descoberto em 1996 por pesquisadores alemães o novo elemento químico de numero 112 poderá ser batizado de copernicium em homenagem ao cientista e astronomo Nicolau Copérnico segundo os cientistas o elemento é aproximadamente é 277 vezes mais pesado que o hidrogênio, o que torna o elemento mais pesado da tabela periódica ocupando a posição relativaa ao 7°periodo do grupo 12. A tabela periódica, uma das realizaações mais notáveis da quimica, foi desenvolivda exclusivamente a partir das propriedades fisícas e químmicas dos elementos e, por isso, o conhecimento da posição ocupada por um elemento químico permite que se façam algumas previsões quanto às suas propriedades.

considerando a localização dos átomos dos elementos químicos x, y e z na tabela periódica é incorreto afirmar que

x = 3° período do grupo 1 (I A)
y = 2° período do Grupo 14 (IV A)
z = 2° período do grupo 16 (VI A)

If one of the products is added to a system initially at equilibrium, then the reaction will proceed in the backward direction in order to decrease Q so that it once again equals K.

Equilibrium- A dynamic equilibrium is one in which the rate of the forward reaction is equal to the rate of the backward reaction. It happens when a reversible reaction is taking place in a closed system. It is described as dynamic because it appears that the reaction is continuing in the forward and reverse directions. However, since the forward and reverse reactions are occurring at the same rate, the concentrations of the reactants and products do not change in the mixture.

An equilibrium constant, k, is a value that gives information about the extent to which a reversible reaction has gone to completion. At equilibrium, the product of the concentrations of the reaction products elevated to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is equivalent to a constant value referred to as the equilibrium constant. This constant depends solely on the temperature of the reaction. It represents the ratio of the concentrations of the products to the concentrations of the reactants.

The reaction quotient, Q, is used to determine if a reaction has achieved equilibrium. It is a value that is calculated by dividing the concentrations of the reaction products raised to their stoichiometric coefficients by the concentrations of the reactants raised to their stoichiometric coefficients. At equilibrium, the value of Q equals the equilibrium constant, K. If Q is less than K, then the forward reaction is preferred. If Q is greater than K, then the reverse reaction is preferred.

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The Pco₂ in the systemic venous blood will rise if the Pco₂ in the tissues rises.

According to Dalton's law, which is also known as the law of partial pressure, each gas in the air contributes a different amount to the overall atmospheric pressure depending on how much of the total volume it makes up.

Gas A will diffuse more quickly than gas B if the two gases have the same partial pressure but gas A has a higher water solubility coefficient than gas B.

According to Henry's law, a gas's solubility coefficient and partial pressure determine how much of it dissolves in water.

Gas B will diffuse into the blood more quickly if gas A's alveolar partial pressure is 110 mm Hg and gas B's partial pressure is 135 mm Hg.

According to Boyle's law, a gas's volume at a constant temperature is inversely proportional to its pressure.

The Pco₂ in the systemic venous blood will rise if the Pco₂ in the tissues rises.

Henry's law: This law describes the dissolution of gases in liquids. According to this, the amount of gas dissolved in a liquid depends on the gas's solubility coefficient and partial pressure above the liquid.

Boyle's law: This rule explains how a gas's volume and pressure are related. According to this law, the volume of a gas is inversely proportional to its pressure if the temperature stays constant.

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Answer:

A. genetically identical

Explanation:

Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent. A single individual can produce offspring asexually and large numbers of offspring can be produced quickly

All the offspring that are produced in the process are genetically identical.

When we talk about this mode of reproduction, we talk about a mode of reproduction in which an organism reproduces without the fusion of gametes. This occurs essentially by cell division.

When this occur, there is no crossing of genetic material as such, all the offspring that are produced in the process are genetically identical.

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Yes, the statement is true, undiluted side-stream smoke contains higher concentrations of toxic compounds than mainstream smoke.

The fatal potential of substances like lead, formaldehyde, asbestos, and arsenic is widely known. However, understand the specific health effects of exposure or the threshold at which they become toxic. What about the toxic substances we learned about in the news, like mercury in canned tuna, BPA in plastic, and cadmium in jewelry. The Toxic Compounds Portal offers a search engine that enables users to find chemicals by name, CAS number (Chemical Abstract Service registration number), synonym, or trade name. Users have access to additional substance search techniques. Substances that could have an adverse effect on organ systems' health (e.g., cardiovascular or respiratory systems) The chemical class includes metals, pesticides, and volatile organic substances. Individuals in the area looking for precise information on pollutants and how they affect health professionals in toxicology and public health looking for information on toxicity and associated health risk level experts who respond to cases of severe chemical exposure, such as emergency room physicians.

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Answer:

D

Explanation:

Period is horizontal group, so left to right it does increase. Down the side they are numbered 1-7 and depending on valence electrons they can have different properties

Answer:

A

Explanation:

Im pretty sure it's A. I MIGHT be wrong so dont quote me on this. THis is what the internet says:

"Atomic Radius. Atomic radii decrease from left to right across a period and increase from top to bottom along a group."

The following battery is not rechargeable is A. alkaline.

Alkaline batteries are primary batteries that have a very long life span and are commonly used in households, these batteries are designed for one-time use only and cannot be recharged. Zinc, manganese oxide, and potassium hydroxide are the primary constituents of alkaline batteries. Because of their long shelf life and relatively high capacity, they are widely used in low-drain and high-drain devices. Lithium-ion batteries, lead-acid batteries, and nickel-cadmium batteries, on the other hand, are all rechargeable.

Lithium-ion batteries are used in a variety of electronic devices, including cellphones, laptops, and cameras. Lead-acid batteries are often used in automobiles and boats. Nickel-cadmium batteries, on the other hand, are used in power tools and portable electronic devices, among other things. So therefore the correct answer is A. Alkaline batteries are not rechargeable.

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A substance with weak intermolecular forces vaporizes more easily and therefore has a low vapor pressure. (option 1)

The strength of intermolecular forces between molecules determines how tightly they are held together in the liquid state. In general, substances with weaker intermolecular forces require less energy to break the bonds holding them together and vaporize more easily. As a result, they have a higher tendency to escape into the gas phase and have a higher vapor pressure.

On the other hand, substances with stronger intermolecular forces require more energy to overcome the forces holding them together and have a lower tendency to vaporize. Therefore, they have a lower vapor pressure. So, the correct statement is "A substance with weak intermolecular forces vaporizes more easily and therefore has a low vapor pressure."

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Complete Question:

which statement correctly describes the relationship between intermolecular forces and the vapor pressure of a substance? multiple choice question.

The atmospheric pressure in Denver is 0.833 atm.

Atmospheric pressure in Denver:

To find the atmospheric pressure in Denver, we need to consider the partial pressure of oxygen and its proportion in the atmosphere. Oxygen makes up approximately 21% of the Earth's atmosphere. Using the partial pressure formula, we can find the atmospheric pressure:

Partial pressure of oxygen = (Mole fraction of oxygen) × (Atmospheric pressure). . . . . . . . . . . . . . .eq. (1)

Mole fraction of oxygen:

The mole fraction of oxygen gas is the fraction of the total moles of gas in the atmosphere that are oxygen. To calculate this, we can assume that the composition of the atmosphere is the same as at sea level (about 21% oxygen and 79% nitrogen).

Using this assumption, we can calculate the mole fraction of oxygen gas:

Mole fraction of oxygen gas = (0.21 mol oxygen / 1 mol air) / (0.21 mol oxygen / 1 mol air + 0.79 mol nitrogen / 1 mol air)

Mole fraction of oxygen gas = 0.21 / (0.21 + 0.79) = 0.21

Now plug the values in eq. (1):

0.175 atm = (0.21) × (Atmospheric pressure)

To find the atmospheric pressure, divide the partial pressure of oxygen by the mole fraction of oxygen:

Atmospheric pressure = 0.175 atm / 0.21

Atmospheric pressure ≈ 0.833 atm

So, the atmospheric pressure in Denver, Colorado is approximately 0.833 atm.

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Answer:

7 O2

Explanation:

My method involves counting all the elements in the equation. There must be an equal amount of each on both sides. Because it's asking for O2 only, look for compounds that deal with O2

So...CO2 and H2O only on the product side for this chemical equation.

Count the total O there is

CO2 has 2 O in one molecule, so 4 CO2 molecule is 8 Oxygen

H2O has 1 O in one molecule, so 6 H2O molecule is 6 Oxygen.

Your total O on the product side is 14

On the reactant side, the O2 is paired because O2 likes to be stable, so one O2 molecule has 2 O. This means that 2x = 14, which is 7.

Your answer is 7

Answer:

7 O2

Explanation:

You are given the balanced equation 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(ℓ) You are given rules for assigning oxidation numbers in Table 9.3 on page 604 of the student textbook. Compare the oxidation numbers of the atoms of each element on both sides of the equation. ... Therefore, the reaction is a redox reaction.

Answer:

astronomers know that sunspots are associated with magnetic fields because they can look at the spectral lines that come from the sunspots and measure by how much these lines are split.

The concentration of sucrose at 39 minutes would be 0.2263 M

To answer your question, we need to use the rate constant that was found in part b.

Since the reaction is zero order in sucrose, the rate law would look like: rate = k [sucrose]^0 which simplifies to:

rate = k

We can use this rate law to calculate the concentration of sucrose at 39 minutes.

To do so, we first need to calculate the value of k.

From part b, we know that the rate constant is 0.0023 M/min.

Next, we can use the integrated rate law for zero-order reactions:

[sucrose] = [sucrose]0 - kt

where [sucrose]0 is the initial concentration of sucrose, k is the rate constant, and t is the time elapsed.

Plugging in the given values, we get:

[sucrose] = 0.316 M - (0.0023 M/min)(39 min)

[sucrose] = 0.316 M - 0.0897 M

[sucrose] = 0.2263 M

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The composition and growth method, which enable the development of BCN films predominating between insulating BN and semimetallic graphite, determine the properties of BCN thin films. The influence of synthesis settings on various BCN characteristics are investigated in this regard.

Van der Waals bonds, of which hydrogen bonding is an example, are crucial to the characteristics of water and to how it behaves in biology. Dipole-dipole interactions with bonds between hydrogen and other atoms are thought to be the cause.

Both inorganic materials like water and biological compounds like DNA and proteins include hydrogen bonding. Van der Waals attractions, which depend on tiny variations in the electron concentrations, can happen between any two or more molecules.

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If the barometer reading is too high, the molar mass of the compound will be too low. If the barometer reading is too low, the molar mass of the compound will be too high.

The molar mass of the compound will be reported as higher than the actual value. This is because the barometer is used to calculate the pressure of the gas, and the pressure is used to calculate the molar mass. If the pressure is too high, the molar mass will be too low.

A barometer is an instrument that is used to measure the pressure of a gas. The pressure of a gas is the force that the gas exerts on a surface. The pressure of a gas is usually expressed in units of atmospheres.The molar mass of a substance is the mass of one mole of the substance. The molar mass of a substance is usually expressed in grams per mole. Hence if the barometer reading is recorded to be higher than the actual value, the reported value of the molar mass of the compound will be too low.

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The evidence that refutes the statement is: 4 EVIDENCE: Scientists have observed galaxies are moving away from us.

According to the observations made by astronomers, galaxies in the universe are not only moving away from each other, but they are also moving away from us.

This phenomenon is known as the expansion of the universe, and it contradicts the idea that all matter and energy in the universe was initially concentrated in a tiny corner of space during the time of the big bang and has since filled up the entire universe.

The observation that galaxies are moving away from us suggests that the universe is expanding in all directions. This expansion implies that the universe was not initially confined to a specific location but rather underwent a rapid expansion from a highly dense and hot state.

Therefore, the idea that all matter and energy in the universe was initially concentrated in a small corner of space and then expanded to fill up the whole universe is inaccurate based on the evidence of the observed expansion of galaxies. Evidence 4

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Answer:

Soapy detergents clean more effectively than normal soap. Hard water (water with high mineral content). Hard water can be used with soapy detergents but soap cannot be used with hard water. When soapy detergent and hard water are combined it makes a protective film that is really resistant to rinsing.

Have a good day.

