what is the number of protons neutrons and electrons in an ion with atomic number 53 mass number 108 and a charge of -1

The phosphodiester bonds contains a sugar attached to a phosphate group. Since one outermost phosphate is used to form a phosphate bond everytime, from a precursor containing innermost radiolabelled phosphate, the third phosphate groups will be radioactive in nature. So correct answer is 3.

Hope that helps!

Answer: Option (a) is the correct answer.

Explanation:

The stream that flows during or after the rainfall is called an ephemeral stream. This stream occurs in areas where there is less rainfall or deficiency of moisture.

The stream that flows only in flat lands is called as river.

Mechanical weathering results in the breaking of rocks causes ice wedging.

Chemical weathering results in the change in molecular structure of rocks and soil.

Thus, it can be concluded that option (a) is the correct answer.

Answer:

[H₃O⁺] = 6.31 x 10⁻² mol·L⁻¹

Explanation:

pH = -log[H₃O⁺], so [tex][\text{H}_{3}\text{O}^{+}] = 10^{- \text{pH}} \text{ mol/L}[/tex]

[tex][\text{H}_{3}\text{O}^{+}] = 10^{-1.20}\text{ mol/L} = 6.31 \times 10^{-2}\text{ mol/L}[/tex]

Answer:

[tex]6.31*10^{-2}[/tex]

Explanation:

Hello! To calculate the pH we have the following formula:

ph = -log [H3O +]

In this case we have the pH value so the formula is

[H3O +] =  [tex]10^{-pH}[/tex]

[H3O +] =  [tex]10^{-1.2}[/tex]

We use the inverse of the log

[H3O +] = [tex]6.31*10^{-2}[/tex]

So the correct answer is [tex]6.31*10^{-2}[/tex]

Answer : If it loses 2 electrons, the net charge on the atom will be (+2) and If it gains 4 electrons, the net charge on the atom will be (-4).

Explanation :

We are given:

Number of electron in an atom = 9

Number of protons in an atom = 9

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

An ion is formed when an atom looses or gains electron.

When an atom looses electrons, it will form a positive ion known as cation.

When an atom gains electrons, it will form a negative ion known as anion.

According to the question,

When the atom loses 2 electrons then the net charge on the atom will be (+2) because it will form a positive ion by losing electrons.

When the atom gains 4 electrons then the net charge on the atom will be (-4) because it will form a negative ion by gains electrons.

Hey there!:

Number of moles of iron:

Molar mass iron:  55.85 g/mol

0.676 / 55.85 => 0.012 moles of iron

Number of moles of fluorine:

Molar mass fluorine : 19 g/mol

0.460 / 19 => 0.024 moles of fluorine

Number of moles of water:

Molar mass water : 18.02 g/mol

0.870 / 18.02 => 0.048 moles of water

Simplest  mol ratio is :

iron ( Fe ) = 0.012 / 0.012 => 1.0 mol

Florine ( F ) = 0.024 / 0.012 => 2.0 moles

Water ( H2O ) = 0.048 / 0.012 =>  4 moles

Therefore:

Empirical formula is:

FeF2.4H2O

Hope that helps!

Answer : The correct option is, (C)  [tex]2.57\times 10^{24}[/tex]

Solution for Part 1 : Given,

Mass of [tex]K_2S[/tex] = 235 g

Molar mass of [tex]K_2S[/tex] = 110.262 g/mole

First we have to calculate the moles of [tex]K_2S[/tex].

[tex]\text{Moles of }K_2S=\frac{\text{Mass of }K_2S}{\text{Molar mass of }K_2S}=\frac{235g}{110.262g/mole}=2.13moles[/tex]

Now we have to calculate the number of atoms of potassium in the given compound.

In the given compound, there are 2 atoms of K and 1 atom of S.

As, 1 mole contains [tex]2\times 6.022\times 10^{23}[/tex] number of potassium atoms

So, 2.13 moles contains [tex]2.13\times 2\times 6.022\times 10^{23}=2.57\times 10^{24}[/tex] number of potassium atoms

Therefore, the number of potassium atoms in given compound is,  [tex]2.57\times 10^{24}[/tex]

Explanation for Part 2 :

Statement 1 : A balloon shrinks when it's taken outside in the winter.

This statement follow the Charles's law. There is a direct relation between the temperature and volume. As the temperature decreases, the volume also decreases and vice-versa.

Statement 2 : A closed, flexible container expands when it's heated.

