
Sodium ions, on the other hand, are more abundant in extracellular fluid. The concentration gradient of sodium and potassium across the cell membrane plays a crucial role in various cellular processes, including the generation of action potentials and the maintenance of cell volume and osmotic balance.
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There are limits with regard to the time that hazardous waste can be stored on site for
Conditionally exempt small quantity generators
Small quantity generators
Large generators
Both (b) and (c)
Both (b) and (c) small and large quantity generators have specific time limits for storing hazardous waste on-site.
Hazardous waste refers to materials that pose significant threats to public health or the environment if improperly managed. Different types of hazardous waste generators are categorized based on the amount of waste produced. These categories are conditionally exempt small quantity generators (CESQGs), small quantity generators (SQGs), and large quantity generators (LQGs).
Conditionally exempt small quantity generators (CESQGs) produce the least amount of hazardous waste. They can store waste on-site for an indefinite period, provided that they do not exceed the accumulation limits of 1,000 kg or about 2,200 lbs of hazardous waste.
Small quantity generators (SQGs) generate more hazardous waste than CESQGs but less than LQGs. They can store waste on-site for up to 180 days or 270 days if the waste must be transported over 200 miles to a disposal facility. SQGs have an accumulation limit of 6,000 kg or about 13,200 lbs of hazardous waste on-site.
Large quantity generators (LQGs) produce the most hazardous waste. They can store waste on-site for up to 90 days and must comply with strict storage requirements. LQGs do not have a specific accumulation limit but must manage their waste properly and follow disposal regulations.
Therefore, the answer to your question is "Both (b) and (c)," referring to small quantity generators and large quantity generators. Proper hazardous waste management is crucial to minimize risks to public health and the environment.
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the end of the axon where it contacts a target is called the
The end of the axon where it contacts a target is called the synaptic terminal or axon terminal.
The synaptic terminal is the specialized structure located at the end of the axon in a neuron. It is responsible for transmitting signals from the neuron to the target cell, which can be another neuron, muscle cell, or glandular cell.
The synaptic terminal contains synaptic vesicles filled with neurotransmitter molecules. When an electrical impulse (action potential) reaches the terminal, it triggers the release of neurotransmitters into the synaptic cleft, a small gap between the terminal and the target cell.
The neurotransmitters then bind to receptors on the target cell's membrane, initiating a response in the target cell, such as the generation of an electrical impulse or the release of hormones.
Overall, the synaptic terminal plays a crucial role in facilitating communication between neurons and their target cells, enabling the transmission of signals across the nervous system.
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Temperature is a measure of the internal bonding energy. True False
Answer:
Explanation:
True
Convert 8.84 g O₂ to moles. Round answer to the hundredths place.
8.84 g of oxygen gas in moles is 0.276 moles.
How to calculate moles from mass?The mass of a substance can be converted to moles using the following expression:
moles = mass ÷ molar mass
Moles of a substance refers to the base unit of amount of substance. It is the amount of substance of a system which contains exactly 6.02214076 × 10²³ elementary entities (atoms, ions, molecules, etc.).
molar mass of oxygen gas = 32g/mol
moles = 8.84g ÷ 32g/mol
moles = 0.276 moles
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A copper coin with a mass of 6.30 grams changes temperature in the sunshine from 20.0°C to 32.0°C. How much energy is transferred? The specific heat capacity of copper is 0.377 joules/gram degree Celsius. Express your answer to three significant figures.
The amount of energy transferred to the coin is
joules.
Answer:
q = mC∆T
q = heat = ?
m = mass = 6.30 g
C = specific heat = 0.385 J/g/deg
∆T = change in temperature = 32-20 = 12º
q = ((6.30 g)(0.385 J/g/deg)(12 deg) = 29.1 J (to 3 significant figures)
Explanation:
How does Amber data provide possible evidence that matter is made of particles too small to be seen
Which of these statements are true? Select all that apply. The Delta.Hf for Br2(I) is 0 kJ/mol. The Delta.Hf for He(I) is 0 kJ/mol. The Delta.Hf for Hg(I) is 0 kJ/mol. The Delta.Hf for Cl2(g) is 0 kJ/mol. The Delta.Hf for N2(I) is 0 kJ/mol. CORRECT ANSWER IS A, C, AND D.
