The correct answer is option B: there is a decrease in the speed of the emitted electrons.
If we increase the wavelength of the light and determine that electrons are still being emitted. Then the truth is that there is a decrease in the speed of the emitted electrons.
In chemistry, the relation between the energy of a light photon and its wavelength is given by the following equation;
E = hc / λ
or λ = hc / E
Here, h is the plank's constant, 'E' represents the energy of light photons, and c is the light speed where λ indicates the wavelength of the light.
The above equation shows that the energy of photons and wavelength are inversely related to each other.
The value of energy decreases, if wavelength increases.
To put it simply, if the energy decreases then the speed and kinetic energy of the emitted electron also decrease.
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The complete question is:
You fire a beam of light at a piece of metal and determine that electrons are emitted with 2.0 eV of energy. You increase the wavelength of the light and determine that electrons are still being emitted. What else is true?
(A) there is an increase in the speed of the emitted electrons.
(B) there is a decrease in the speed of the emitted electrons.
(C) there is an increase in the number of electrons emitted.
(D) there is a decrease in the number of electrons emitted.
several emergent properties of water contribute to the suitability of the environment for life. how does the ability of water to function as a versatile solvent arise from the structure of water molecules?
Polarity of water is responsible for the versatility of water as a solvent.
What is water?Water is a molecule that is composed of hydrogen and oxygen. The compound is polar because if the high electronegativity difference that exists between hydrogen and oxygen.
As a result of this polarity, a permanent dipole moment exists between the molecules of hydrogen. This is a strong dipole that makes the molecules of water to aggregate together. This strong dipole that exists in water is what we call the hydrogen bond.
Now the hydrogen bond makes water to have a high surface tension and high boiling point. It also accounts for the differences in the solid and the liquid states of water.
As such, the polarity of water is responsible for the versatility of water as a solvent.
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How does distance from the thermal energy source affect the amount of thermal energy transfer occurring in a substance
The distance from the thermal energy source affect the amount of thermal energy transfer occurring in a substance in a way that area that the radiation is spread over is four times as large for just the double distance.
Thermal energy that can transfer between substances always does so from one that is warmer to one that is cooler. Conduction, convention, and radiation are the three categories. Distance causes the heat radiation emitted by a source, such the sun, to disperse.
As it moves away from the source, the same quantity of energy is dispersed over a larger and larger sphere every second. For simply the twice distance, the radiation's distribution area is four times as large.
The solar constant (also known as the solar coefficient), abbreviated S, refers to the Sun's intensity on Earth, [tex]W/m^{2}[/tex], in units. This information reveals how much radiation enters a square metre of Earth (or any other planet at a similar distance from the sun).
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Charges of +2 µC and +3 µC are 4 mm from each other. Raina's group draws four diagrams trying to represent the
electrical force between the charges.
+2 μC +3 μC +2 μC +3 μC +2 μC +3 μC +2 μC +3 μC
W
Z
X
Y
Which diagram is correct?
O W
OX
ΟΥ
OZ
Mark this and return
Next
Submit
The correct diagram is W.
A diagram is often a -dimensional display that communicates the use of visual relationships. it is a simplified and dependent visual representation of ideas, ideas, buildings, family members, statistical records, anatomy, etc. it can be used for all elements of human activities to give an explanation for or illustrate a topic. example Diagrams are graphics that show a photo, or photographs, accompanied with the aid of either note, labels, or a legend, which will explain principles or techniques. Describe gadgets or locations.
Display how matters paintings, circulate or change. assist provide extra perception into the issue displayed. A diagram is a drawing that suggests the distinctive parts of something and the way they work collectively. three-Line diagram is part of the detailed design document. Used for manipulating designing circuit diagrams, managing circuits, segment sequencing, differential relay placing, and metering transformer connection. A records chart is a sort of diagram or graph, that organizes and represents a set of numerical or qualitative information.
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Which of the following would be appropriate reason for scientists to reject atomic theory
Answer:
-evidence that some kinds of matter are made up of waves instead of particles
-observations that cannot be explained by the theory
Explanation:
Both of these are right.