This statement follow the Charles's law. There is a direct relation between the temperature and volume. As the temperature increases, the volume also increases and vice-versa.

Statement 3 : When the size of an air chamber is increased, the air pressure decreases.

This statement follow the Boyle's law. There is an inverse relation between the pressure and volume. As the pressure decreases, the volume increases and vice-versa.

Statement 4 : Pressing on an inflated balloon decreases its size.

This statement follow the Boyle's law. There is an inverse relation between the pressure and volume. As the pressure increases, the volume decreases and vice-versa.

Statement 5 : A balloon expands when air is blown into it.

This statement follow the Avogadro's law. There is a direct relation between the number of moles of gas and volume. As the number of moles of air increases, the volume also increases and vice-versa.

Answer:

2.57 x 10^24

Explanation:

This is correct! :)

Explanation : Gases, unlike solids and liquids, have neither fixed volume nor shape. They are molded entirely by the container in which they are held. We have three variables by which we measure gases: pressure, volume, and temperature. ... From this, we derive the molar volume of a gas (volume/moles of gas).

Answer : The volume is determined by the pressure, the amount of gas present, and the temperature.

The x number in ^x indicates the number of electronics in an obit, e.g. 1s^2 means there are 2 electrons in the 1s orbit.

Total number of electrons in A = 2 + 2 + 6 +2 + 6 + 2 + 2

= 22

VALENCE electrons are those in the outer most shell.

In A, there are 4s^2 + 4p^2: 2 + 2 = 4

Answer should be C instead. So sorry for the mistake earlier!

Example A: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 4p^2

counting e-:    2       2        6      2       6       2      2

2+2+6+2+6+2+2 = 22

ans is A. 22

Hey there!:

Using relation:

Δt = Kf  * m

For water , Kf = 1.86 K/molal

Putting values:

Δt = 1.86 * 0.24

Δt = 0.446

So , Freezing point = - 0.446ºC

Answer A

Hope that helps!

The depression in freezing point here for the sugar solution is 0.466 degree Celsius. Hence the freezing point of the sugar solution is  -0.446. Hence, option A is correct.

Freezing point of a solution is the temperature at which the solution changes from liquid to solid state.

To determine the freezing point of a solution of sugar dissolved in water, we need to use the freezing point depression equation:

ΔTf = Kf × molality

where ΔTf is the change in freezing point, Kf is the freezing point depression constant for the solvent (water in this case), and molality is the concentration of the solution expressed in moles of solute per kilogram of solvent.

Assuming a Kf of 1.86 °C/m for water, and a molality of 0.24 m for the sugar solution, we can calculate the change in freezing point:

ΔTf = 1.86 °C/m × 0.24 m = 0.4464 °C

This means that the freezing point of the solution will be lowered by 0.4464 °C compared to the freezing point of pure water. Since the freezing point of pure water is 0 °C, the freezing point of the sugar solution will be:

0 °C - 0.4464 °C = -0.4464 °C

Therefore, the freezing point of the solution is approximately -0.4464 °C, which is closest to option A. -0.446.

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The correct answer is 230 mmHg.

When liquid water boils at 100°C, the water vapor pressure is 760 mmHg

Hence, when liquid water boils at 50°C, the water vapor pressure is (760/2) mmHg or 230 mm Hg.

As the boiling temperature of water halves so does the vapor pressure of water. This is in accordance to Pressure Law.

According to Pressure law, pressure is directly proportional to the absolute temperature, at constant volume.

Answer:

230 mmHg

Explanation:

Answer : The specific heat of metal is, [tex]0.261J/g^oC[/tex]

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

[tex]q_1=-q_2[/tex]

[tex]m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)[/tex]

where,

[tex]c_1[/tex] = specific heat of unknown metal = ?

[tex]c_2[/tex] = specific heat of water = [tex]4.18J/g^oC[/tex]

[tex]m_1[/tex] = mass of unknown metal = 29.950 g

[tex]m_2[/tex] = mass of water = 50.0 g

[tex]T_f[/tex] = final temperature of water = [tex]27.7^oC[/tex]

[tex]T_1[/tex] = initial temperature of unknown metal = [tex]100^oC[/tex]

[tex]T_2[/tex] = initial temperature of water = [tex]25.0^oC[/tex]

Now put all the given values in the above formula, we get

[tex]29.950g\times c_1\times (27.7-100)^oC=-50.0g\times 4.18J/g^oC\times (27.7-25.0)^oC[/tex]

[tex]c_1=0.261J/g^oC[/tex]

Therefore, the specific heat of metal is, [tex]0.261J/g^oC[/tex]

I believe the answer to this is true.

Answer:-  4.6 atm.

Solution:- In this problem, the volume is constant and the pressure is changing as the temperature is changed. It's based on Gay-Lussac's law which states that, "At constant volume, pressure of the gas is directly proportional to the kelvin temperature."

The equation used for solving the problems based on this law is:

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

Where, [tex]P_1[/tex] is initial pressure and [tex]P_2[/tex] is final pressure.

Similarly, [tex]T_1[/tex] is initial temperature and [tex]T_2[/tex] is final temperature.

[tex]P_1[/tex] = 3.0 atm

[tex]T_1[/tex] = 100.0 + 273 = 373 K

[tex]T_2[/tex] = 300.0 + 273 = 573 K

[tex]P_2[/tex] = ?

Let's plug in the values in the equation and solve it for final pressure:

[tex]\frac{3.0atm}{373K}=\frac{P_2}{573K}[/tex]

[tex]P_2=\frac{(3.0atm*573K)}{373K}[/tex]

[tex]P_2=4.6atm[/tex]

So, the pressure of the gas at higher temperature is 4.6 atm.

Initial temperature of the gas = 100.0°C + 273 = 373 K

Initial pressure of the gas = 3.0 atm

Final temperature of the gas = 300.0°C + 273 = 573 K

According to Pressure Law,

P₁/T₁ = P₂/T₂

where P₁ and T₁ are the initial pressure and temperature respectively, and P₂ and T₂ are the final pressure and temperature respectively.

Plugging in the given data in Pressure Law we have,

3.0 atm/ 373 K = P₂/573 K

P₂ = (3.0 atm x 573 K)/ 373 K

P₂ = 4.6 atm

Thus, the pressure of the gas at the higher temperature is 4.6 atm.

Well as an spontaneous reaction will have a negative gibbs free energy (delta g) and a positive e cell and also the E cell is also measured in V, then your answer is the first one: ΔG = –295kJ, E°cell = +1.53 v. Hope this works

condensation

Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.

Condensation is the reverse of vaporization.

Answer:

Condensing...

Explanation:

The 4 water cycles,  evaporation, condensation, precipitation and collection, are what is happening here...... at least one of them. Condensation is when "water which collects as droplets on a cold surface when humid air is in contact with it" as defined in the dictionary or in this case, when a subject is changing from a vapor to a liquid. I hope this helps!  

The molar mass is the sum of the mass of all the atoms of a particular molecule.

The unit  of molar mass is grams per mole.

The atomic mass of H = 1.00

The atomic mass of N = 14.00

The molar mass of ammonia = atomic mass of N + 3 x (atomic mass of H)

                                                = 14.00 + 3 x (1.00) = 17.00

Therefore the molar mass of ammonia is 17g/mol

The correct answer is  17g/mol.

Immigration is the movement of organisms into a population, increasing its size and growth rate. Emigration is the movement out of a population. Carrying capacity is the maximum population size that the environment can sustain. Hence, option A, immigration, is correct.

The movement of organisms into a range is called immigration. Immigration is the movement of individuals into a population from other areas, which increases the population size and growth rate. In contrast, emigration refers to the movement of individuals out of a population's range. When an animal migrates, it does so because it can find resources there or because the habitat is a good fit for it. When an animal emigrates, it signifies that its natural habitat is no longer good for it and that it must find a new one. The definition of population change is a shift in the proportions of the various groups of people that make up a population. Carrying capacity is related to population size as well, but it describes the maximum number of individuals of a species that the environment can support, not the movement into a range. Thus, the correct answer to the question is A. immigration.

The option B is correct option. Which is release of heat and/or light energy .

According to the definition of exothermic reaction :

An exothermic reaction is a chemical reaction that releases energy by light or heat.

From definition option B (release of heat and/or light energy) indicates that an exothermic reaction has taken place.

.

Answer: Option (B) is the correct answer.

Explanation:

An exothermic reaction is defined as the chemical reaction in which there occurs release of heat.

For example, [tex]A + B \rightarrow AB + Heat[/tex]

In an exothermic reaction, energy of reactants is more than the energy of products.

Whereas an endothermic reaction is defined as a chemical reaction in which heat is absorbed by reactant molecules.

For example, [tex]A + B + Heat \rightarrow AB[/tex]

In endothermic reaction, energy of reactant molecules is less than the energy of products.

Thus, we can conclude that release of heat and/or light energy indicates that an exothermic reaction has taken place.

Answer:

Arsenic has a more nonmetallic behavior than antimony because arsenic's atoms have fewer electron shells.  

Explanation:

The molecular mass is the sum of the atomic masses of the atoms.

Atomic mass :

H = 1.01 amu

Cl = 35.45 amu

HCl = 1.01 + 35.45

HCl = 36.46 grams/mole

Therefore:

1 mole of HCl is equivalent to 36.46 grams/ mole

answer C

Answer:

it's first I don't know why that dude has such a low rating I got it correct from his/her answer.

Explanation:

I believe the answer is "Bohr's model explains the chemical behavior of all atoms."

Isopropanol spread on a table will form a layer that evaporates quickly and may cool the surface or damage materials sensitive to alcohol. It is also flammable, creating a fire risk near open flames or heat sources.

When isopropanol is poured out of its container onto a table, it behaves similarly to how water or other liquids would behave. Due to its low viscosity, isopropanol will spread out across the table's surface, forming a thin layer.

Since isopropanol evaporates much faster than water at room temperature, it would begin to evaporate quickly, leaving behind a cool sensation due to the evaporation process removing heat from the surroundings. If the table is made of a material that can be degraded by alcohol, such as certain plastics or finishes, the isopropanol may also cause damage to the table's surface.

Furthermore, it's important to note that isopropanol is flammable, so if it is poured near an open flame or a heat source, there is a risk of ignition. Therefore, handling isopropanol should be done with caution, and proper ventilation should be ensured to prevent the build-up of flammable vapors.

Answer: The correct answer is Option 1.

Explanation:

A double displacement reaction is defined as the reaction in which exchange of ions takes place. The general equation for the reaction follows:

[tex]AB+CD\rightarrow AD+CB[/tex]

During this reaction, one of the product formed is always a salt.

A gas is formed in a single displacement reaction and not in double displacement reaction.

A precipitate is formed in some of the double displacement reaction.

Water is formed in neutralization reaction when an acid reacts with a base to produce a salt and water.

Hence, the correct answer is Option 1.

Answer:

a salt

Explanation:

The two-word phrase that best describes the shape of the fluoroform molecule is ;  Tetrahedral

Fluoroform is a chemical compound represented by the formula CHF₃ which falls within the class of haloforms. The center atom in a fluoroform molecule is the carbon atom which has ( 3 ) C - F bonding and ( 1 ) C - H bonding.  This means that the number of electrons is in a fluorocarbon is 4, hence according to VSEPR theory  the geometry of the fluoroform molecule will be Tetrahedral.

Hence we can conclude that The two-word phrase that best describes the shape of the fluoroform molecule is ; Tetrahedral

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The shape of the fluoroform molecule is trigonal pyramidal.

The shape of the fluoroform molecule is trigonal pyramidal.

A trigonal pyramidal shape occurs when a central atom is bonded to three other atoms and has one lone pair of electrons. In the case of fluoroform (CHCl3), the central carbon atom is bonded to three fluorine atoms and has one lone pair of electrons, resulting in a trigonal pyramidal shape.

Other examples of molecules with trigonal pyramidal shape include ammonia (NH3) and phosphine (PH3).

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Final answer:

Homeostasis is the process by which the body maintains constant conditions. The body strives to keep temperature, blood glucose level, and blood pH constant. Disruptions to these can be countered by physiological responses to restore equilibrium.

Explanation:

Homeostasis is the process by which the body strives to maintain constant conditions. Three things that the body strives to keep constant are temperature, blood glucose level, and blood pH.

Temperature can be disrupted from equilibrium when the body is exposed to cold or hot temperatures. In response, the body can constrict blood vessels and shiver to generate heat or sweat and dilate blood vessels to cool down.

Blood glucose level can be disrupted when it rises after a meal. The body responds by releasing insulin, which helps lower blood glucose levels by facilitating the uptake of glucose by cells or storing glucose as glycogen in the liver.

Lastly, blood pH can be disrupted by an increase or decrease in acidity. The body can respond by adjusting the breathing rate to eliminate excess carbon dioxide or increasing the production of bicarbonate ions in the kidneys to restore pH balance.