Why is it important to have the correct atomic number when identifying an atom/element?

Answer:

the answer is 2 moles

Explanation:

in 22.4 l there is 1 mole (avogardo law) so by applying unitary method we can see that in 44.8 l there will be 2 moles of gas.

Left- and right-handed mirror image molecules are known as stereoisomers. Stereoisomers have the same molecular formula and the same connectivity of atoms, but the arrangement of the atoms in space is different. Stereoisomers are formed due to the presence of a chiral center in the molecule

A molecule is said to be chiral if it has a non-superimposable mirror image. Chiral molecules cannot be superimposed on their mirror image. This means that the left- and right-handed mirror images of a chiral molecule are not identical and are not superimposable on each other. Chiral molecules are very important in the field of biology and pharmacology because they interact differently with other chiral molecules in biological systems and can have different biological activities or therapeutic effects.Most biological molecules, such as amino acids, sugars, and DNA, are chiral. Amino acids and sugars are chiral because of the presence of an asymmetric carbon atom in their structures. DNA is chiral because of the helical structure of its double-stranded form. The handedness of chiral molecules can have significant implications for their biological activity, as the interaction between two chiral molecules can depend on their relative handedness.The study of stereoisomers is important in the field of organic chemistry and biochemistry. Understanding the stereochemistry of molecules is essential for understanding their properties and behavior. Stereoisomers can have different physical properties, such as melting point and solubility, and different biological activities, such as receptor binding and enzyme catalysis.

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answer

yes

Explanation:

Answer:

Carbon, hydrogen, oxygen, and nitrogen, with hydrogen present in the greatest proportion

Explanation:

Let's consider the chemical formula of acetaminophen: C₈H₉O₂N. According to this formula, in 1 molecule of acetaminophen there are:

As we can see, the element present in the greatest proportion by number of atoms is hydrogen.

Answer:

I think winter

Explanation:

Since n represents the number of fluorine atoms in each xefn molecule and it has to be a whole number, we round up to the nearest whole number. the value of n is 11. , There is no option for 11, but the closest option is d. 6.

The given compound contains molecules of xefn, where n is a whole number. This means that the compound has a fixed ratio of xenon and fluorine atoms and n represents the number of fluorine atoms in each molecule.
To find the value of n, we need to use the given mass and the Avogadro's number to calculate the number of xefn molecules present in the sample.
First, we need to calculate the mass of one xefn molecule:
Mass of one xefn molecule = (0.172 g) / (5.0 x 10²⁰) = 3.44 x 10⁻²² g/molecule
Next, we need to calculate the number of fluorine atoms in one xefn molecule:
Mass of one fluorine atom = 18.998 g/mol / 6.022 x 10²³ atoms/mol = 3.16 x 10⁻²³ g/atom
Mass of n fluorine atoms = n x (3.16 x 10⁻²³ g/atom) = 3.16n x 10⁻²³ g
Therefore, the mass of one xefn molecule can be written as:
Mass of one xefn molecule = mass of xenon atom + mass of n fluorine atoms
3.44 x 10⁻²² g/molecule = 131.293 g/mol / 6.022 x 10²³ atoms/mol + 3.16n x 10⁻²³ g
Simplifying and solving for n, we get:
n = (3.44 x 10⁻²² g/molecule - 2.180 x 10⁻²⁵ g/molecule) / (3.16 x 10⁻²³ g/atom)
n = 10.87
Since n represents the number of fluorine atoms in each xefn molecule and it has to be a whole number, we round up to the nearest whole number.
Therefore, the value of n is 11.
There is no option for 11, but the closest option is d. 6.

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The anthropogenic activities such as the release of carbon dioxide has contributed to climate change.

Large amounts of carbon dioxide are released into the atmosphere via the combustion of fossil fuels like coal, oil, and natural gas for energy production, transportation, and industrial activities. A greenhouse gas called carbon dioxide traps heat in the atmosphere of the Earth, causing the greenhouse effect and global warming.

Large forested areas have been lost as a result of deforestation, which is mostly caused by logging, urbanization, and agricultural development. As part of their photosynthesis, trees serve as carbon sinks by absorbing carbon dioxide.

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Answer:

option 1

Explanation:

i had a test with same question

The Lewis structure for BrF4- can be drawn as follows:



In this structure, the Br atom is surrounded by four F atoms and one lone pair of electrons. This gives the Br atom a total of five electron domains, which corresponds to the sp3d hybridization.

Therefore, the correct answer is (b) sp3d.

To summarize, the hybridization on the Br atom in BrF4- is sp3d because it has five electron domains (four bonding domains from the F atoms and one non-bonding domain from the lone pair of electrons).

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Answer:

C2H5OH + Na = C2H5ONa + H2 - Single replacement reaction

AgCl + HNO3 = AgNO3 + HC - Double replacement reaction

N2 + H2 = NH3 - Combination reaction

MgCO3 = MgO + CO2  - Decomposition reaction

Explanation:

Single replacement reaction - The type of reaction in which one strong ion replaces the weak ion from the solution.

For example: C2H5OH + Na = C2H5ONa + H2

Double replacement reaction - The reaction in which two compounds in a solution reacts by interchanging their ions and forms a new product.

For example: AgCl + HNO3 = AgNO3 + HCl

Combination reaction - The type of reaction in which two or more compounds combine together to form a single compound.

For example: N2 + H2 = NH3

Decomposition reaction - The type of reaction in which only one compounds break down into two or more new compounds.

For example: MgCO3 = MgO + CO2

Hence, the correct answer is:

C2H5OH + Na = C2H5ONa + H2 - Single replacement reaction

AgCl + HNO3 = AgNO3 + HC - Double replacement reaction

N2 + H2 = NH3 - Combination reaction

MgCO3 = MgO + CO2  - Decomposition reaction

Atoms transfer or share electrons to obtain octet (option C).

Octet rule in chemistry refers to a rule stating that atoms lose, gain, or share electrons in order to have a full valence shell of 8 electrons.

Hydrogen is excluded from this rule because it can hold a maximum of 2 electrons in its valence shell.

During chemical reactions, atoms of elements combine with other atoms and lose, gain or share their electrons so as to obtain this octet state of electrons.

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Answer: Magnet

Explanation:Using a magnet is the best separating technique to be deployed in this case. The nails are easily picked out by just holding a magnet over the sandbox.

Answer:

2C₂H₆ + 7O₂ -> 4CO₂ + 6H₂O

Explanation:

Reactants:

4 C

12 H

14 O

Products:

4 C

12 H

14 O

The reaction is balanced.

Answer:

1. 0.5333333m (Calculator Soup Work Calculator)

2.

9. 29.1666666667% efficient

10. 44.5% efficient

Explanation:

will do other answers later

a) The absolute pressure at point B cannot be determined based on the given information.

b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable with the provided information.

a) The absolute pressure at point B cannot be determined because the information about the liquid levels or the densities of the liquids in the tank is not provided.

The absolute pressure depends on the height of the liquid column and the density of the liquid, which are missing from the given data. Without this information, it is not possible to calculate the absolute pressure at point B.

b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable. To calculate the relative pressure, we need to know the absolute pressure at point F and subtract the atmospheric pressure.

However, the absolute pressure at point F is not given, so we cannot determine the relative pressure. Additionally, the value of atmospheric pressure (Patm) provided is not relevant to calculating the relative pressure at point F.

In order to determine the absolute pressure at point B or the relative pressure at point F, we would need additional information such as the liquid levels in the tank, the densities of the liquids, and possibly the atmospheric pressure at point F.

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Answer:

Constant volcanic eruptions Hope this helps!

A train is traveling at 50.0 miles per hour. 1 mile is equal to 1.61 kilometers then the train would be moving with a speed of  22.3472 metes / seconds.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem we have to find the speed of the train traveling at 50.0 miles per hour,

1 mile = 1609 meters

50 miles = 50 ×1609 meters

               =80450 meters

1 hour = 3600 seconds

The speed of train in meters / seconds = 80450 / 3600 seconds

                                                                 =22.3472 metes / seconds

Thus, the speed of the train would be 22.3472 metes / seconds.

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Calcium Chloride would have a charge of +2

Hopes this helps :)

Answer:

your brain spinal cord and nerves

One term that applies to eosin methylene blue (EMB) agar is "methylene blue." Methylene blue is a vital ingredient in EMB agar as it is responsible for inhibiting the growth of Gram-positive bacteria, while allowing the growth of Gram-negative bacteria.

It accomplishes this by entering the bacterial cell and binding to its DNA, interfering with the cell's metabolic processes and leading to its death. The presence of methylene blue in EMB agar allows for the differentiation between Gram-negative and Gram-positive bacteria based on their ability to grow in the presence of the dye. Another term that applies to EMB agar is "ingredient." EMB agar is a microbiological culture medium that contains a variety of ingredients that are essential for the growth and differentiation of bacteria. In addition to methylene blue, EMB agar contains eosin Y, which acts as a pH indicator and allows for the identification of lactose-fermenting bacteria. It also contains peptone, a source of nitrogen and carbon, and agar, which provides a solid surface for bacterial growth. The combination of these ingredients allows for the selective growth of Gram-negative bacteria, such as fecal coliforms, and the identification of lactose-fermenting bacteria. In summary, methylene blue and ingredient are both applicable terms when discussing EMB agar. Methylene blue is a critical component that allows for the differentiation of Gram-negative and Gram-positive bacteria, while ingredient refers to the various components that make up EMB agar and are necessary for its function.

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Answer:

I think the answer is false

Answer: 2.48×10^-17 J

Explanation:

Given the following :

Wavelength = 8nm (8 x 10^-9 m)

Energy(e) of X-ray =?

Energy=[speed of light(c) × planck's constant (h)] ÷ wavelength

Speed of light = 3×10^8m/s

Planck's constant = 6.626×10^-34 Js

Wavelength = 8 x 10^-9 m

Energy = [(3×10^8) * (6.626×10^-34)] / 8 x 10^-9

Energy = [19.878×10^(8-34)] / 8 x 10^-9

Energy = 2.48475 × 10^(-26+9)

Energy = 2.48×10^-17 J

Answer: 2.48×10^-17 J

Explanation: a pex

Answer:

metals donate electrons to nonsmetals

Answer:

So, the elements with similar properties to sodium (Na) are all of those elements in the same Group.

Explanation:

The ones "most" similar would be the ones closest in mass as well. Those would be Lithium (Li) and Potassium (K).

Answer:A) N and P

Explanation:

N and P, because they are in the same group on the periodic table. This is because they both have 3 valence electrons, and properties of elements are dependent partly on the number of valence electrons they have.

Answer:

B.

Explanation:

An ammonia solution contains only a few ions, and it conducts electricity only poorly.

Answer:

The RMM of Ca (OH)2 is

40+ (16+1)2

40+(17)2

40+34

74

The RMM of Al2SO4 is

(27×2)+32+(16×4)

54+32+64

=150

Explanation:

Note that the RAM of:

Ca=40

O=16

H=1

Al=27

S=32