During an experiment, your lab partner spills about 20 ml of 1.5 m hcl on your hand. what should you do?
I Will spill a corrosive substance on my skin or clothing, wash it off with plenty of water for 15 minutes. Use the safety shower if i were exposed to a large HCl
What do you have to do if you spill hydrochloric acid?
Acid spills should be neutralized with bicarbonate of soda and then cleaned up with a paper towel or sponge. don't use a strong base, like sodium hydroxide, to neutralize a robust acid like hydrochloric acid. The bicarbonate of soda will do the job with much less chance of injury
How should an acid spill be cleaned up?
Acids are often neutralized with soda ash or sodium bicarbonate whereas bases can be neutralized with citric acid or ascorbic acid. Following neutralization, the pH of the spill should be checked to make sure that the spill has been neutralized
Why does one have to immediately clean up any HCl spill?
Spills of acid or sulfuric acid can lead to significant contamination of the environment if not handled quickly and properly. DEQ's goal is to wash up spills within 72 hours of an incident
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How are the electron levels and rows of the periodic table related?
Answer:
The highest energy level number (1 through 7) for the electrons in an atom corresponds to the period (or row) in the periodic table to which that atom belongs. Because there are 7 periods in the table, there are 7 energy levels. For example, hydrogen (H) is in the first period, so it has only one energy level.
Answer:
The number of valence electrons in an atom is reflected by its position in the periodic table of the elements.
Explanation:
Across each row, or period, of the periodic table, the number of valence electrons in groups 1 2 and 13 18 increases by one from one element to the next.
If a sodium hydroxide solution were added to a solution containing lead(ii) ions, sodium ions, nickel(ii) ions, and potassium ions, which ion(s) would remain in the supernatant?
If a sodium hydroxide solution were added to a solution containing lead(ii) ions, sodium ions, nickel(ii) ions, and potassium ions then the ion which would remain in the supernatant are potassium ions and sodium ions
Supernatant means clear liquid overlying material deposited by settling, precipitation and centrifugation called as supernatant. so here in the solution of sodium hydroxide means in naoh solution added lead(ii) ions, sodium ions, nickel(ii) ions, and potassium ions in that solution potassium ions and sodium ions are deposited by settling down and making precipitation that's why in this solution of naoh potassium ions and sodium ions are remain in the supernatant.
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A+sample+of+a+radioactive+substance+decayed+to+95%+of+its+original+amount+after+a+year. what+is+the+half-life+of+the+substance?
Half life of the substance will be 0.152a
One of the main terms used in physics to describe the radioactive decay of a specific sample or element over a predetermined amount of time is half-life, also known as half-life period.the atoms whose mean life exceeds their half-life. This would imply that the mean life would be equal to the half-life divided by 2, which is the natural algorithm. On the other side, probability is frequently used to define the half-life.Half life formula:
Nₜ= Noe⁽⁻λᵗ⁾
Nₜ= substance leftover
No = initial concentration
λ = decay constant
Nₜ= 95
No = 100
t = 1
So, putting values in the above equation
95 = 100e⁽⁻λ⁾ .1
e^-λ = 95/100
ln e⁽⁻λ⁾ = ln(95/100)
find out the value of lambda
λ = ln( 0.95) = 4.55/a
t₍ₕₐₗf₎ = 0.693/ λ
Put the value of lamba in this equation
t₍ₕₐₗf₎ = 0.693 / 4.55
= 0.152a
Therefore, half life of the a sample of a radioactive substance decayed to 95% of its original amount after a year is 0.152a
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What is the relationship in terms of kinetic theory of gases if the volume increases as the pressure decrease
According to boyle's law
PV = constant
According to kinetic molecular theory of gases Boyle's law :
When molecules collide they create pressure. When the molecules are closer together they collide more frequently. Hence more volume less collisions less pressure.
Kinetic theory is based on the kinetic energy of moving particles. The kinetic energy is directly related to the temperature.In Boyle's Law the temperature is helped constant, so the kinetic energy of the molecules is a constant. The pressure and the volume are inversely related in Boyle's LawIn Kinetic theory pressure is created by the collision of particles. ( atoms or molecules) with each other and the container. The more collisions the more pressure. An increase in temperature will cause an increase in the number of collisions as the molecules have more kinetic energy. This is not the case in Boyle's Law.What happens in Boyle's Law is that the molecules are forced more closely together. The more densely packed the gas molecules are the more often they will collide creating more pressure. So if the volume is less the number of collisions and pressure will be greater. If the volume is greater the number of collisions and pressure will be less. So volume and pressure are inversely related if the temperature and total kinetic energy is kept constantTo know more about Kinetic theory visit : https://brainly.com/question/14349214
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. if a cell culture has 3 x 105 cells per ml , and the culture flasks hold 75 ml of culture each and you have 12 flasks, how many cells are there in total?
If a cell culture has 3 x 105 cells per ml , and the culture flasks hold 75 ml of culture each and you have 12 flasks, The bond between K⁺ and Cl⁻ ions is an ionic bond.
What is ionic bond?The main contact that takes place in ionic compounds is called ionic bonding, and it involves the electrostatic attraction between two atoms or ions with dramatically differing electronegativities. Along with covalent and metallic bonds, it is one of the most prevalent types of bonds. Ions are atoms, or collections of atoms, that have an electrical charge. Ions with a negative charge are produced by gaining electrons in atoms (called anions). Ions with a positive charge are created when atoms lose their electrons (called cations).
Electrovalence, as opposed to covalence, is the name for this transfer of electrons. The cation is a metal atom in the most straightforward scenario, while the anion is a nonmetal atom, however these ions can have more complex chemical compositions.
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calculate the molar concentration of the polycyclic aromatic hydrocarbon ( pah ), anthracene ( 178.23 g/mol), that was found in a well water sample at a concentration of 3.04 ppb. assume the density of the well water sample is 1.00 g/ml.
The polycyclic aromatic hydrocarbon (pah), anthracene, has a molar concentration of 2.643 x 10-8.
What is molar concentration?
The phrase "molar concentration" (also known as "molarity," "amount concentration," or "substance concentration") refers to the amount of a substance per unit volume of solution and is used to describe a chemical species' (more particularly, a solute's) concentration in a solution.
The number of moles per liter, represented by the unit sign mol/L or mol/dm3 in SI units, is the most common way to measure molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or one M.
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Aluminum metal reacts with dilute sulfuric acid to produce aluminum sulfate and hydrogen gas. what mass of aluminum, in grams, will react with 5.91 g of sulfuric acid?
atomic weights 5.91 g of sulfuric acid is S-32 O-16 Al-27 H-1
What is aluminum sulfate?
Aluminum sulfate is the most widely used aluminum coagulant. it's available in a number of solid forms such as block, kibbled, or ground and is additionally available as a solution.
Aluminum sulfate is the most widely used aluminum coagulant. it's available in a number of solid forms such as block, kibbled, or ground and is additionally available as a solution.
aluminium sulfate 250g= 2.55 mol (250/98)
3Al + 2H2SO4 ---------> Al2(SO4)3 + 2H2
therefore two parts of vitriol produce one part of aluminum sulfate.
2.55mol /2 =1.275 mol 1.275mols of aluminum sulfate is produced.
1.275 mol s multiplied by aluminum sulfate's molar mass (342g/mol) gives its mass in grams.
What are atomic weights S-32 O-16 Al-27 H-1
aluminium sulfate 250g= 2.55 mol (250/98)
3Al + 2H2SO4 ---------> Al2(SO4)3 + 2H2
therefore two parts of vitriol produce one part of aluminum sulfate.
2.55mol /2 =1.275 mol 1.275mols of aluminum sulfate is produced.
1.275mol s multiplied by aluminum sulfate's molar mass (342g/mol) gives its mass in grams.
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How much of each of the following substances would you add to water to prepare 1.50 l of a 0.60 m solution?
From concentrated (18 M) sulfuric acid [H2SO4]
To prepare the solution, we dilute 33 mL of 18 M sulfuric acid to 1.00 L.
Molarity (M) = moles solute / Liter solution
Mass% = mass solute / mass solution×100
We can calculate the amount of 18 M sulfuric acid that needs to be diluted to 1.000 L from a concentrated solution using the dilution method. When determining the volume of 18 M sulfuric acid required, we arrive at
V1C1 = V2C2
V1 = (0.60M H2SO4) (1L) / (18M H2SO4)
V1 = 0.033L = 33mL
To prepare the solution, we dilute 33 mL of 18 M sulfuric acid to 1.00 L.
A substance's molarity (M) is the volume of solution in which it is present. The amount of a solute in moles per liter of a solution is known as molarity. A solution's molar concentration is another name for molarity.
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the equilibrium of 2h 2 o(g) 2h 2 (g) o 2 (g) at 2,000 k has a k eq value of 5.31 x 10 -10 . what is the mass action expression for this system?
The mass expression for the system is K= (aH₂)² × aO₂ / (aH₂O)² = 5.31× 10⁻¹⁰.
we may derive mass action expression out from equation above,
K= (aH₂)² × aO₂ / (aH₂O)² = 5.31× 10⁻¹⁰.
what is mass action expression ?An equation that compares the product activities increased towards the power of its coefficients to the reactant activity increased to the power of its coefficients is known as the mass action expression.
As much that you have a balanced equation to use as a guide, it is fairly simple to construct the expression correctly. So let's think about the subsequent generic aqueous solution reaction. The coefficient for that species is represented by each of the lowercase letters.The reaction quotient / concentration fraction are other names for the mass-action expression.The letter Q stands for mass-action expression (also known as reaction quotient or concentration fraction).To know more about mass action expression visit:
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identify which of the following functional groups appear in the molecule daumone. (note that some of the functional groups in daumone will not be listed as an answer option)
The functional groups in daumone;
- alcohol
- ether
- carboxylic acid
What is a functional group?A functional group is an atom, group of atoms or bond that is responsible for the chemical reactivity of the members of a homologous series. The homologous series refers to a family of compounds that have similar reactivity.
We know that organic molecule are almost always known to contain carbon. The functional groups in the molecule could help us to know the kind of reactions that could occur in the molecule since the reactions could only occur at the functional groups in the molecule as shown.
Let us now consider the compound daumone which has been found to be responsible for the hibernation of worms. The functional groups in the molecule are;
- alcohol
- ether
- carboxylic acid
These are the known functional groups that we can see in the molecule as shown above in the question.
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Which atom has the highest ionization energy?
O K
O zn
O Se
O Ca
The least amount of energy necessary to liberate the most loosely bound electron from an isolated gaseous atom, positive ion, or molecule is known as the ionization energy.
Which atom has the highest ionization energy?
KZnSeCaSe (Ionization energy 97542) has the highest out of Potassium, Zinc and Calcium.
A chemical element with the atomic number 34 and the symbol Se is selenium. It is a nonmetal (occasionally referred to as a metalloid) that shares characteristics with arsenic and has features halfway between sulfur and tellurium in the periodic table. In the crust of the Earth, it hardly ever exists in either its elemental state or as pure ore complexes.
The energy required to remove one mole of electrons from an atom and produce a positively charged selenium ion is known as the ionization of selenium energy.
Se -> Se+ + e-
Although this procedure can be performed numerous times, the energy cost rises sharply each time. The selenium's general equation is:
SeN+ -> Se(N+1)+ + e-
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is it the pair of angles are supplementary. m/A = 120° and m/B = 60°
this is not one of the three processes for saturating air with water vapor lowering the temperature to the dew point mixing cold air with warm, moist air increasing the carbon dioxide content of air adding water vapor to the air
The process which does not saturate air with water vapor is increasing the carbon dioxide content of air.
What is saturation of air?
The term "saturated air" refers to an air volume that can store the most water vapor at a particular temperature. The air's water-vapor content as compared to its saturation level is known as relative humidity.
It is said that air is saturated when it has a 100% relative humidity, or when it can store as much water vapor as it can for a given temperature. Warm air is used to dry goods because it absorbs moisture and increases the amount of water it can store when saturated air is heated (relative humidity decreases).
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an atomic orbital defines the of finding an electron in a particular region of an atom. this electron density is defined by the square of the schroedinger function.
The answer for the particular question is probability and Schrodinger wave function.
The correct question would be :
an atomic orbital defines the __________ of finding an electron in a specific region of an atom. this electron density is referred by the square of the Schrodinger __________ function.
An atomic orbital is 3d structure where electrons are moving.
The Schrodinger wave equation connects the energy of an atom to its electrons with regard to the wave function of the electron. Each solution to the equation indicate an permits energy state of the atom and is connected with a specific atomic orbital.
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In order for phospholipids to form bilayers spontaneously in an aqueous environment, the ph should be?
The ph must be close to neutral for phospholipids to spontaneously form bilayers in an aquatic environment.
What is phospholipid bilayer?
Important elements of cell membranes are phospholipid bilayers. A barrier preventing molecules and ions from entering and leaving the cell is the lipid bilayer. The ability to selectively permit the passage of specific molecules into and out of cells, however, is a crucial function of the cell membrane.
A polar membrane that has two layers of lipid molecules makes up the lipid bilayer. All cells are surrounded by these membranes, which are flat sheets.
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What is the longest-wavelength em radiation that can eject a photoelectron from a certain metal, given that the binding energy is 2.3 ev?
262 nanometers would be a longest potential wavelength that would even eject a photoelectron from silver and this is shorter than the lower limit of the visible range which is about 380 nanometers so it is ultraviolet light.
What is the longest wave-length that can generates electrons?The longest-wavelength light that generates an electron to be ejected from a gaseous lithium atom is 520 nm. Gaseous lithium atoms are illuminated with light of wavelength 400 nm.
Violet light of wavelength 400 nm discharges electrons with a maximum kinetic energy of 0.860 eV from sodium metal.
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If 4.5 l of antifreeze solution (specific gravity = 0.80) is added to 3.8 l of water to make a 8.3 l mixture, what is the specific gravity of the mixture?
The specific gravity of the mixture is 0.89.
Antifreeze volume = 4.5L
Specific gravity of antifreeze = 0.80
Water volume = 3.8L
Specific gravity of water = 1
Specific gravity of the mixture =
(volume of water * water specific gravity + volume of antifreeze * antifreeze sg) / volume of mixture
= (3.8 * 1 + 4.5 * 0.80) / 8.3
= 0.89
A measurement of a substance's density in relation to water's density is its specific gravity, which is more officially known as relative density. In general, specific gravity is calculated for solids and liquids in respect to water in its densest condition (at a temperature of 4 Celsius or 39.2 Fahrenheit), and for gases in relation to air at room temperature.
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What type of orbitals best describe the bond between the adjacent oxygens in peroxyacetic acid?
sp³-sp³ type of bonds best describes the bond between the adjacent oxygen.
What are orbitals?An atomic orbital is a function that describes the position and wave-like activity of an electron in an atom in terms of both atomic theory and quantum mechanics. This function may be used to determine the likelihood of discovering any atom's electron in any certain area surrounding the nucleus.
The electron cloud model is used by chemists to map out the electrons' atomic orbitals; these probability maps are not all spherical. The periodic table's trends can be predicted in part by their forms.
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bimetallic cooperativity with a 2-phosphinoimidazole-derived pd(ii) dimer enables naphthalene synthesis via dimeric pd(iii) catalysis.
Through an unprecedented coupling of aryl iodides and methyl ketones in the presence of silver triflate, these complexes with distinctive catalytic activity enable the quick synthesis of 1,3-disubstituted naphthalenes.
What is the process of naphthalene synthesis?
A methyl ketone is first arylated on a Pd catalyst, and then it is cyclized with a second equivalent of a ketone to complete the transition. This ketone arylation process is significant since it takes place in oxidizing circumstances, which points to the use of dimeric Pd catalysts with greater oxidation states.
The mechanism involving Pd(III) bimetallic catalysis at a high oxidation state on the basis of measurements and DFT calculations. We confirm the significance of the palladium catalyst for both arylation and cyclization for naphthalene production because these new bimetallic complexes exhibit reactivity that is not seen with monometallic Pd catalysts.
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What is the w/w % of an aqueous solution of ammonia at 14.3 M, with a density of 0.900 g/mL.
The w/w % of an aqueous solution of ammonia is 27.01%.
w/w % or "weight by weight" is the proportion of a particular substance within a mixture, measured by weight or mass.
c(NH₃) = 14.3 M; concentration of ammonia solution
d(NH₃) = 0.900 g/mL; density of ammonia solution
V(NH₃) = 100 mL = 0.1 L; chosen volume of ammonia solution
M(NH₃) = 17 g/mol; molar mass of ammonia
ms(NH₃) = d(NH₃) × V(NH₃)
ms(NH₃) = 0.900 g/mL × 100 mL
ms(NH₃) = 90 g; mass of ammonia solution
m(NH₃) = c(NH₃) × V(NH₃) × M(NH₃)
m(NH₃) = 14.3 M × 0.1 L × 17 g/mol
m(NH₃) = 23.31 g; mass of pure ammonia (solute)
w/w % = m(solute) / m(solution) × 100%; formula to calculate w/w %
w/w % = 23.31 g / 90 g × 100%
w/w % = 27.01%
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please helpp i am behind.
Energy is the ability to do work and kinetic energy is energy in motion.
What is a variable?Our aim in an experiment is to determine the effect of one variable on another. The independent variable is the variable that is manipulated in the experiment while the dependent variable is the variable that changes as we manipulate the independent variable.
We now have to ask ourselves what is manipulated and what changes as we manipulate that variable. Every experiment must have these dependent and independent variables. Here, we need to find out the independent variable and dependent variables in any chosen any problems.
For instance, I want to measure the effect of fertilizer on plant growth. Plant growth is the dependent variable while fertilizer application is the independent variable.
A possible hypothesis is; if fertilizer is applied to the plant, the plant grows better.
Energy is the ability to do work and kinetic energy is energy in motion.
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How human being made
Answer: Human evolution is the lengthy process of change by which people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years
Explanation:
Chiswick house was designed by richard boyle, better known as ________, to reflect the style of the ancient greeks and romans.
Chiswick house was designed by Richard Boyle, better known as Lord Burlington to reflect the style of the ancient Greeks and Romans.
Give a brief introduction about Chiswick house.In the Chiswick neighborhood of London, England, stands Chiswick House, a Neo-Palladian villa. The home, a "glorious" example of Neo-Palladian construction in west London, was planned and constructed in 1729 by Richard Boyle, 3rd Earl of Burlington (1694-1753). 26.33 hectares are taken up by the house and garden (65.1 acres). One of the first examples of an English landscape garden, the garden was primarily designed by architect and landscape designer William Kent.
The Cavendish family rented out the property as it fell into disrepair in the 19th century. Starting in 1892, it served as the Chiswick Asylum, a psychiatric hospital.
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Describe an experiment which shows that chlorine is more reactive than iodine. Include an equation in your answer.
Answer:
Create a solution of chloride water and add a colouless solution of potassium iodide... The mixture will turn red-brown because iodine has been displaced proving that it is less reactive than chlorine
Cl2 (aq) + 2KI (aq) --> 2KCl (aq) + I2 (aq)
Which element in Period 2 has the least mass
Answer: Lithium has the least mass.
Explanation: Period 2 of the Periodic Table includes the following elements:
• Carbon
• Nitrogen
• boron
• Lithium
• beryllium
• Neon
• oxygen
• fluorine
Clarification
Out of these elements, lithium has the least mass, which is 6.941 units. The element with the most mass on the other hand is neon, which has a mass of approximately 20.1797 units.
Final answer: The element in Period 2 of the Periodic Table with the least mass is lithium.