A. In this solution, water is the solvent and NaBr is the solute. The water molecules surround the Na+ and Br- ions, dissolving them and keeping them in a homogeneous mixture.

B. In this solution, both ethanol and water are solvents, and they are miscible. Ethanol molecules are surrounded by other ethanol molecules, and water molecules are surrounded by other water molecules. Therefore, each solvent dissolves in the other, and there is no clear distinction of solute and solvent.

C. In this solution, water is the solvent and AgNO3 is the solute. The water molecules surround the Ag+ and NO3- ions, dissolving them and keeping them in a homogeneous mixture.

A. In the solution containing 25.0 g of NaBr and 100.0 g of water, water is the solvent and NaBr is the solute. This is because water is present in greater quantity and serves as the medium in which the NaBr is dissolved.

B. In the solution containing 30.0 mL of ethanol and 20.0 mL of water, ethanol is the solute and water is the solvent. This is because water is present in greater quantity and serves as the medium in which the ethanol is dissolved.

C. In the solution containing 0.5 g of AgNO3 and 15 mL of water, water is the solvent and AgNO3 is the solute. This is because water is present in greater quantity and serves as the medium in which the AgNO3 is dissolved.

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The chemical formula Ab28 does not correspond to a known chemical compound. It is not a recognized formula for any specific substance or compound. It is characterized by its sodium content.

A plagioclase feldspar mineral is albite. It is the plagioclase solid solution series' sodium endmember. It is a plagioclase that contains less than 10% anorthite. The formula for the endmember of pure albite is NaAlSi₃O.

The chemical formula Ab28 does not correspond to a known chemical compound. It is not a recognized formula for any specific substance or compound.

Albite is a mineral and a specific member of the plagioclase feldspar group with the chemical formula NaAlSi₃O₈. It is characterized by its sodium content. If Ab28 is intended to represent a variation or modification of albite, it would require additional details or specifications to understand the specific differences between them.

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Answer:

2.499 mol HCl

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

1.505 × 10²⁴ atoms HCl (Hydrochloric acid)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

\(1.505 \cdot 10^{24} \ atoms \ HCl(\frac{1 \ mol \ HCl}{6.022 \cdot 10^{23} \ atoms \ HCl} )\) = 2.49917 mol HCl

Step 4: Check

We are given 4 sig figs. Follow sig fig rules and round.

2.49917 mol HCl ≈ 2.499 mol HCl

The bond between the second and third phosphates is broken to release energy for use in chemical reactions.

What is ATP?

ATP is the abbreviated form of adenosine triphosphate. ATP is a nucleotide that is crucial to cellular metabolism since it serves as a way for cells to transport energy between chemical reactions.

In simple words, ATP is the molecule that our cells utilize as their primary source of energy. ATP provides the energy that our cells require to perform their everyday tasks, from moving to synthesizing complex molecules.

The energy stored in ATP is released through the breaking of the bond between the second and third phosphates, a high-energy bond. The removal of one phosphate group from ATP is referred to as hydrolysis, and it results in the formation of ADP (adenosine diphosphate) and an inorganic phosphate group.

ATP hydrolysis yields a considerable amount of energy, which is then used by the cell for various purposes.

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Heat made from compound 1 are kinetically controlled, whereas those made from benzaldehyde are not. The fluid concentration for liposomes that vaporize at 20 mL is 0.1 mm.

What alteration to the experimental setup can produce quantifiable heat variations and Kapp > K1 Dilute each and every solution. Compound 1 should be present at higher concentrations in both titrations.

Assessment of Heat Flow

Calorimetry is a method that we can employ to gauge how much heat is generated during a chemical and physical process. The quantity of heat that is transported from or to a substance is measured using calorimetry. As a result, the heat.

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The changes are classified as follows:

1: Chemical change -  The addition of the water to quicklime

2: Physical change - The melting of candle wax

3: Physical change -  The change in colour of zinc oxide from white to yellow and vice versa during heating and after cooling, respectively

4: Physical change- The dissolution of common salt

5: Chemical change - The hardening of cement by the absorption of carbon (Iv) oxide​

1: The addition of water to quicklime (slaking of lime) is a chemical change. It involves a chemical reaction between calcium oxide (quicklime) and water to form calcium hydroxide (slaked lime). This reaction is exothermic and produces heat.

