What is the electric potential, in volts, due to the proton in an orbit with radius 0.530 × 10–10 m?


Answer 1

Answer : The electric potential on proton is, 27.1 V

Explanation :

To calculate the electric potential we are using the formula.


V = electric potential

q = charge on proton =

r = radius =

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

Thus, the electric potential on proton is, 27.1 V

Related Questions


When water boils, what bonds are being broken to produce steam?


Answer: hydrogen bonds.


Liquid water molecules form a strong intermolecular attraction (force) named hydrogen bonds.

When water boils, the intermolecular forces have to be defeated to pass from a more ordered and tight arrange of molecules in the liquid state to a more disordered and loose arrange of atoms in the gas state (the molecules move freely occuping all the space).

In  liquid water the molecules are packed closely together. As the liquid water is heated, the temperature increase causes kinetic energy increases (increasing the motion and vibration of molecules).

When the molecular motion is as intense as disrupt the hydrogen bonds between the molecules, the molecules become gas (steam).



Does sodium have a positive or negative charge after ionization?



Sodium has atomic number of 11 with electronic configuration of :

Sodium loose it single electron to attain stability of noble gas configuration. While this process electron gets removed from the outer shell of the sodium atom and it gains positive charge of +1.


Sodium Chloride also known as table salt, the sodium has a positive charge and the chloride a negative so after ionization that leaves you with two negative charges because it takes the salt away. possibly disforming the atoms.

Proteins are built from amino acids. Proteins that contain the amino acids tryptophan, phenylalanine, and tyrosine can be quantified using UV spectroscopy and do not require a detection reagent such as Coomassie Blue. Why is this the case?



The amino acids tryptophan, phenylalanine and tyrosine are aromatic amino acids. That means they have in their structure an aromatic ring. Reagents like Coomasie Blu can react with an amino acid in an unspecific way. UV spectroscopic is a specific technic for identifying aromatic amino acids


Commasie Blu reagent has a Sulphate group (negative) which reacts with the positive part of the amino group. All amino acids have an amine group. It is because of that they have their name.  

On another hand, Aromatic amino acids can absorb ultraviolet light because it makes resonate the bonds pi in the aromatic ring.  

In conclusion, with Commasie Blu reagent it is possible to identify amino acids and with the UV light, you can identifying aromatic amino acids.


The 116-g sample was heated to 94.5°C and placed into a calorimeter containing 72 g of water at 20.0°C. The heat capacity of the calorimeter was 14.7 J/K. The final temperature in the calorimeter was 25.6°C. What is the specific heat capacity (in J/g°C) of the mineral?



0.2212 J/g.k


The law of conservation of Energy states that the sum of heat given out by the mineral in the system and the heat absorbed by the water and calorimeter are equal to zero.

This implies that:

We can as well say that:

             ----------------equation (1)

Also, heat absorbed by the calorimeter which is denoted by;

              ---------------- equation (2)


= heat capacity of the calorimeter

= change in  temperature

However, the heat released by the mineral and the one absorbed by the water in the system is given as:

Q = mcΔT                       ------------------  equation (3)


m = mass

c = specific heat capacity

ΔT = change in temperature

If we substitute the two prior equation (i.e equation 2 and 3) into equation 1: we have;

            ---------------- equation (4)

Now , let's state our given parameters;

Given that:

mass of water () = 72g

The specific Heat capacity of water () = 4.18 J/g.k

change in temperature () =25.6 °C - 20°C

change in temperature () = 5.6 °C                  

(since we are asked to leave our answer in J/g°C)

Heat capacity of calorimeter = 14.7 J/k

change in temperature () =  5.6 °C

mass of the mineral = 116 g

change in temperature of the mineral () = 25.6 °C - 94.5 °C

change in temperature of the mineral () = -68.9 °C

specific heat capacity  of the mineral

∴ substituting all our values into equation (4); we have:

= 0.221172 J/g°C

= 0.2212 J/g°C


John rides his motorcycle with a constant speed of 52 miles per hour. How long will he take to travel a distance of 156 miles?


it will take john 3 hours to reach his destination

1 hour = 52 miles x 3 = 156 miles


trans-2-Butene does not exhibit a signal in the double-bond region of the spectrum (1600–1850 cm-1); however, IR spectroscopy is still helpful in identifying the presence of the double bond. Select the other signal that would indicate the presence of a C= C bond.



The other signal that would indicate the presence of a C= C bond appears close to 3100 .


Bands that appear above 3000  are often unsaturation diagnoses suggest. The band at 3000- 3100 is characteristics for C-H stretching frequencies and normally is overlaps with the ones for alkanes because it is a band of weak intensity.


Which law tells us the number of atoms of each element must be the same on both sides of a chemical equation?


I think the law in question here is the law of conservation of mass. All chemical equations have to adhere to the law of conservation of mass, that states that matter cannot be created or destroyed; thus, there must be the same number of atoms of each element on each side (right and the left side)of the chemical equation.

What is the percent composition of C4H10?


C: 4 x 12.01=48.04/58.1 x 100 = 82.7%

H: 10 x 1.01 = 10.1/58.1 x 100 = 17.4%

Answer: 82.7% C and 17.3% H


Air is about 78% nitrogen gas (N2) by mass. The molar mass of nitrogen gas is 28.0 g/mol. A 100.0-g sample of air contains how many moles of nitrogen?


Answer: The number of moles of nitrogen will be 3.57 moles.


To calculate the number of moles, we use the following equation:

We are given:

Given mass of the nitrogen = 100 g

Molar mass of the sample = 28g/mol

Putting values in above equation, we get:

Hence, the number of moles of nitrogen will be 3.57 moles.

(78%×100g)/100% = 0,78×100g = 78g N₂

1 mole N₂ ------ 28g
X ----------------- 78g
X = 78/28 = 2,7857 moles

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