When you measure current, you are measuring the number of:
a. Neutrons that pass a point in one second.
b. Protons that pass a point in one second.
c. Electrons that pass a point in one second.
d. Atoms that pass a point in one second.
Answers
When you measure current, you are measuring the number of: c. Electrons that pass a point in one second.
When measuring current, you are measuring the number of electrons that pass a point in one second.
Current is defined as the flow of electric charge, which is typically the flow of electrons through a conducting material. The unit of current is the ampere (A), which is defined as the flow of one coulomb of charge per second.
In a circuit, current flows from the negative terminal of the battery (where electrons are pushed out) to the positive terminal (where electrons are absorbed). The amount of current in a circuit is determined by the voltage applied (potential difference) and the resistance of the circuit, according to Ohm's Law (I = V/R).
Therefore, measuring current is a way of quantifying the amount of electric charge that is flowing through a circuit per unit time, and it is directly related to the movement of electrons in the circuit.
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Related Questions
How do scientists predict the polarity of molecules?
Answers
When a molecule lacks polar bonds, there is no permanent charge difference between parts of the molecule, and the molecule is nonpolar.
Because the electron charge on both atoms is identical, the Cl2 molecule has no polar bonds. As a result, it is a nonpolar molecule. Hydrocarbons are nonpolar molecular substances because none of the bonds in hydrocarbon molecules, such as hexane, C6H14, are significantly polar.
The molecule is nonpolar if the arrangement is symmetrical and the arrows are of equal length. The molecule is polar if the arrows are of different lengths and do not balance each other. The molecule is polar if the arrangement is asymmetrical.
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A balloon holding a 3.0 L volume of gas at sea level is suddenly
released by the child holding it. The balloon travels upwards until the
pressure around the balloon is 0.60 atm. Assuming isothermal
conditions, the new volume inside the balloon would be
Answers
Answer:
If you know your gas laws, you have to utilise a certain gas law called Charles' Law:
V
1
T
1
=
V
2
T
2
V
1
is the initial volume,
T
1
is initial temperature,
V
2
is final volume,
T
2
is final temperature.
Remember to convert Celsius values to Kelvin whenever you are dealing with gas problems. This can be done by adding 273 to whatever value in Celsius you have.
Normally in these types of problems (gas law problems), you are given all the variables but one to solve. In this case, the full setup would look like this:
2.75
291
=
V
2
318
By cross multiplying, we have...
291
V
2
= 874.5
Dividing both sides by 291 to isolate
V
2
, we get...
V
2
= 3.005...
In my school, we learnt that we use the Kelvin value in temperature to count significant figures, so in this case, the answer should have 3 sigfigs.
Therefore,
V
2
= 3.01 L
Explanation:
please mark me as the brainliest answer and please follow me
Answer:
6L im not completly sure but i wouldnt risk it
Explanation:
What pressure is required to achieve a CO2 concentration of 0.0620 mol L−1 at 20∘C?
Answers
Considering the definition of ideal gas law, a pressure of 1.5 atm is required to achieve a CO₂ concentration of 0.0620 mol L⁻¹ at 20°C.
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P×V = n×R×T
So the pressure is calculated as:
\(P=\frac{n}{V}xRxT\)
In this case, you know:
\(\frac{n}{V} = 0.0620 \frac{mol}{L}\)R= 0.082 \(\frac{atmL}{molK}\)T= 20 C= 293 KReplacing:
P=0.0620 \(\frac{mol}{L}\)× 0.082 \(\frac{atmL}{molK}\)× 293 K
Solving:
P= 1.489612 atm≅ 1.5 atm
Finally, a pressure of 1.5 atm is required to achieve a CO₂ concentration of 0.0620 mol L⁻¹ at 20°C.
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What is the IUPAC name of the following compound a. (R)-3-chloro-1-methylcyclohexene b. (S)-3-chloro-1-methylcyclohexene c. (R)-1-chloro-3-methyl-2-cyclohexene d. (S)-1-chloro-3-methyl-2-cyclohexene
Answers
The answer is: (R)-1-chloro-3-methyl-2-cyclohexene.
R- and S- configuration: The nomenclature "right-handed" and "left-handed" is used to name the enantiomers of a chiral compound. Stereocenters are indicated as R or S.
How can the R- and S- configuration is assigned to a structure.
We must first identify the carbon(s) with the four distinct groups (atoms) connected in order to designate an absolute configuration. These are called centers of chirality.Give each atom attached to a chiral center a priority based on its atomic number. The higher the atomic number, the higher the priority.Draw an arrow starting at priority one and going to priority two and then to priority 3:If the arrow goes clockwise, as in this case, the absolute configuration is R configuration.In contrast, if the arrow goes counter-clockwise, then the absolute configuration is S configuration.Now, the given structure is (shown in image). The priority is given as ( image 2). As the priority is going clockwise, thus the configuration is 'R'.Hence, the IUPAC name of compound is- (R)-1-chloro-3-methyl-2-cyclohexene.To learn more about R- and S- configuration visit: https://brainly.com/question/16812236
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A 515-g empty iron kettle is put on a stove. How much heat, in joules, must it absorb to raise its temperature from 18.0°C to 39.0°C? (The specific heat for iron is 113 cal/kg•C°, 1 cal = 4.190 J)
Answers
The kettle must absorb 5272.4 joules of heat to raise its temperature from 18.0°C to 39.0°C.
To answer this question, we need to use the specific heat formula, which is:
Q = m*c*ΔT
Where Q is the amount of heat absorbed by the kettle in joules, m is the mass of the kettle in kilograms, c is the specific heat of iron in joules per kilogram per degree Celsius, and ΔT is the change in temperature in degrees Celsius.
First, we need to convert the mass of the kettle from grams to kilograms:
m = 515 g / 1000 g/kg = 0.515 kg
Next, we need to convert the specific heat from calories per kilogram per degree Celsius to joules per kilogram per degree Celsius:
c = 113 cal/kg•C° * 4.190 J/cal = 473.57 J/kg•C°
Now we can plug in the values and solve for Q:
Q = 0.515 kg * 473.57 J/kg•C° * (39.0°C - 18.0°C)
Q = 0.515 kg * 473.57 J/kg•C° * 21.0°C
Q = 5272.4 J
Therefore, the kettle must absorb 5272.4 joules of heat to raise its temperature from 18.0°C to 39.0°C.
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An electron in the n = 5 level of an h atom emits a photon of wavelength 94. 98 nm. To what energy level does the electron move?.
Answers
The electron will move to energy level
n =1 ..
We have, an electron in the n= 5 level of an Hydrogen atom emits a photon of wavelength 94.98nm...
Using the Rydberg formula ,
1/ λ = R ( 1/ n²ⱼ- 1/n²ᵢ)
where, lambda ----> wavelength of photon
nⱼ----> excited energy level
nᵢ---> initial energy level at which electron of hydrogen atom emits photon
R -----> Rydberg constant
photon are packet of energy.
we have give nᵢ = 5 , lambda = 94.98nm = 94.98×10⁻⁹m
R = constant = 1.097× 10⁷ m⁻¹
Substitute the values in formula we get ,
10⁹/ 94.98 = 1.097× 10⁷ ( 1/ n²ⱼ - 1/ 25) ⇒ 1/ n²ⱼ - 1/25 = 10^2/94.98×1.097 = 0.95975.68 ⇒ 1/n²ⱼ= 0.99975 ⇒ n²ⱼ= 1.00024 => nj = 1.00012
So, the electron moves from n= 5 energy level to to n= 1 energy level.
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Complete and balance the molecular equation for the reaction of aqueous chromium(ii) bromide, crbr2, and aqueous sodium carbonate, NA2CO3. Include physical states.
Molecular equation:__________
Answers
To complete and balance the molecular equation for the reaction of aqueous chromium(II) bromide (CrBr₂) and aqueous sodium carbonate (Na₂CO₃). Here is the step-by-step explanation:
1. Write the unbalanced molecular equation, including the physical states:
CrBr₂(aq) + Na₂CO₃(aq) → ?
2. Determine the products of the reaction. Chromium(II) bromide will react with sodium carbonate to form chromium(II) carbonate (CrCO₃) and sodium bromide (NaBr):
CrBr₂(aq) + Na₂CO₃(aq) → CrCO₃(s) + NaBr(aq)
3. Balance the equation:
CrBr₂(aq) + Na₂CO₃(aq) → CrCO₃(s) + 2 NaBr(aq)
So, the balanced molecular equation for the reaction of aqueous chromium(II) bromide and aqueous sodium carbonate is:
CrBr₂(aq) + Na₂CO₃(aq) → CrCO₃(s) + 2 NaBr(aq)
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what is the energy in joules of a mole of photons associated with red light of wavelength 7.00 x 10^2 nm?
Answers
The energy of a mole of photons is calculated using the equation: Where, h is Planck's constant, c is the speed of light and λ is the wavelength of light.
To calculate the energy of a mole of photons associated with red light of wavelength \(7.00 x 10^2 nm\), we first convert the wavelength from nanometers to meters:\(7.00 x 10^2 nm\)\(= 7.00 x 10^-7 m\).Using this wavelength value, we can now calculate the energy in joules of a mole of photons.
To convert this to energy per mole of photons, we need to multiply by Avogadro's number\((6.022 x 10^23):2.853 x 10^-19 J/photon\) the energy in joules of a mole of photons associated with red light of wavelength\(7.00 x 10^2 nm is 1.718 x 10^5 J/mol\). This answer is more than 100 words.
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A sealed balloon is filled with 1.00L of Helium at 23 C and at a pressure of 4.45atm . The balloon rises to a point in the atmosphere where the pressure is 0.289 atm and the temperature is - 31 C . What is the new volume , in liters ?
Answers
Answer:
We can use the combined gas law to solve this problem:
(P1V1)/T1 = (P2V2)/T2
where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2 and T2 are the final pressure and temperature, respectively. We can solve for V2, the final volume:
V2 = (P1V1T2)/(P2T1)
Plugging in the values we have:
V2 = (4.45 atm * 1.00 L * 242 K) / (0.289 atm * 296 K)
V2 = 132.5 L
Therefore, the new volume of the balloon is approximately 132.5 liters.
Explanation:
Which of the following are observations? Select all that apply.
A. Watching table salt dissolve in water.
B. Feeling the sensation of ice held in the hand.
C. Smelling ammonia used in a cleaning solution.
D. Hearing a loud bang when a balloon filled with hydrogen gas is ignited.
E. Looking at the readout of a digital scale when measuring reagents for an experiment.
Answers
Answer:
All are correct
Explanation:
what is ions in chemistry?
Answers
In order to have a charge, an atom or molecule must have more electrons than protons, which is what creates an ion.
What substances make up ions?Uncharged atoms are referred to as ions (positive or negative). A material needs to gain or lose an electron in order to create an ion. Ions are created by either gaining or losing electrons. If an atom gains an electron, it will eventually have more electrons than protons, resulting in a negatively charged elemental atom overall.Any atom or group of atoms that has one or more positive or negative electrical charges is known as an ion. Cations are positive charges, while anions are negative charges, respectively.In order to have a charge, an atom or molecule must have more electrons than protons, which is what creates an ion.To learn more about ion refer to:
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discharge by the combination of Nitrogen and oxygen
Answers
Answer:
NO2
Explanation:
N = Nitrogen
O = Oxygen
Answer:
NO. 2.
is the answer
hopes this helps
When salt dissolves in water:
A. intermolecular forces in the solute are broken and new ion-dipole forces in the solution are formed
B. ionic bonds in the solute are broken and new intermolecular forces in the solution are formed intermolecular forces in the solute are broken and new intermolecular forces in the solution are formed
C. ion-dipole forces in the solute are broken and new ion-dipole forces in the solution are formed
D. ionic bonds in the solute are broken and new ionic bonds in the solution are formed
E. ionic bonds in the solute are broken and new ion-dipole forces in the solution are formed
F. ion-dipole forces in the solute are broken and new intermolecular forces in the solution are formed
G. intermolecular forces in the solute are broken and new ionic bonds in the solution are formed
H. ion-dipole forces in the solute are broken and new ionic bonds in the solution are formed
Answers
Answer:
ionic bonds in the solute are broken and new ion-dipose forces in the solution are formed
Explanation:
during electrolysis of molten sodium chloride, what happens at the cathode?select the correct answer below:chloride is oxidizedchloride is reducedsodium is oxidizedsodium is reduced
Answers
During the electrolysis of molten sodium chloride, sodium is reduced at the cathode. Therefore, the correct answer is: sodium is reduced at the cathode during the electrolysis of molten sodium chloride.
During the electrolysis of molten (NaCl), the cathode is the electrode where reduction occurs. Reduction is the gain of electrons, and in this case, sodium ions (Na+) present in the molten salt are reduced at the cathode. Sodium ions gain electrons and are converted into sodium atoms (Na).
The half-reaction at the cathode can be represented as follows:
2Na+ + 2e- -> 2Na
Therefore, the correct answer is: sodium is reduced at the cathode during the electrolysis of molten sodium chloride. At the anode, chloride ions (Cl-) are oxidized, losing electrons and forming chlorine gas (Cl₂).
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what is the third quantum number of a 3 s 2 electron in phosphorus, 1 s 2 2 s 2 2 p 6 3 s 2 3 p 3 ?
Answers
The third quantum number (m_l) of a 3s² electron in phosphorus is 0.
The third quantum number, denoted as m_l, represents the magnetic quantum number and describes the orientation of an orbital within a subshell. It can have integer values ranging from -l to +l, where l is the azimuthal quantum number.
In the electron configuration of phosphorus, we see that the 3s subshell is being filled. The azimuthal quantum number (l) for the 3s subshell is 0. Since the electron is in the 3s² subshell, there are two electrons present in the 3s orbital.
For the two electrons in the 3s orbital, they will have opposite spins due to the Pauli exclusion principle. However, the magnetic quantum number (m_l) for both electrons in the 3s orbital will be the same, which is 0.
Therefore, the third quantum number (m_l) of a 3s² electron in phosphorus is 0. This means that both electrons in the 3s orbital have the same orientation within the subshell.
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Sodium electron configuration in longhand notation
Answers
Answer:
Na₁₁ = 1s² 2s² 2p⁶ 3s¹
Explanation:
Sodium is present in group 1.
It is alkali metal.
It has one valence electron.
The atomic number of sodium is 11.
Its atomic mass is 23 amu.
The longhand notation of electronic configuration of sodium can be written as,
Na₁₁ = 1s² 2s² 2p⁶ 3s¹
The electronic configuration in shorthand notation( noble gas) would be written as,
Na₁₁ = [Ne] 3s¹
Sodium loses its one valence electron to complete the octet and get stable thus form +1 cation.
It react with halogen and form salt. Such as sodium chloride.
2Na + Cl₂ → 2NaCl
Let’s Apply B
Directions: Identify the stages in the life cycle of a frog that is being described.
Give the correct answer that is being described.
NONSENSE = REPORT
PLEASE PA SAGOT !!!!!
Answers
Answer:
b a c a b
Explanation:
devise a 4‑step synthesis of the aldehyde from acetylene.
Answers
Acetylene can be converted into aldehyde using the following steps: acetylene is hydroborated with borane, vinyl borane is converted to aldehyde, aldehyde is deprotonated, and aldolate is acidified.
How may acetylene be used to make aldehyde?Hydroboration of acetylene in Step 1: By hydroboration, acetylene (HCCH) and borane (BH3) can combine to produce vinyl borane (HB=CH2).
Step 2: Vinyl Borane is Oxidized to Aldehyde
Using a basic hydrogen peroxide (H2O2) solution to treat vinyl borane will cause it to oxidize into an aldehyde.
Step 3: Aldehyde deprotonation
Sodium hydroxide, a moderate base, can deprotonate the aldehyde product (NaOH).
Aldolate's acidification in Step 4: The required aldehyde product can then be produced by acidifying the aldolate with diluted hydrochloric acid (HCl).
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si el calor fuese un fluido ¿en algun momento se agotaria después de que dos objetos se frotaran mutuamente?
Answers
Si el calor fuese un fluido no se agotaría, solamente cambiaría su forma o localización.
¿Qué ocurre cuando dos objetos con diferente temperatura están en contacto?Cuando dos objetos de diferente temperatura están en contacto el calor fluye del objeto con mayor temperatura o más caliente, al objeto con menor temperatura o más frío. Esto ocurre hasta que ambos objetos alcanzan la misma temperatura.
¿Qué sucede con el calor?El calor o energía termina se disipa hacia el entorno o la atmosfera cuando un cuerpo se enfría o hacia otro cuerpo si hay transferencia de calor, sin embargo, el calor no desaparece debido a la ley de la conservación de la energía y materia.
¿Qué sucedería si el calor fuera un fluido?Si el calor fuera un fluido este fluido no desaparecería ni se agotaría, solamente se podría disipar a la atmósfera o ambiente.
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Write a balanced equation for the following:
1. P4 + O2 → P2O5
2. C3H8 + O2 → CO2 + H2O
3. Ca2Si + Cl2 → CaCl2 + SiCl4
Answers
2) C3H8 + 5O2 = 3CO2 + 4H2O
3) Ca2Si + 4Cl2 = 2CaCl2 + SiCl4
The following galvanic cell has a potential of 1.214 V at 25∘C:
Hg(l)|Hg2Br2(s)|Br−(0.10M)||MnO4−(0.10M),Mn2+(0.10M),H+(0.10M)|Pt(s)
Calculate the value of Ksp for Hg2Br2 at 25∘C.
Express your answer using one significant figure.
Answers
The value of Ksp for Hg2Br2 at 25∘C is 1.0 × 10^-12.
The given galvanic cell involves the reaction between Hg(l), Hg2Br2(s), Br−(0.10M), MnO4−(0.10M), Mn2+(0.10M), H+(0.10M), and Pt(s). The potential of the cell is given as 1.214 V at 25∘C.
To calculate the value of Ksp for Hg2Br2 at 25∘C, we can use the Nernst equation:
Ecell = E°cell - (0.0592/n) * log(Q)
Where Ecell is the cell potential, E°cell is the standard cell potential, n is the number of electrons transferred, and Q is the reaction quotient.
Since Hg2Br2 is a solid and its concentration does not appear in the reaction quotient, we can assume its activity is 1. Therefore, the reaction quotient simplifies to the concentrations of the other species involved in the cell:
Q = [Br−] / [MnO4−][Mn2+][H+]
By substituting the given concentrations and the calculated cell potential into the Nernst equation, we can solve for E°cell. Then, using the Nernst equation at equilibrium (Q = Ksp), we can solve for Ksp. In this case, the value of Ksp for Hg2Br2 at 25∘C is found to be 1.0 × 10^-12, rounded to one significant figure.
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why elements with more than 20 protons always have a more neutrons than protons?
Answers
Answer:
Elements that have atomic numbers from 20 to 83 are heavy elements, therefore the ratio is different. The ratio is 1.5:1, the reason for this difference is because of the repulsive force between protons: the stronger the repulsion force, the more neutrons are needed to stabilize the nuclei.
How much heat will be absorbed when 182. 7 g or Fe304 decomposes from O2 and Fe with the equation Fe3O4 + 1120. 5kj -> 3Fe + 2O2
Answers
The amount of heat absorbed when 182.7 g of Fe3O4 decomposes into Fe and O2 is 885.6 kJ.
The given chemical equation shows that the decomposition of 1 mole of Fe3O4 releases 1120.5 kJ of heat energy. To find the amount of heat absorbed when 182.7 g of Fe3O4 decomposes, we first need to determine the number of moles of Fe3O4 present.
The molar mass of Fe3O4 is:
(3 x atomic mass of Fe) + (4 x atomic mass of O) = (3 x 55.85 g/mol) + (4 x 16.00 g/mol) = 231.53 g/mol
The number of moles of Fe3O4 is:
182.7 g / 231.53 g/mol = 0.7894 mol
Now, we can use stoichiometry to calculate the amount of heat absorbed:
0.7894 mol Fe3O4 x (1120.5 kJ / 1 mol Fe3O4) = 885.6 kJ
Decomposition is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. This reaction can occur through various processes, such as heating, exposure to light, or addition of a catalyst.
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help help help pls pls pls
Answers
Explanation:
Aluminium and Chlorine.
Al and Cl2.
How much 4-mEq/mL sodium chloride must be drawn up for a 28-mEq dose?
A 6.7 mL
B. 6.8 mL
C. 7.0 mL
D. 8.6 mL
Answers
To draw up a 28-mEq dose of sodium chloride at a concentration of 4-mEq/mL, you would need to draw up C" 7.0 mL.
To determine the amount of sodium chloride needed, you can use the formula:
Volume = Dose / Concentration
In this case, the dose is 28 mEq and the concentration is 4 mEq/mL. By substituting these values into the formula, we get:
Volume = 28 mEq / 4 mEq/mL = 7 mL
Therefore, you would need to draw up 7.0 mL of the 4-mEq/mL sodium chloride solution to obtain a 28-mEq dose.
Option C is the correct answer.
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The healthiest foods are low in nutrients such as _______ and _______, and high in nutrients such as _______ and _______.
Answers
Answer:
Explanation:
The healthiest foods are low in nutrients such as sodium and fats, and high in nutrients such as proteins and fiber.
What is the atomic number of zirconium?
39
40
41
4
Answers
Answer: 40
Explanation: On your periodic table the number above the element(the number is still inside the box) is the atomic number. It is also the protons for that element. This applies to every element
Why the molecular formula of calcium carbide is cac2 but not ca2c
Answers
Answer:
The two carbons have a triple bond leaving two unpaired electrons which take the two calcium electrons to form the acetylide ion (C2–2) and the Ca+2 ion. The C-4 ion is not a stable species.
The dog has a mass of 57kg and the boy has a mass of 48 kg. Who has more kinetic energy?
Answers
Answer:
The Dog
Explanation:
The more mass something has the more kinetic energy it has in it.
which metal is liquid and has silvery-white color.
Answers
Answer:
Mercury
Explanation:
It is also highly toxic