2: The melting of candle wax is a physical change. It involves a phase transition from a solid state to a liquid state due to the application of heat. The chemical composition of the wax remains unchanged during this process.

3: The change in color of zinc oxide from white to yellow and vice versa during heating and cooling is a physical change. It is a reversible process caused by the alteration of the crystal structure of zinc oxide. The change in color is due to the absorption or release of energy during the heating and cooling processes, respectively.

4: The dissolution of common salt (sodium chloride) is a physical change. It involves the separation of ionic bonds between sodium and chloride ions in the solid salt and their subsequent dispersal in water. The chemical composition of the salt remains the same; it simply forms a homogeneous mixture with water.

5: The hardening of cement by the absorption of carbon dioxide (CO2) is a chemical change. It involves a chemical reaction known as carbonation, where carbon dioxide reacts with the calcium hydroxide in cement to form calcium carbonate. This reaction leads to the formation of new chemical compounds and a change in the structure and properties of the cement, resulting in its hardening or curing process.

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The ratio of octene to oxygen is 1:12.

To determine the ratio of octene (C8H16) to oxygen (O2) in the given reaction, we need to examine the balanced chemical equation. However, the equation you provided does not seem to be balanced. The coefficients for each compound must be determined to achieve a balanced equation before we can calculate the desired ratio.

Assuming you meant the combustion reaction of octene, a balanced equation would be:

C8H16 + 12O2 → 8CO2 + 8H2O

From the balanced equation, we can see that for every 1 mole of octene (C8H16), we require 12 moles of oxygen (O2) to completely react.

This means that for every 1 mole of octene, we need 12 moles of oxygen to fully combust the octene and produce the corresponding amounts of carbon dioxide (CO2) and water (H2O) as shown in the balanced equation.

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Answer:

From my view the answer is

D. Forests

Answer:

Mesosphere. This layer extends from around 31 miles (50 km) above the Earth's surface to 53 miles (85 km). The gases, including the oxygen molecules, continue to become denser as one descends. As such, temperatures increase as one descends rising to about 5°F (-15°C) near the bottom of this layer.

Explanation:

I hope this helpful♡♡ plssplss pa brainliest po ako

A LOAEL is defined as the lowest dose that demonstrates a significant increase in an observable adverse effect. The term LOAEL stands for "Lowest Observed Adverse Effect Level."

When testing chemicals and other substances for toxicity, the goal is to determine the concentration or dose at which adverse effects begin to appear. The LOAEL is the lowest dose at which an adverse effect is observed. This value can be used to establish a safe level of exposure to a substance.
To determine the LOAEL, a series of tests are conducted in which different doses of the substance being tested are administered to test animals. The animals are observed for any adverse effects, such as changes in behavior, weight loss, or organ damage. The lowest dose at which an adverse effect is observed is the LOAEL.
It is important to note that the LOAEL is a relative measure of toxicity. It only provides information on the dose at which an adverse effect is first observed and not on the severity of the effect. In addition, the LOAEL may vary depending on the species tested and other factors.
In summary, the LOAEL is the lowest dose at which an observable adverse effect is detected. This value is used to establish a safe level of exposure to a substance.

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Answer:

ml =0

Explanation:

The third quantum number of a 3s2 electron in phosphorus, 1s2 2s2 2p6 3s2 3p3 is ml=0.

The third quantum number of an \(3s^{2}\) electron in phosphorus,

\(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{3}\) will be m = 0.

Quantum numbers were also the series of data which used to express the location as well as the energy of an atom or ion.

Phosphorus is the kind of element which atomic number will be 15. and can be represented by P.

Calculation of quantum number.

The electronic configuration of P(phosphorous) is \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{3}\) .

It can be seen that 3s has only 2 electrons, hence, magnetic quantum number will be 0.

Therefore, the correct answer will be option (c).

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Explanation:

The barium – 137 cation would have 56 protons, 54 electrons and 81 neutrons.

Answer:

tempature of the person, check carbon levels in the house or place where the person is.

Explanation: