Graded potentials often happen at ______ due to ______

Answer:

Metals have a property by which they can be beaten into thin sheets. This is called malleability.

Explanation:

one example is silver metal beaten to make silver foil used for decorating. On being struck hard, the metals produce a ringing sound. Due to the Metals that are used for various purposes, from making wires and sheets.

When steel and zinc were connected, zinc is the cathode. The term cathode refers to the electrode that is reduced during an electrochemical reaction.

The electrons are moved from the anode to the cathode during an electrochemical reaction in order to maintain a current in the wire that links the two electrodes.

According to the galvanic series, zinc is more active than iron, meaning that it is more likely to lose electrons and be oxidized. As a result, when steel and zinc are connected, zinc will act as the anode and lose electrons, whereas iron (steel) will act as the cathode and receive the electrons transferred by zinc.

To know more about electrochemical reaction visit:-

https://brainly.com/question/13062424

#SPJ11

Answer:

efflorescence is the migration of a salt to the surface of a porous material, where it forms a coating.

Answer: Efflorescence is a crystalline or powdery deposit of salts often visible on the surface of concrete, brick, stucco, or natural stone surfaces. It occurs when water leaves behind salt deposits on the masonry surface.

Explanation:  NO EXPLANTATION SORRY!

Answer: Where are the answers?

Explanation:

128.8 atm is the work in atm done on the gas during this process.

W=pV, W = p V, where W is work, p is pressure, and V is the change in gas volume, can be used to calculate the work performed by a gas under a constant pressure.

The formula Work = Force Distance can be used to compute work. The joule (J) or Newton-meter (N-m) is the SI unit for work. The amount of work required to move an item one meter with one newton of force is equal to one joule.

Work done during a gas's expansion includes:

W = -PΔV

W = -P( Vfinal - Vintial)

w =  -92 ( 2.5 - 1.1 )

w = 128.8 atm

To know more about Work done visit:-

https://brainly.com/question/10334435

#SPJ4

The number of pedestrian fatalities killed in collisions has more than doubled in the last ten years.

Pedestrian fatalities are deaths that occur when a person who is walking or running is involved in a collision with a vehicle or other object.

There are several factors that may contribute to the increase in pedestrian fatalities.

In conclusion, the number of pedestrian fatalities killed in collisions has more than doubled in the last ten years. The increase in pedestrian fatalities is a concerning trend that highlights the need for increased awareness of pedestrian safety.

Learn more about Pedestrian fatalities here:

https://brainly.com/question/12863673

#SPJ4

To calculate the energy carried by one mole of photons of green light emitted by a fluorescent proflavine molecule at 514 nm, we'll use the energy formula: \(E = h * c /\lambda\) where E is the energy of a single photon, h is Planck's constant (\(6.626 *10^{-34} Js\)), c is the speed of light (\(2.998 * 10^8 m/s\)), and λ is the wavelength (514 nm).

First, convert the wavelength to meters:

\(514 nm = 514 * 10^{-9} m\).
Next, calculate the energy of a single photon:

\(E = (6.626 * 10^{-34} Js) * (2.998 * 10^8 m/s) / (514 * 10^{-9} m) = 3.872 * 10^{-19} J.\)
Now, to find the energy carried by one mole of photons, multiply the energy of a single photon by Avogadro's number (\(6.022 x 10^{23\)):
Energy per mole =\((3.872 *10^{-19 }J) * (6.022 * 10^{23}) = 233.0 kJ.\)
Thus, one mole of photons of green light emitted by a fluorescent proflavine molecule at 514 nm carries 233.0 kJ of energy.

Learn more about fluorescent here:

https://brainly.com/question/24228588

#SPJ11

Answer: 2x10^-4

Explanation:

This is easy stuff

Answer:

If a solid is added to a liquid until no more of the solid will dissolve saturated solution is formed.

According to the concept of solubility, if a solid is added to a liquid until no more of the solid will dissolve saturated solution is formed.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

Learn more about solubility,here:

https://brainly.com/question/29589228

#SPJ2

thank you for the points

Answer:

1/8th = 12.5%

Explanation:

Three half lives would be   1/2 * 1/2 * 1/2 = 1/8 th of original

Answer:

when there is more kinetic energy the objects moves fast...

The time required to reduce the concentration from 0.00757 M to 0.00180 M is equal to 1.52 × 10⁻⁴ s. The half-life period of the reaction is 9.98× 10⁻⁵s.

The rate of reaction is described as the speed at which reactants are converted into products. A catalyst increases the rate of the reaction without going under any change in the chemical reaction.

Given the initial concentration of the reactant, C₀= 0.00757 M

The concentration of reactant after time t is C₁= 0.00180 M

The rate constant of the reaction, k = 37.9 M⁻¹s⁻¹

For the first-order reaction: \(C_t =C_0-kt\)

0.00180 = 0.00757 - (37.9) t

t =  1.52 × 10⁻⁴ s

The half-life period of the reaction: \(t_{\frac{1}{2} } =\frac{C_0}{2k}\)

\(t_{\frac{1}{2} } =\frac{0.00757}{2\times 37.9}\)

Half-life of the reaction = 9.98 × 10⁻⁵s

Learn more about the rate of reaction, here:

brainly.com/question/13571877

#SPJ1

Atoms from an element in group IIA are allowed to react with atoms from an element in group VIIA, and the type of compound is likely to form will be A B₂ type.

Group IIA consists of alkaline earth metals beryllium, magnesium, calcium, strontium, barium, and radium. These alkaline earth metals show less reactivity than alkali metals. Mostly the elements of group IIA make 2⁺ charge ions in solutions. While group VIIA consists of halogens fluorine, chlorine, bromine, iodine, and astatine. Mostly the elements of group VIIA make 1⁻ charge ions in solutions. As we can see that group IIA elements are losing electrons easily and group VII are easily gaining electrons.

A ₂⁺ : B 1⁻

Cross the charges

A B₂

MgCl₂ and CaCl₂ are some common examples.

You can also learn about halogens from the following question:

https://brainly.com/question/11156152

#SPJ4

In the above intermediate chemical equation, oxygen will appear as follows: O₂(g) as a reactant (option B).

A chemical equation in chemistry is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

According to this question, an intermediate chemical equation is presented as follows:

As observed in the above chemical equation, oxygen will react in its gaseous form i.e. as a reactant.

Learn more about chemical equation at: https://brainly.com/question/28294176

#SPJ1

Answer: Based on the stoichiometry 1 mole of carbon disulfide will produce 1 mole of carbon dioxide. Similarly we can apply the volume ratio, so 1.1L of carbon disulfide will produce 1.1L of carbon dioxide.

Answer:

The water cycle will affect the climate by causing rain and snow.

Explanation:

if tempatures increase more rain fall will occur because more water evaporates in the air.

Answer:

That fresh water hydrates the carbon-based lifeforms on earth. But through evaporation, and transpiration from plants leaf surfaces, it gets back into the atmosphere to feed clouds for the next rainfall. The cycling of liquid water and returning vapor creates our climate and our living environment.

Answer:

High melting point is answer

Answer:

Electrons.

Explanation:

Answer:

oh yes chemical oxidation removes

Explanation:

but i m not sure hope it is right i haven't looked book this time

only water and ethanol (ii.) would be miscible since they can form hydrogen bonds, whereas toluene and xylene (i.) as well as water and xylene (iii.) would be immiscible due to their differing intermolecular forces.

Miscibility refers to the ability of two liquids to mix uniformly and form a homogeneous solution. It is determined by the nature of intermolecular forces between the molecules of the liquids.

i. Toluene (C7H8) and xylene (C8H10): Toluene and xylene are both hydrocarbons with similar molecular structures. They have predominantly nonpolar interactions, which are weaker than the intermolecular forces in polar molecules. Therefore, toluene and xylene are immiscible.

ii. Water and ethanol (C2H5OH): Both water and ethanol have polar hydroxyl groups (-OH) in their molecular structure, allowing them to form strong hydrogen bonds. Hydrogen bonding leads to the formation of intermolecular attractions between the molecules, making water and ethanol miscible.

iii. Water and xylene (C8H10): Similar to the case of toluene and xylene, water and xylene have different intermolecular forces. Water forms strong hydrogen bonds, while xylene has predominantly nonpolar interactions. Due to the mismatch in intermolecular forces, water and xylene are immiscible.

Learn more about toluene here : brainly.com/question/29899857

#SPJ11

Titration is the process of determining the amount of a substance in a solution by measuring the volume of a solution with a known concentration that is required to react with it. The answer to the given question is option d) 5.25.

In the titration of a weak base with a strong acid, the pH at the half-equivalence point can be calculated as follows: At the half-equivalence point, we have equal moles of the weak base and the strong acid. As a result, we get a solution that contains the weak base, its conjugate acid, and water. In the solution, there is an equilibrium between the weak base and its conjugate acid. This equilibrium has an acid dissociation constant, Ka. It's given by:

Ka = [H+][A–]/[HA]

The pKa is calculated by taking the negative logarithm of Ka:

pKa = -log(Ka)

At the half-equivalence point, [HA] = [A–] and the expression for pKa becomes:

pKa = -log([H+])

Therefore, the pH at the half-equivalence point is:

pH = 1/2 (pKb + pKa)

Given that pKb = 7.95 for the weak base, we can calculate the pKa:

pKw = 14 (at 25°C)

pKw = pKa + pKb

14 = pKa + 7.95

pKa = 6.05

Therefore, the pH at the half-equivalence point is:

pH = 1/2 (7.95 + 6.05)

pH = 1/2 (14)

pH = 7

At the half-equivalence point, the pH of the solution is equal to 7. Therefore, option d) 5.25 is incorrect.

To know more about concentration visit:

https://brainly.com/question/3045247

#SPJ11

Answer:

Hope it helps.

Explanation:

It decays by beta particle emission into xenon-131. After eight days have passed, half of the atoms of any sample of iodine-131 will have decayed, and the sample will now be 50% iodine-131 and 50% xenon-131

Heavy unstable atoms will continuously emit radiation and will undergo nuclear decay to form stable products. 25 g of americium -241 will take 39 years to decay into its 6.25 g sample.

Heavy unstable nuclei undergo decay when they emit radiations of alpha, beta or gamma particles. After that they will form stable isotopes or other lighter nuclei after emitting these charged particles.

The time an unstable nuclei takes to decay into half of its initial amount is called half life time. The half life time of Americium -241 is 432 years. Thus half life time of 25 g of Am-241 is

= (25 × 432 )/241

= 44.81 years.

The decay constant k can be calculated as follows:

k = 0.693 /half life time

  = 0.693 /44.81 yrs

 = 0.015.

Now the time taken for the decay process is calculated by the following  equation:

t = 1/k log (25/6.25)

 = 1/0.015yr-1  log (25/6.25)

 = 39 years

Hence, 5 g of americium -241 will take 39 years to decay into its 6.25 g sample.

To find more about radioactive decay, refer the link below:

https://brainly.com/question/1770619

#SPJ2

A potter can use chemistry to better understand how a pottery wheel speed impacts the pot's height. OB. A potter's design can benefit from chemistry.

Several verbal and nounal senses of the word "design" exist. Design refers to the process of outlining a project's final form and functionality through the use of sketches. For instance, before building a new bridge, the government will hire a team to design it. Humans have been proven to develop an immediate thought within a few seconds, but once that impression has matured, it can take much longer to change that perception.

Chemistry is the area of science that focuses.

To know more about design visit :

https://brainly.com/question/14035075

#SPJ1

The volume that is occupied by the gas is obtained as  56 L.

We know that from the Avogadro's law, the volume that can be occupied by one mole of a gas is obtained as 22.4 L. This implies that we have to find the number of moles in the 70 g of the CO and then obtain the corresponding volume by simple proportion.

Number of moles of CO = 70.0 g/28 g/mol

= 2.5 moles

If 1 mole of the gas occupies 22.4 L

2.5 moles of the gas occupies 2.5 * 22.4/1 mole

= 56 L

Learn more about volume of a gas:https://brainly.com/question/12357202

#SPJ1

Answer: C

Explanation:

For this problem, we would use Charles's Law. We fill in what we are given and solve.

Charles's Law: \(\frac{V_{1} }{T_{1} } =\frac{V_{2} }{T_{2} }\)

\(\frac{10 L}{5K} =\frac{4.00L}{T_{2} }\)

\(10T_{2}= 20\)

\(T_{2}=2K\)

211.454 grams of K2CO3 are included in 1.53 moles of K2CO3.

In the International System of Units, the mole (sign mol) is the unit of material quantity. The amount of substance is a measurement of how many elementary entities of a certain substance are present in an object or sample. The mole is defined as having 6.022140761023 basic entities. A mole is a crucial unit of measurement for chemists. A mole of anything equals 602,214,076,000,000,000,000,000 of that item, just as a dozen eggs equals twelve eggs. Chemists must use moles to measure very tiny objects such as atoms, molecules, or other particles.

Here,

1 mole is equal to 1 moles K2CO3, or 138.2055 grams.

grams are in 1.53 moles of K₂CO3,

=211.454 grams

1.53 moles of K₂CO3 contains 211.454 grams of K₂CO3.

To know more about moles,

https://brainly.com/question/30373566

#SPJ1

Answer:

Explanation:

A battery

Answer:

Ac motor is in this images

Answer:The fuel/air mixture may become too minimal

Explanation:While cruising at 9,500 feet MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 feet MSL is made without readjusting the mixture