In the current periodic table, how are the elements arranged?

a. the bonding power with oxygen
b. the number of neutrons
c. atomic mass
d. atomic number

Answer:

The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

Explanation:

HOPE THIS HELP

PICK ME AS THE BRAINLIEST

Answer:

(A)

Explanation:

It decreases cuz when they start climbing a mountain there air pressure is getting low and so is their blood. The higher they go the more it decreases. Hope this helps:)!

The concentration of the Nitric acid solution : 0.114 M

Titration is a procedure for determining the concentration of a solution (analyte) by reacting with another solution whose known concentration (usually a standard solution) is called the titrant. Determination of the endpoint/equivalence point of the reaction can use indicators according to the appropriate pH range  

Titrations can be acid-base titration, depositional titration, and redox titration. An acid-base titration is the principle of neutralization of acids and bases  

Reaction

HNO₃ + NaOH → NaNO₃ + H₂O​

Concentration a standard solution  of sodium hydroxide :  0.0998 mol/dm³ , and the volume = 25 cm³

moles NaOH=

[tex]\tt mol=M\times V\\\\mol=0.0998\times 25\\\\mol=2.495~mlmoles[/tex]

From the equation, mol ratio HNO₃ : NaOH = 1 : 1, so mol HNO₃ = mol NaOH=2.495 mlmoles

The volume of HNO₃ = 21.8 cm³, so the concentration :

[tex]\tt M=\dfrac{n}{V}\\\\M=\dfrac{2.495}{21.8}\\\\M=0.114[/tex]

The concentration of the nitric acid solution is 0.11445 mol/dm³

From the question,

We are to calculate the concentration of the nitric acid solution

The given balanced chemical equation for the reaction is

HNO₃ + NaOH → NaNO₃ + H₂O​

This means 1 mole of HNO₃ is needed to completely neutralize 1 mole of NaOH

Using the formula

[tex]\frac{C_{A}V_{A} }{C_{B}V_{B}} = \frac{n_{A}}{n_{B}}[/tex]

Where [tex]C_{A}[/tex] is the concentration of acid

[tex]C_{B}[/tex] is the concentration of base

[tex]V_{A}[/tex] is the volume of acid

[tex]V_{B}[/tex] is the volume of base

[tex]n_{A}[/tex] is the mole ratio of acid

[tex]n_{B}[/tex] is the mole ratio of base

From the given information

[tex]C_{B}= 0.0998\ mol/dm^{3}[/tex]

[tex]V_{A} = 21.80 \ cm^{3}[/tex]

[tex]V_{B} = 25.0 \ cm^{3}[/tex]

From the balanced chemical equation

[tex]n_{A} = 1[/tex]

[tex]n_{B} =1[/tex]

Putting the parameters into the formula, we get

[tex]\frac{C_{A} \times 21.80 }{0.0998 \times 25.0} = \frac{1}{1}[/tex]

Then,

[tex]C_{A} \times 21.80=0.0998 \times 25.0[/tex]

∴ [tex]C_{A}=\frac{0.0998 \times 25.0}{21.80}[/tex]

[tex]C_{A} =\frac{2.495}{21.80}[/tex]

[tex]C_{A} = 0.11445 \ mol/dm^{3}[/tex]

Hence, the concentration of the nitric acid solution is 0.11445 mol/dm³

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Answer:

digestion

Explanation:

The parasympathetic nervous regulates life-sustaining processes, like digestion, during times when your body is relaxed.

Answer:

The type of bonding that occurs between metals and non metals is ionic bonding,so the type of bond between Na and Br is an ionic bond

AnswU GOT THIS!!!!!!!!!!!!!

Explanation:

Answer:

protein??

Explanation:

im not sure, but I could be wrong!!

Answer:

Option B

Explanation:

The reaction can be summarized as

6O2+C6H12O6——›6CO2+6H2O+Heat

Answer:

B

Explanation:

Answer:

D

Explanation:

The chemical reaction is most likely the slowest will be rocks are eroded by acid rain.

A chemical reaction occurs that involves the chemical change of one group of chemical compounds into another series of chemical substances.

Acid rain was the rain that has an overabundance of acids.

The chemical reaction is most likely the slowest will be rocks are eroded by acid rain.

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Answer:

The answer is c radio --> infrared --> ultraviolet --> gamma

Explanation:

I just did it

Answer:

C

Explanation:

just did it

Answer:

0.37atm

Explanation:

Given parameters:

Initial pressure  = 0.25atm

Initial temperature  = 0°C  = 273K

Final temperature  = 125°C  = 125 + 273  = 398K

Unknown:

Final pressure  = ?

Solution:

To solve this problem, we use a derivative of the combined gas law;

           [tex]\frac{P1}{T1}[/tex]  = [tex]\frac{P2}{T2}[/tex]

  P and T are pressure and temperature

  1 and 2 are initial and final values

        [tex]\frac{0.25}{273}[/tex]   = [tex]\frac{P2}{398}[/tex]  

         P2  = 0.37atm

Explanation:

The boiling point of a pure substance is the temperature at which the substance transitions from a liquid to the gaseous phase. At this point, the vapor pressure of the liquid is equal to the applied pressure on the liquid.

Answer:

got to be salt in warm water as for the bread it produces mold and also bleach is a chemical

Answer:

so since the model atom was changed as new evidence, and the plum pudding model was a ball of positive charge, the alpha particle scattering which broke up the atom

Answer: its D

Explanation: i just got the question right

In scientific notation, often known as power-of-10 notation, extremely big and small numbers are written. Scientists write very large numbers by express the numbers using scientific notation.

Numbers that are either too large or too little to be readily stated in decimal form can be expressed using scientific notation. It is also known as standard form in the UK and scientific form, standard index form, and standard form.

The main goal of scientific notation is to simplify computations using numbers that are abnormally big or tiny. The following examples demonstrate how all the digits in a number in scientific notation are relevant, since zeros are no longer utilized to set the decimal point.

When working with very big or very small numbers, scientists, mathematicians, and engineers employ scientific notation. Large and tiny numbers can be represented in a form that is simpler to read using exponential notation.

Thus, option D is correct.

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lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (FR) all have 7 energy levels

sorry if im wrong im kinda fried RN

Answer:

The answer is francium (Fr)

Explanation:

I just took the test

By definition science is, the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment.

Answer:Chemical reaction

Explanation:

The main concept that must be applied to determine the coefficients (amount of each item) is that there must be equal amounts of each element on each side of the equation. We are not destroying or creating new atoms. In this case, the unbalanced reaction formula is:

B

r

2

+

K

I

=

K

B

r

+

I

2

There are a two problems we need to solve before it will be balanced:

There are two moles of Iodine atoms (

I

) on the right side of the equation, while there is only one mole on the right side.

There are two moles of bromine (

B

r

) atoms on the left side, while there is only one on the right.

Since there are two moles of bromine atoms on the left side, we need two moles on the right as well. We can do this by adding a coefficient of two to the

'

K

B

r

'

term in the equation. Our now modified equation looks like this:

B

r

2

+

K

I

=

2

K

B

r

+

I

2

There is one mole of Iodine atoms on the left, and two on the right. To fix this, we add a coefficient of two to the

'

K

I

'

term. The resulting equation is below.

B

r

2

+

2

K

I

=

2

K

B

r

+

I

2

Bonus step: We can also put ones in front of the coefficient-less species. This is like changing a phrase from "an apple" to "1 apple". It is the exact same thing, but makes it a little more clear sometimes. This would like like this:

1

B

r

2

+

2

K

I

=

2

K

B

r

+

1

I

2

Can you see that there is now an equal amount of each element on each side of the equation? That means that it is balanced.

Answer: its a reduction and an oxidation reaction

Explanation:

Answer:

Mass = 99.875 g

Explanation:

Given data:

Number of atoms of Ar = 1.506× 10²⁴

Mass in gram = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

1.506× 10²⁴ atoms  × 1 mol / 6.022 × 10²³ atoms

0.25× 10¹ mol

2.5 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 2.5 mol × 39.95 g/mol

Mass = 99.875 g

The atom's nucleus is composed of neutrons and protons. BOTH: In the nucleus. Contribute to the mass of the atom. Mass equal 1 amu. PROTON. Number is atomic number of element. Determine the identity of the atom. NEUTRON: Neutral charge.

Subatomic particles are matter structures that are smaller in size than an atom. Hence, subatomic particles compose the atoms, determining their properties.

Many subatomic particles are unstable and remain unknown. However, three of them are the most stable ones,

Subatomic particles can be either,

Neutrons and protons compose the nucleus of the atoms, while electrons orbit around them.

These particles differ in their electric charge and their mass.

The number of protons in the atom is the atomic number and determines the atom's identity.

The massic number is the addition of the number of protons and the number of neutrons.

Atomic mass is composed of neutrons and protons mass. It is not the same as the massic number or the atomic weight.

When protons, neutrons, and electrons get together to form an atom, they lose part of their mass as energy. This is why the atomic weight is slightly inferior to the sum of masses.

1) BOTH

In the nucleus

Contribute to the mass of the atom

Mass equal 1 amu (1.67377 x 10⁻²⁷ kg or 1.67377 x 10⁻²⁴ g)

2) PROTON

Number is atomic number of element

Determine the identity of the atom

3) NEUTRON

Neutral charge

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Florine has a smaller atomic radius than oxygen

Atomic radius or Atomic Radii is the total distance from the nucleus of an atom to the outermost orbital of its electron and in the given element oxygen and Florine, Florine has the smallest atomic radius because in moving from left to right across a period, the atomic radius decreases as the effective nuclear charge increases and because of greater positive charge of the nucleus, pulling electron and electron shell in closer. therefore, the Florine has smallest atomic radius than oxygen atomic radii of oxygen is 48pm.

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A transform boundary occurs when two tectonic plates move past one another.

Tectonic Plates Movement:

The tectonic plates can be thought like the pieces of the broken or cracked shells.  The heat from radioactive processes within the planet's interior causes the plates to move,  The heat from radioactive processes within the planet's interior causes the movement of the tectonic plates.

Convergent Boundary:

Convergent boundary is that area or is that boundary from which the plates moves towards each other.

Divergent Boundary:

Divergent boundary is that boundary or area from which the tectonic plates starts moving away from each other.

Transform boundary:

The transform boundary is that boundary which causes a fault or error between the tectonic plates.

So we can conclude that a transform boundary occurs when two tectonic plates move past one another.

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Answer:

Plate tectonics...Plate comes first

Tectonic Plates... Tectonic comes first...

Answer:

plate tectonics is a scientific theory that describes the large-scale motion of Earth's lithosphere

tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust

Explanation:

56.5 grams of an unidentified material are put in a graduated cylinder. Lead is the name of the unknown material.

In order to make them lighter and less fragile than glass, large graded cylinders are typically manufactured of polypropylene due to its good chemical resistance or poly methyl pentene due to its transparency. Polypropylene (PP) is simple to repeatedly autoclave; however, autoclaving beyond 121 °C (250 °F) will warp or break polypropylene graduated cylinders, reducing accuracy (depending on the chemical composition; normal commercial grade polypropylene melts above 177 °C (351 °F)).

In order to improve the precision and accuracy of volume measurement, traditional graduated cylinders are typically tall and narrow. It has a "spout" for simple pouring of the measured liquid and a glass or plastic base (stand, foot, support). Another variation is low and wide.

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The two senses which is require in the chemical compounds be dissolved in solution before they can act as stimulants for these senses are smell and odour.

Stimulant for smell include molecules which are dissolved in the air gas easily, can be easily detected by the odour recepters which are located on the nostrils upon binding. The smell neurons transfer this information to the smell bulb which are located in the forebrain all the olfactory process occur.

The sensation of taste occur when our food is dissolved in the saliva secreted by the salivary gland located below the tongue. This food dissolved in saliva binds with the recepters of the tongue which are located on the taste buds of papillae.

Thus, we concluded that the two senses which is require in the chemical compounds be dissolved in solution before they can act as stimulants for these senses are smell and odour.

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Answer:

Answer is D. Just took the quiz on A P E X

Explanation:

If oxidation states change, it is a redox reaction. Hence, option D is correct.

Oxidation-reduction reactions are balanced by two half overall chemical equations into an oxidation equation and a reduction equation.

In redox reactions, the half-reactions of oxidation and reduction always occur simultaneously in pairs.

The oxidation half-reaction involved the loss of electrons from a reduced substance (A) to form an oxidized substance (A⁺):

A ⇒ A⁺ + e-

In contraposition, during the reduction half-reaction the oxidized substance (B⁺) gains electrons to form the reduced substance (B):

B⁺ + e- ⇒ B

The overall redox reaction is obtained by the addition of the two half-reactions:

A ⇒ A⁺ + e-

B⁺ + e- ⇒ B

A + B⁺⇒ A⁺ + B

The electrons gained by B are provided by A, which lost the same number of electrons. Thus, the oxidation/reduction reactions are paired.

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