Answer: The correct options are A, C and D.
Explanation:
Enthalpy of formation is defined as the change in the enthalpy when 1 mole of a chemical substance is formed from its pure element at standard conditions. It is represented by the symbol \(\Delta H_{f}\)
Enthalpy of formation for elemental atoms is always equal to 0.
We know:
Bromine (Br) exists in a liquid state.
Helium (He) exists in a gaseous state.
Mercury (Hg) exists in a liquid state.
Chlorine (Cl) exists in a gaseous state.
Nitrogen (N) exists in a gaseous state.
For the given options:
The \(\Delta H_{f}\) for \(Br_2(l), Hg(l)\text{ and }Cl_2(g)\) will be equal to 0 because they are formed by the natural states of their elemental atoms.
Hence, the correct options are A, C and D.
A substance in its standard state has an enthalpy of formation of 0 kJ/mol.
The enthalpy of formation of a substance in its standard state is 0 kJ/mol.
The standard state of a substance refers to its state at 1 atm and at a temperature of 298 K. Bearing this in mind, we can now identify the true and false statements.
So,
ΔHf for Br2(I) is 0 kJ/mol - True
ΔHf for He(I) is 0 kJ/mol - False
ΔHf for Hg(I) is 0 kJ/mol - True
ΔHf for Cl2(g) is 0 kJ/mol - True
ΔHf for N2(I) is 0 kJ/mol - False
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The molar mass of Cu2CO3 is
a. 123.5 g/mol b. 155.0 g/mol
c. 187.0 g/mol
d. 211.0 g/mol
Answer:
a because it has a 2 and 3 in ot like it says in the question
you receive a beer mug filled with beer and ice cubes from a bartender inside a sports bar where the room temperature is maintained at 20 oc. what is the temperature (in oc) of your drink while you walking toward your seat?
The temperature must be 0°C of the drink while walking toward your seat.
Phase change -When matter transitions from one state (solid, liquid, gas, or plasma), it goes through a phase shift. Both when the pressure on the system changes and when enough energy is added to (or taken away from) the system, these changes take place. Depending on the system's chemical and physical characteristics, different temperatures and pressures are required for these changes to take place. Latent heat is the name for the energy involved in these changes.
Room temperature=20°C
Beer and Ice
There is the change of phase of ice into the water so temperature must be 0°C. (water-ice phase change at 0°C).
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What happens in a double-replacement reaction?
A. An element replaces an element in another compound.
B. Two reactants combine to form one compound.
C. One compound separates into two or more products.
O D. The elements in two compounds switch places
Answer: D
Explanation: trust
Answer:
Explanation:
D
30 POINTS!!! PLEASE I'M VERY DESPERATE!
Please help me answer the questions, I'm horrible at reading and I can't focus, please help T-T
1) elements are composed of atoms, which are the tiny building blocks that compose matter.
2) Atoms resemble a solar system: the sun being the nucleus (protons and neutrons) and the electrons being the planets that orbit the nucleus.
3) Mostly everything (food, electronics, animals, plants, air)
4) The # of protons in the element
5) The same elements that were forged by stars are also present in us
what are the factors affecting gravity?
Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:
Mass: The most significant factor affecting gravity is the mass of the objects involved. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses. Greater mass leads to a stronger gravitational force.Distance: The distance between two objects also plays a crucial role in the strength of gravity. According to the inverse square law, the gravitational force decreases as the distance between objects increases. As objects move farther apart, the gravitational attraction between them weakens.Gravitational Constant: The gravitational constant, denoted by G, is a fundamental constant in physics that determines the strength of the gravitational force. It is a universal constant and does not change, affecting the overall magnitude of gravity.Shape and Distribution of Mass: The distribution of mass within an object can influence the gravitational field it generates. Objects with a more compact and concentrated mass distribution will have a stronger gravitational pull compared to those with a more spread-out mass distribution.External Influences: Gravity can be influenced by external factors such as nearby celestial bodies or the presence of other forces. For example, the gravitational interaction between the Earth and the Moon affects tides on Earth's surface.Brainliest please helppppppppp
Ayour anwerser
Explanation
Answer:
chlorine manoxside
co2
Explanation:
Prokaryotic cells and Eukaryotic cells both contain all 4 biomolecules. True or False
In which of these diatomic molecules would you NOT find an octet of electrons
around each atom? *
Nitrogen, N2
Hydrogen H2
Oxygen, 02
Fluorine, F2
Answer:
The hydrogen molecule is the only one in which can not find an octet of electrons around each atom.
Explanation:
Let's evaluate each case.
1. Nitrogen (N₂):
With Z = 7, nitrogen has the following electronic configuration
1s²
2s² 2p³ → valence electrons
Since its valence electrons are 5, in the molecule one nitrogen atom shares 3 electrons with the other one, and each remains with an electron pair, so each atom has an octet of electrons.
2. Hydrogen (H₂):
With Z = 1, its electronic configuration is:
1s¹ → valence electron
In the molecule, the hydrogen atoms share the only electron they have, so they will have only 2 electrons around. In this diatomic molecule, we can not find an octet.
3. Oxygen (O₂):
Z = 8. Electronic configuration:
1s²
2s² 2p⁴ → valence electrons
In the diatomic molecule, each oxygen atom shares 2 electrons with the other one and remains with 2 pairs of electrons, therefore, each oxygen atom has an octet.
4. Fluorine (F₂)
Z = 9. Electronic configuration:
1s²
2s² 2p⁵ → valence electrons
In this molecule, each fluorine atom shares 1 electron with the other and remains with 3 pairs of electrons, hence, each fluorine atom has an octet of electrons around.
Finally, we can say that the hydrogen molecule is the only one in which can not find an octet of electrons around each atom.
I hope it helps you!
a reaction mixture was formed by adding 55 ml h2o, 5.0 ml of 0.88 m h2o2, and 10.0 ml of 0.50 m ki. what is the molarity of the h2 o2 in the reaction mixture? answer 1 choose... what is the molarity of the ki in the reaction mixture?
The molarity of the H₂O₂ in the reaction mixture will be 0.063 M
The molarity of the KI in the reaction mixture will be 0.071 M
Volume of H₂O = 55 ml
Volume of H₂O₂ (V1) = 5.0 ml
Volume of KI = 10.0 (V1) ml
Molarity of H₂O₂ (initial M1) = 0.88 M
Molarity of KI (initial M1) = 0.50 M
Molarity of H₂O₂ (final M2) = ?
Molarity of KI (final M2) = ?
Calculate the total volume V2
V2 = 55.0 ml + 5.0 ml + 10.0 ml
V2 = 70.0 ml
Calculate the molarity of H₂O₂ by using the following equation:
M1 × V1 = M2 × V2
Rearrange it for M2
M2 = M1 × V1 / V2
Put the values
M2 = 0.88M × 5ml / 70ml
M2 = 0.063M
Calculate the molarity of KI by using the following equation:
M1 × V1 = M2 × V2
Rearrange it for M2
M2 = M1 × V1 / V2
Put the values
M2 = 0.5 M × 10 ml / 70ml
M2 = 0.071 M
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Gamma rays are often used to kill microorganisms in food, in an attempt to make the food safer. Some people contend that this irradiated
food is actually less safe to eat. Which, if true, would most effectively dispute their idea? (1 point)
a
Irradiated food only emits alpha particles, which are harmless.
Ob
Irradiated food is shown to not be radioactive.
C
Irradiated food only contributes to background radiation.
Irradiated food has molecules that undergo transmutation,
Od
Answer:
b . Irradiated food is shown to not be radioactive.
Explanation:
If it can be proven that irradiated food is not radioactive, then it will effective dispute the idea that irradiated food are less safe to eat.
An irradiated food is one in which ionizing radiations have been employed to improve food quality. Thus, bacteria and other food spoilers can be exterminated from the food. Most irradiated food do not contain radiation and are fit for consumption.If it can be proven, that this is true, then it will challenge the idea that irradiated foods are not safe.