If the standardization of 25. 00 ml naoh solution by khp consumed 12. 30 ml of 0. 1 m titrant, what is the concentration of the naoh solution?.

The electron configuration of an atom or ion is the arrangement of electrons in the orbitals of the atom or ion. It is represented by a list of occupied atomic orbitals in order of increasing energy, with the number of electrons in each orbital given in superscript. The electron configuration of an atom or ion can be used to predict its chemical behavior and reactivity. It is determined by the number of protons in the nucleus, which determines the number of electrons in the atom or ion, and the arrangement of these electrons in the atomic orbitals. The electron configuration of an atom or ion is written using the Periodic Table and the principles of quantum mechanics.

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Answer: C

Explanation: because mass number = proton + neutron number and atomic number = proton number

so 16-8=8

Answer:

C. 8

Explanation:

number of neutrons = mass number - atomic number

16-8

8

Answer:

The three-point test

Explanation:

The three-point test refers to a ground test utilizing an auxiliary current electrode and an auxiliary potential electrode.

There is no direct involvement of \(Cu(NO_3)_2\) in the mole ratio calculation as it is not a reactant with \(AgNO_3.\)

The balanced chemical equation for the given reaction is:

\(2AgNO_3 + Cu -- > Cu(NO_3)_2 + 2Ag\)

According to this equation, the mole ratio between \(AgNO_3\) and Cu is 2:1, which means that for every 2 moles of \(AgNO_3\) used, 1 mole of Cu is consumed.

There is no direct mole ratio between \(AgNO_3\) and \(Cu(NO_3)_2\) or between \(AgNO_3\) and Ag. However, we can calculate the mole ratio between \(AgNO_3\) and Ag using the stoichiometric coefficients in the balanced equation.

For every 2 moles of \(AgNO_3\) used, 2 moles of Ag are produced. Therefore, the mole ratio between \(AgNO_3\) and Ag is 2:2 or simply 1:1.

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13.015  grams of acetylene (C2H2) are required to produce 1.0 moles of CO2.

To find the number of grams of acetylene (C2H2) required to produce 1.0 moles of CO2, we can use the balanced equation for the combustion of acetylene: 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)

From the balanced equation, we know that for every 2 moles of C2H2 that react, 4 moles of CO2 are produced. Therefore, if we want to produce 1.0 moles of CO2, we need to react 1.0 moles of CO2 / 4 moles CO2/ 2 moles C2H2 = 0.5 moles of C2H2.

To convert moles to grams, we use the molar mass of C2H2 which is 26.03 g/mol

So, 0.5 moles of C2H2 = 0.5 x 26.03 g/mol = 13.015 g C2H2

Therefore 13.015  grams of acetylene (C2H2) are required to produce 1.0 moles of CO2

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(d). In the body, trans-fatty acids are metabolized more like saturated fats than like unsaturated fats" best describes a feature of cis-fatty acids and trans-fatty acids.  trans-fatty acids and cis-fatty acids have different features.

Trans-fatty acids have double bonds that are in the trans configuration, while cis-fatty acids have double bonds in the cis configuration. In nature, most double bonds are in the cis configuration, but the process of hydrogenation can convert cis-fatty acids to trans-fatty acids. The conversion of cis-fatty acids to trans-fatty acids is not inhibited by the presence of antioxidants, as they do not affect the chemical process of hydrogenation.

In the body, trans-fatty acids are metabolized more like saturated fats than like unsaturated fats. This is because trans-fatty acids have a linear structure that allows them to pack tightly together, making them solid at room temperature and less easily broken down by enzymes. This can lead to an increased risk of heart disease and other health problems. In contrast, cis-fatty acids have a bent structure that makes them more fluid and easier to break down in the body. Overall, it is important to limit consumption of trans-fatty acids in order to maintain good health.

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I do not know, i just need points :/

Answer: 26.07 g Zn if need to correct sig figs its 26 g Zn

Explanation:

use stoichiometry to solve

2.4 X 10^23 atoms Zn X (1mole Zn / 6.02 X 10^23 atoms Zn) X (65.38 g Zn/ 1 mole Zn) =

26.07 g Zn

The emitted fluorescent light has longer wavelength and lower energy because it lost some energy to the solvent molecules and some fraction of energy is dissipated as heat.

A material that has absorbed light or other electromagnetic radiation will emit light when it undergoes fluorescence. It has a luminescent quality. Most of the time, the emitted light has a lower photon energy than the absorbed radiation because it has a longer wavelength.

Fluorescence can be seen when the emitted light is in the visible spectrum while the absorbed radiation is in the ultraviolet (UV) region of the electromagnetic spectrum, which is invisible to the human eye.

The fluorescent photons have lower energy. The non-radiative  vibrational transitions taking place in between causes dissipation of energy as heat and some energy is transferred to the solvent molecules.

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Answer:

6

6

2,4

12.01070 unit

6 neutron

2 energy levels

Explanation:

Potassium oxide is an ionic compound formed by combining potassium and oxygen. It carries the chemical formula K2O. Potassium cannot be found free because it is too reactive. It has valency +1 and combines readily with oxygen atoms forming K2O.

Answer:

The Correct answer is

K+O2------>K2O

balancing it will be

4K+O2----->2K2O

Answer:

Lattice energy is an estimate of the bond strength.

Based on the given information, the most appropriate vaccine to recommend for Lany would be Tdap (Tetanus, Diphtheria, and Pertussis) vaccine.

Here's the reasoning:

Lany is 68 years old: Tetanus and diphtheria are serious bacterial infections that can affect individuals of any age. Therefore, protection against these diseases is important for Lany.

Lany has a new grandchild on the way: Pertussis, commonly known as whooping cough, is a highly contagious respiratory infection that can be severe in infants. By receiving the Tdap vaccine, Lany can help prevent transmitting pertussis to the newborn baby.

Lany received a Td vaccine approximately 13 years ago: Td vaccine provides protection against tetanus and diphtheria, but not pertussis. Since Lany's last vaccination was 13 years ago, it is recommended to update the vaccination to include pertussis (Tdap).

Therefore, to ensure comprehensive protection against tetanus, diphtheria, and pertussis, the most appropriate recommendation would be the Tdap vaccine.

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Answer:

268ml

Explanation:

What would the volume of a gas be at -150C, if it has volume of 693ml at 45.0C?

V and T are related as V =kT

first, change all C into K since these are gas laws!

45C =45+273 =318K

-150C =-150+273 =123K

now 693ml=kX318

so k=693/123 =2.18

so new V=2.18 X 123=268ml

An increase of 0.10 bar in atmospheric pressure raises the boiling point of water by approximately 0.5 Kelvin.

An increase of 0.10 bar in atmospheric pressure can bring about a change in the boiling point of water. The change can be calculated using the following equation:ΔT = Kbp x mΔT = change in boiling pointKbp = boiling point elevation constantm = molalitySince water is the solvent, its boiling point elevation constant is 0.512 °C/m. Thus, an increase of 0.10 bar in atmospheric pressure can cause a change in boiling point, which can be calculated as follows:ΔT = Kbp x m= 0.512 °C/m x 0.10 bar/m = 0.0512 °CThe boiling point of water is 100 °C at atmospheric pressure. By adding 0.0512 °C, the new boiling point is obtained:100 °C + 0.0512 °C = 100.0512 °CThe change in boiling point can be converted to Kelvin using the following formula:T(K) = T(°C) + 273.15K= 100.0512 + 273.15= 373.20 KelvinThus, an increase of 0.10 bar in atmospheric pressure can cause the boiling point of water to rise to 373.20 Kelvin.

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The list appears to be a chronological order of famous scientists and chemists. Here's the order from earliest to latest:

Generally, Robert Boyle (1627-1691): Irish chemist and physicist, known as the founder of modern chemistry.

Hennig Brand (c. 1630 – c. 1710): German alchemist and the discoverer of phosphorus.

Marie Curie (1867-1934): Polish-born physicist and chemist, famous for her pioneering research on radioactivity and the first woman to win a Nobel Prize.

John Newlands (1837-1898): English chemist who developed the concept of the periodic table of elements.

J.J Thomson (1856-1940): English physicist who discovered the electron and isotopes.

Lothar Meyer (1830-1895): German chemist who independently developed the concept of the periodic table around the same time as Dmitri Mendeleev.

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Answer:

nucleus

Explanation:

Explanation:

The lungs pump oxygen in and carbon dioxide out, which goes through the blood stream to help with the cell's energy needs.

Nutrients pass through the blood stream as well. The nutrients start with the digestive system (mouth, esophagus, stomach, small intestine) before going into the blood stream. The nutrients are building blocks to help make new cells when old ones die off.

When those cells die off, the body sheds them like dead skin, but internal dead cells are passed off as waste. This waste and other byproducts the body doesn't need passes through the blood stream as well.

In short, the blood stream is basically the highway to help get desired materials (eg: oxygen and nutrients) and get rid of waste (eg: carbon dioxide and other unwanted byproducts or dead cell material)

So that's why the answer includes A, B and C.

To estimate the number of ladybugs in the entire garden, Ajoy needs the dimension of the garden.

Dimensions in mathematics are the measure of the size or distance of an object or region or space in one direction.

Dimensional measurement is of fundamental importance for interchangeability and global trade.

Hence, to estimate the number of ladybugs in the entire garden, Ajoy needs the dimension of the garden.

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Answer:

Method: Measure out 25 cm3 of 0.5 mol dm3 lead(II)nitrate solution and add it to a small beaker. Measure out 25 cm3 of 0.5 mol dm3 of potassium sulfate add it to the beaker and mix together using a stirring rod.

Answer:

1.41 x 10 ^4

Explanation:

change atoms to mol then to gram

5 x 10^25 atoms of AgNO3 \(\frac{1mol AgNO3}{6.023 x 10 ^23}\)\(\frac{169.91g}{1mol AgNO3}\)

= 141.05g x 10^2 move the decimal over if you are doing sig fig 1.41 x 10^4

change atoms to mol using Avogadro's number 6.023 x 10^23 then mol to gram using the molar mass of AgNO3.

In the Lewis structure of methanol (CH3OH), the OH group is placed on the outside because it is an important functional group that influences the chemical properties and reactivity of the molecule.

The Lewis structure is a representation of a molecule that shows the arrangement of atoms and valence electrons. In methanol, carbon (C) is the central atom bonded to three hydrogen (H) atoms and one oxygen (O) atom. The oxygen atom forms a single bond with carbon and also has two lone pairs of electrons.

The placement of the OH group (hydroxyl group) on the outside of the Lewis structure is significant because it determines the chemical behavior of methanol. The OH group consists of an oxygen atom bonded to a hydrogen atom and represents the presence of an alcohol functional group.

In organic chemistry, functional groups are specific arrangements of atoms within a molecule that give rise to characteristic chemical reactions and properties. The presence and position of functional groups can greatly influence the behavior and reactivity of a compound. In the case of methanol, the hydroxyl group provides the molecule with its characteristic properties.

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To obtain the density of her rocks, Wendy had to take measurements of mass and volume of the rocks.

Density is defined as mass per unit volume. Wendy wanted to obtain the density of the rocks hence she had to measure the mass and the volume of the rock.

The mass of the rocks is measured using a weighing balance while the volume of the rocks is obtained by water displacement method.

The density is now obtained as;

Density = Mass/volume  for each rock sample.

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Answer:

Silver 0.237 J/g °C

Explanation:

We know that the heat required to raise the temperature of a given mass of a substance through a given temperature rise is given by;

H = mcθ

Where;

m = mass of the body

c = specific heat capacity of the body

θ = temperature rise

10.1 J = 2.8 g * c * (36°C - 21°C)

c = 10.1 J /  2.8 g * (36°C - 21°C)

c = 0.24 J/g °C

Answer:

it should be +0.46 :)

Explanation:

I just took the test and got it right.

Answer:

I think it's +1.14 V, but don't take my word for it..

Answer:

1.15 moles H₂

Explanation:

To find the moles of H₂ gas, you need to use the Ideal Gas Law equation. The equation looks like this:

PV = nRT

In this equation,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Constant (0.08206 L*atm/mol*K)

-----> T = temperature (K)

Before you can plug the given values into the equation and simplify, you need to convert Celsius to Kelvin.

P = 0.923 atm                     R = 0.08206 L*atm/mol*K

V = 29.6 L                           T = 17.0 °C + 273.15 = 290.15 K

n = ? moles

PV = nRT

(0.923 atm)(29.6 L) = n(0.08206 L*atm/mol*K)(290.15 K)

27.3208 = n(23.809709)

1.15 = n

The region of the atmosphere that is so evenly mixed that it behaves as if it were a single gas is called the homosphere.

The homosphere is the region of the Earth's atmosphere where the composition of gases remains relatively constant and well-mixed. In this region, gases are thoroughly mixed by atmospheric circulation, diffusion, and other processes, resulting in a relatively uniform composition throughout.

In the homosphere, the main gases present include nitrogen (N2), oxygen (O2), and trace amounts of other gases such as carbon dioxide (CO2), argon (Ar), and water vapor (H2O). These gases are distributed fairly evenly and do not exhibit significant variations in concentration with altitude.

The homosphere extends from the Earth's surface up to an altitude of approximately 80-100 kilometers (depending on various factors such as latitude and solar activity). Within this region, temperature and pressure decrease with increasing altitude, but the composition of gases remains relatively constant.

Above the homosphere, there is a transition region known as the heterosphere, where the composition of gases begins to stratify based on their molecular weights. In the heterosphere, lighter gases such as hydrogen (H2) and helium (He) are more abundant at higher altitudes due to their lower molecular weights.

Understanding the homosphere and its well-mixed nature is important for studying atmospheric processes, including air pollution, climate change, and the distribution of gases essential for life on Earth.

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Answer:

2 and 5

Explanation: