The correct option is (b) We can't know for sure whether or not the mass changed, but it seems reasonable to claim that the mass did not change, given that the ranges of uncertainty overlap.
The overlap of the ranges of uncertainty for each measurement indicates that the masses of the solution before and after the reaction are consistent with each other. However, this does not provide definite proof that the mass did not change, as there is still some uncertainty associated with the measurements. The student's conclusion is reasonable, given the information provided, but further investigation is needed to determine if the mass did actually stay the same.
In scientific experiments, it is common to make multiple measurements of a quantity and report the results along with the associated uncertainty. The uncertainty represents the degree of precision with which the measurement was made, and it is typically expressed as a range of values. In this case, the student made two measurements of the mass of the solution with an uncertainty of 0.05 g, and the results were 50.25 g ± 0.05 g for both measurements.
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if a reaction is first order with a rate constant of 0.0450 s⁻¹, how much time is required for 65% of the initial quantity of reactant to be consumed?
It will take approximately 26.5 seconds for 65% of the initial quantity of reactant to be consumed in this first-order reaction.
The integrated rate law for a first-order reaction is:
ln([A]t/[A]0) = -kt
where [A]t is the concentration of a reactant at time t, [A]0 is the initial concentration, k is the rate constant, and ln is the natural logarithm.
To solve for t when 65% of the initial quantity of reactant is consumed, we can use the following steps:
Determine the concentration of reactant remaining after 65% is consumed:
[A]t = (1 - 0.65) [A]0 = 0.35 [A]0
Rearrange the integrated rate law to solve for time t:
t = -ln([A]t/[A]0) / k
Substitute the given values and solve for t:
t = -ln(0.35) / 0.0450 s⁻¹
t ≈ 26.5 seconds
Therefore, it will take approximately 26.5 seconds for 65% of the initial quantity of reactant to be consumed in this first-order reaction.
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compound is 53.31% c, 53.31 % c , 11.18% h, 11.18 % h , and 35.51% o 35.51 % o by mass. what is its empirical formula? insert subscripts as needed.
The mole ratio tells us the simplest whole-number ratio of the atoms in the compound. Therefore, the empirical formula of the compound is:
C2H5O.
To find the empirical formula of the compound, we need to determine the simplest whole-number ratio of the atoms in the compound. We can assume that we have 100 g of the compound, and use the percentages given to find the masses of each element in those 100 g:
Mass of C = 53.31 g
Mass of H = 11.18 g
Mass of O = 35.51 g
Next, we need to convert these masses to moles, using the molar mass of each element:
Moles of C = 53.31 g / 12.01 g/mol = 4.44 mol
Moles of H = 11.18 g / 1.01 g/mol = 11.07 mol
Moles of O = 35.51 g / 16.00 g/mol = 2.22 mol
We can then divide each of the mole values by the smallest mole value to get the mole ratio:
Moles of C = 4.44 mol / 2.22 mol = 2.00 mol
Moles of H = 11.07 mol / 2.22 mol = 4.98 mol
Moles of O = 2.22 mol / 2.22 mol = 1.00 mol
The mole ratio tells us the simplest whole-number ratio of the atoms in the compound. Therefore, the empirical formula of the compound is:
C2H5O.
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Find the ionic and net ionic equation for HC2H3O2 + Mg(OH)2 = Mg(C2H3O2)2 + H2O
The ionic and net ionic equations for HC₂H₃O₂ + Mg(OH)₂ → Mg(C₂H₃O₂)₂ + H₂O is 2H⁺ + 2(C₂H₃O₂)⁻ + Mg²⁺ + 2 (OH)⁻ → Mg ²⁺ + 2(C₂H₃O₂)⁻ + 2H⁺ + 2OH⁻.
Ion equations are chemical equations that display the ions involved in a process. Ions that mix in a solution to create new compounds, to put it another way. Spectator ions are the ions that do not participate. While a complete ionic equation also shows the spectator ions, a net ionic equation shows the chemical species engaged in the reaction.
Thus, 2H⁺ + 2(C₂H₃O₂)⁻ + Mg²⁺ + 2 (OH)⁻ → Mg ²⁺ + 2(C₂H₃O₂)⁻ + 2H⁺ + 2OH⁻ is the net ionic equation.
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Draw the structure of the product of the reaction of propylmagnesium bromide with benzaldehyde. Assume that the reaction is worked up by the addition of dilute aqueous acid. Click the "draw structure" button to launch the drawing utility.
The reaction taking place between propyl magnesium bromide and benzaldehyde is Grignard reaction. The product obtained is an alcohol.
What is Grignard reaction?An organometallic chemical reaction in which an alkyl, aryl, allyl or aryl magnesium halides reacts with the carbonyl group of aldehyde or ketone is known as Grignard reaction.
The reaction of CH₃CH₂CH₂MgBr and C₆H₅CHO is given below.
In this reaction, propyl magnesium bromide acts as a Grignard reagent which reacts with the benzaldehyde to form alcohol as the product in the presence of dilute aqueous acid.
This type of reaction is important for the formation of C-C bonds.
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Propane burns completely in oxygen according to the equation shown.
C3H8 (g)+50₂ (g)=3CO₂ (g)+4H₂O(g)
If 0.1 mole of propane gas is burnt completely. What colume of gaseous product is obtained,
measured at room temperature and pressure?
Answer:
17.1L
Explanation:
use ideal gas law
PV=nRT
101.325x = 0.7 x 8.314 x 298.15
^
Solve for x
X = 17.12424525 ~~ 17.1L
Answer:
17.11 L
Explanation:
The molar volume of a gas at room temperature (25°C) and pressure (1 atm) is 24.45 L/mol.
0.1 mole of propane reacts with oxygen to form 0.1 x 3 = 0.3 mole of carbon dioxide and 0.1 x 4 = 0.4 mole of water vapor.
The total volume of the gaseous products is 0.3 + 0.4 = 0.7 mole of gas.
Therefore, the volume of gaseous products obtained from the complete combustion of 0.1 mole of propane is 0.7 x 24.45 L/mol = 17.11 L.
draw the products formed when the following alkene is treated with o3 followed by zn, h2o. be sure to answer all parts.
The given alkene can undergo ozonolysis in the presence of ozone (O3) followed by reduction with zinc (Zn) and water (H2O) to yield two products.
The ozonolysis reaction cleaves the double bond in the alkene and generates two carbonyl compounds, which can then be reduced by zinc to form aldehydes or primary alcohols depending on the reaction conditions.
The ozonolysis of the given alkene, 2-methyl-2-pentene, results in the formation of two carbonyl compounds: propanal and 2-methylpropanal. These carbonyl compounds can then undergo reduction with zinc and water to form the corresponding aldehydes or primary alcohols.
The reduction of propanal with zinc and water results in the formation of propan-1-ol, which is a primary alcohol. The reaction involves the addition of hydrogen atoms to the carbonyl group of propanal, followed by the removal of the resulting oxygen atom as water. The reduction of 2-methylpropanal with zinc and water results in the formation of 2-methylpropan-1-ol, which is also a primary alcohol. The reduction mechanism is similar to that of propanal, but with the addition of hydrogen atoms to the carbonyl group of 2-methylpropanal instead.
In summary, the products formed when 2-methyl-2-pentene is treated with ozone followed by zinc and water are propan-1-ol and 2-methylpropan-1-ol. These products are formed by ozonolysis of the alkene to generate carbonyl compounds, followed by reduction of the carbonyl compounds to primary alcohols with zinc and water. This reaction demonstrates the versatility of ozonolysis and reduction reactions in synthesizing aldehydes and primary alcohols from alkenes, which are important building blocks in organic chemistry.
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at what temperature does water freeze when thrown in the air?
Hot Water freeze when thrown in the air immediately at the temperature of -42 degrees.
In an extremely cold setting, hot water sprayed into the air rapidly freezes before it touches the ground.
The question in the headline of this essay might seem fit for a science exam in primary school, but the solution is far more nuanced than it first seems. Water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, and 273.15 Kelvin, as we have all been taught. Yet it isn't always the case. Scientists have discovered liquid water at -40 degrees Fahrenheit in clouds and have even cooled water in the laboratory to -42 degrees Fahrenheit.
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it takes 675 j of work to compress quasi-statically 0.60 mol of an ideal gas to one-ninth its original volume. calculate the temperature of the gas (in k), assuming it remains constant during the compression.
The ideal gas has a temperature of 180.6 Kelvin. A huge number of tiny particles that are constantly moving and only interact with one another during collisions make up an ideal gas, which is a hypothetical gas.
The formula for the relationship between work and volume change for an ideal gas at constant temperature can be used to solve this issue: W=-nRT ln(V2/V1). where V1 is the starting volume, V2 is the finished volume, n is the number of moles of gas, R is the gas constant, T is the temperature in Kelvin, and W is the work done on the gas. We know that W = 675 J, n = 0.60 mol, V1 = 1, and V2 = 1/9 in this situation. To solve for the temperature T, we can rearrange the expression as follows: T = -W ln(V2/V1) nR. When we enter the values, we obtain: T is equal to -675 J / (0.60 mol * 8.31 J/mol*K * ln(1/9)). T = 180.6 K. The gas is therefore 180.6 Kelvin in temperature.
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The element with the electron configuration 1s² 2s²2p^4 is
The element with the electron configuration 1s² 2s²2p⁴ is oxygen.
What is electron configuration?Electron configuration in chemistry describes how electrons are distributed in its atomic orbitals.
Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence.
The atomic number of the element is used to create the electron configuration. This means that an element with electron configuration 1s² 2s²2p⁴ is oxygen because it has an atomic number 8.
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Can enzymes be reused for the same chemical reaction?
Which statement best compares a gamma ray to a radio wave?
O A gamma ray has more energy than a radio wave because it has a shorter wavelength
and a higher frequency.
O A gamma ray has more energy than a radio wave because it has a longer wavelength
and a higher frequency.
O A gamma ray has more energy than a radio wave because it has a shorter wavelength
and a lower frequency.
O A gamma ray has more energy than a radio wave because it has a longer wavelength
and a lower frequency.
The phrase "A gamma ray has more energy than a radio wave since it has a shorter wavelength and a higher frequency" is the most accurate way to compare them.
Radio waves and gamma rays: how do they compare?Gamma rays have the highest frequency, shortest wavelengths, and most energy. The EM radiation types with the lowest energy, longest wavelengths, and lowest frequencies, on the other hand, are radio waves.
How fast are radio waves and gamma rays travelling?All types of electromagnetic radiation, including microwaves, visible light, and gamma rays, move through a vacuum at the speed of light (c), which is the speed of all electromagnetic radiation.
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Consider the following reaction:
2H2(g) + O2(g) → 2 H₂O(g)
-
How many liters of H₂ are required to produce a total of 2 moles
of H₂O at STP?
89.4 L
67.2 L
44.8 L
22.4 L
44.8 liters of H₂ are required to produce a total of 2 moles of H₂O at STP. Therefore, option C is correct.
What is stoichiometry ?The term stoichiometry is defined as the determination of the proportions in which elements or compounds react with one another.
The rules followed in the identification of stoichiometric relationships are based on the laws of conservation of mass and energy and the law of combining weights or volumes.
The balanced reaction is:
2 H₂ + O₂ → 2 H₂O
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
H₂ - 2 moles
O₂- 1 mole
H₂O - 2 moles
The STP conditions refer to the standard temperature and pressure, which values are 0 °C and 1 atmosphere as a reference values for gases. In these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
For calculate the number of moles of O₂ required, you can observe the stoichiometry of the reaction. By reaction stoichiometry 2 moles of H₂O are produce by 2 moles of H₂.
Then, you can apply the following rule of three:
if by definition of STP conditions 1 mole of H₂ occupies a volume of 22.4 liters, 2 moles occupy how much volume?
volume = (2 moles× 22.4 L)/ 1 L
= 44.8 L
Thus, 44.8 liters of H₂ are required to produce a total of 2 moles of H₂O at STP, option C is correct.
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A student performs four trials of an investigation to determine the boiling point of water. How should the student handle the results? (1 point)
O The student should use the value that is closest to 100°C.
O The student should take the average of the results from all four trials.
O The student should use the maximum value of the results.
O The student should take the average of the minimum and maximum value of the results.
Answer:
The student should take the average of the results from all four trials.
Explanation:
Answer:
The student should take the average of the results from all four trials.
Explanation:
The correct option is to take the average of the results from all four trials. This will give the most accurate representation of the boiling point of water, as it takes into account any measurement errors or variations. The value closest to 100°C or the maximum value of the results could be skewed due to a large measurement error or an outlier. Taking the average of the minimum and maximum value of the results is also not ideal as it does not fully consider the results from all four trials.
ALLEN
What is the term for the amount of solute in moles per kilogram of solvent?
Molality is the number of moles of solute per kilogram of solvent and is a temperature-independent unit of concentration that is used in many applications in chemical and biological systems.
The term for the amount of solute in moles per kilogram of solvent is "molality." Molality is defined as the number of moles of solute per kilogram of solvent. It is a unit of concentration that is used in chemical and biological systems, especially in the study of solutions.
Molality is often used instead of other units of concentration, such as molarity, because it is temperature-independent. This means that the molality of a solution does not change with changes in temperature, whereas the molarity of a solution does change with temperature. This property makes molality a useful unit for many applications, such as calculating freezing point depression, boiling point elevation, and osmotic pressure.
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Write the net ionic equation for the precipitation reaction that occurs when aqueous magnesium chloride is mixed with aqueous sodium phosphate. Be sure to include the physical states of all species. Determine the mass of precipitate that forms when 125 mL of 0.222 M aqueous magnesium chloride it mixed with 225 mL of 0.105 M aqueous sodium phosphate.
The net ionic equation for the precipitation reaction when aqueous sodium phosphate and magnesium chloride are combined is 3MgCl2 (aq) + 2Na3(PO4) (aq) -----> Mg3(PO4)2 (s) + 3Na+ (aq) + 3Cl- (aq).
Taken moles of magnesium chloride equal 0.125 * 0.22, or 0.02775 moles.
Taken moles of sodium phosphate equal 0.225*0.105, or 0.023625 moles.
Magnesium chloride is the limiting reagent in the process, according to stoichiometry.
Hence, the moles of magnesium phosohate that will develop are: 0.02775/3 = 0.00925
Mass of magnesium phosphate ppt is therefore equal to moles*MW = 0.00925*263 = 2.432 g.
MgCl2 and H2 are produced when solid magnesium interacts with HCl. It goes like this: Mg(s) + 2HCl(aq) = MgCl2(aq) + H2 (g). HCl and solid magnesium carbonate react to form MgCl2, CO2, and H2O.
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if a student dissolved benzoic acid in dcm and then added aqueous sodium hydroxide, how many layers would form? would benzoic acid still be present? in which layer? use a flow chart or equations to accompany your explanation.
When benzoic acid is dissolved in dichloromethane (DCM) and then aqueous sodium hydroxide is added, the solution will form two layers, an organic layer (DCM) and an aqueous layer.
Benzoic acid is a weak acid and will partially dissociate in water to form the benzoate anion and a hydronium ion (H3O+). When sodium hydroxide is added to the solution, it will react with the hydronium ion to form water and sodium ion. This will shift the equilibrium towards the formation of more benzoate anion, which is a water-soluble salt. The benzoate anion will then partition into the aqueous layer.
On the other hand, DCM is a nonpolar solvent that is immiscible with water. Benzoic acid is a weak acid with a pKa of 4.2, which means that it is only partially dissociated in DCM. As a result, benzoic acid will be predominantly present in the organic layer as the undissociated acid.
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for the experiment, an initial concentrated solution of sodium chloride will be made with ~30 grams of sodium chloride and ~100 ml of water. determine the weight percentages of sodium chloride and water in the solution. using the linear equation, determine the theoretical density of the initial concentrated solution.
The weight percentages of sodium chloride is 23.1 % and water is 76.9 % in the solution. The theoretical density of the initial concentrated solution is 0.30 g/mL.
The mass of the sodium chloride = 30 g
The mass of the water = 100 mL = 100 g
The total mass = 30 + 100
= 130 g
The mass percentage of sodium chloride = (30 / 130 ) × 100 %
= 23.1 %
The weight percentage of the water = ( 100 / 130 ) × 100 %
= 76.9 %
The density of the solution = mass / volume
= 30 / 100
= 0.30 g/mL
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What is the acceleration when a running horse slows down from 15 m/s to 3 m/s in 2 seconds ??
Answer:
Explanation:
The acceleration can be calculated using the following formula:
acceleration = (final velocity - initial velocity) / time
In this case:
acceleration = (3 m/s - 15 m/s) / 2 seconds = -6 m/s^2
So the horse slows down with an acceleration of -6 meters per second squared. Note that the negative sign indicates that the direction of the acceleration is opposite to the direction of motion.
Fill the Blank!? the process of making glucose from noncarbohydrate sources is called ________.
Gluconeogenesis...
[tex] \: \: \: [/tex]
Answer:
Gluconeogenesis is the answer...
how does water never fall off the earth? this is for science
Water (and everything else) stays on Earth due to the combination of gravity and atmospheric pressure.
What is Atmosphericc Pressure?
Atmospheric pressure is the force exerted by the weight of the Earth's atmosphere on the surface below it. The Earth's atmosphere is composed of a mixture of gases, primarily nitrogen (78%) and oxygen (21%), along with other trace gases. These gases have mass and are attracted towards the center of the Earth by the force of gravity.
The pressure of the atmosphere decreases with increasing altitude because there is less atmosphere above, meaning that there is less weight and therefore less force pressing down. At sea level, the average atmospheric pressure is around 101.3 kilopascals (kPa) or 14.7 pounds per square inch (psi). This pressure can be measured with devices such as barometers.
Water on Earth does not fall off into space due to the force of gravity. Gravity is the force that attracts objects towards each other. The Earth's gravity is what keeps everything on the planet, including water, from floating away into space. As long as an object is within the Earth's gravitational field, it will be attracted towards the center of the planet.
Furthermore, the Earth's atmosphere also helps to keep water from falling off the planet. The atmosphere creates a layer of air around the Earth, which creates pressure that holds water molecules in place. This pressure is also caused by gravity, as the weight of the atmosphere presses down on everything below it, including water.
In summary, water (and everything else) stays on Earth due to the combination of gravity and atmospheric pressure.
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name the type of chemical reaction that occurs when magnesium chloride solution (mgcl2) reacts with sodium carbonate solution (na2co3).
A double displacement reaction, also known as a precipitation reaction, occurs when magnesium chloride solution (MgCl2) reacts with sodium carbonate solution (Na2CO3).
The balanced chemical equation for the reaction is
MgCl2 (aq) + Na2CO3 (aq) → MgCO3 (s) + 2NaCl (aq)
In this reaction, the magnesium ion (Mg2+) from MgCl2 reacts with the carbonate ion (CO32-) from Na2CO3 to form solid magnesium carbonate (MgCO3) and aqueous sodium chloride (NaCl). This reaction is a double displacement reaction because the positive and negative ions in the reactants switch places to form the products. Additionally, the formation of a solid product, magnesium carbonate, indicates that this reaction is also a precipitation reaction.
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Draw the products formed when the following alkene is treated with O3 followed by Zn, H2O. Be sure to answer all parts.
When an alkene is treated with O3 (ozone), it undergoes an oxidative cleavage reaction, also known as ozonolysis.
The overall reaction can be represented as follows:
Alkene + O3 → Ozonide Intermediate → Carbonyl Compound 1 + Carbonyl Compound 2
When an alkene is treated with zinc (Zn) metal, it undergoes a reduction reaction known as the "reductive coupling" or "dimerization" of alkenes.
The exact mechanism of the reaction can vary depending on the structure of the alkene and the reaction conditions, but the general reaction can be represented as follows:
2 Alkene molecules + Zn → Dimerized product
For example, when ethene (C2H4) is treated with zinc, it undergoes reductive coupling to form but-2-ene (C4H8) as the dimerized product:
2 C2H4 + Zn → C4H8
When an alkene is treated with water (H2O), it can undergo either hydration or hydrolysis, depending on the reaction conditions.
Alkene + H2O → Alcohol
When an alkene is treated with beryllium (Be) metal, it can undergo a reduction reaction known as beryllium-catalyzed reduction. This reaction is also known as the Sabatier- Senderens reaction.
The general reaction can be represented as follows:
Alkene + H2 (as a source of H) + Be → Alkane
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which substance would be classified as a carbohydrate?A. glycogenB. nucleotidesC. amino acidsD. lipids
The substance which is classified as the carbohydrates among the following option is Glycogen option A.
Carbohydrates represent a class or organic composites whose primary function is to give energy to an organism. Carbohydrates are made from monomers of glucose, fructose, and/ or galactose.
Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storehouse in creatures, fungi, and bacteria. It's the main storehouse form of glucose in the mortal body.
Glycogen functions as one of two forms of energy reserves, glycogen being for short- term and the other form being triglyceride stores in adipose towel( i.e., body fat) for long- term storehouse. In humans, glycogen is made and stored primarily in the cells of the liver and cadaverous muscle.
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which of the gases has the fastest‑moving molecules, on average, at a given temperature?
HBr
NO2
C2H6
They all have same average speed
among the three gases listed, NO2 would have the fastest-moving molecules on average at a given temperature.
According to the kinetic theory of gases, the average kinetic energy of gas molecules is proportional to their absolute temperature. At a given temperature, gases with lighter molecules will have higher average speeds compared to gases with heavier molecules. This is because the lighter molecules have less mass and therefore can move more quickly for a given amount of kinetic energy. Therefore, among the three gases listed, NO2 would have the fastest-moving molecules on average at a given temperature. This is because NO2 has the lowest molecular weight (46 g/mol) compared to HBr (81 g/mol) and C2H6 (30 g/mol). The faster movement of NO2 molecules is reflected in their higher root-mean-square speed, which is a measure of the average speed of gas molecules in a sample. However, it is important to note that the average speed of gas molecules can vary depending on factors such as temperature, pressure, and the specific conditions of the gas sample.
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How do you calculate freezing point?
The freezing point depression of a solution can be calculated using the equation:
ΔTf = Kf * molality
The freezing point of a solution is the temperature at which the solution changes from a liquid to a solid. The freezing point of a pure solvent is a well-known and characteristic property, but the freezing point of a solution is lower than that of the pure solvent due to the presence of solute particles.
ΔTf = Kf * molality
where ΔTf is the change in freezing point, Kf is the freezing point depression constant for the solvent, and molality is the concentration of solute in moles per kilogram of solvent.
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which solution has a lower boiling point? question 6 options: a 1.5m c2h6 solution a 0.75m nacl solution all four solutions have the same boiling point a 1.5m c3h8 solution a 0.5m mgcl2 solution
Ebullioscopy is the process of finding lower boiling point so that result is NaCl
Ebullioscopy is the process of changing the boiling point of a substance by adding a nonvolatile solute; T = W is the formula used to determine the temperature change. I where I is the Van't Hoff factor and W is equal to nsolute/msolvent. Since each material has the same molarity, n is constant across the board.
I is equal to the initial/final particles.
AlCl₃ dissociates atAl⁺³ and 3Cl⁻, resulting in 4 final particles and 1 initial particle, I = 4/1 = 4; NaCl dissociates at Na⁺ and Cl⁻ resulting in 2 final particles and 1 initial particle, I = 2/1 = 2; and MgCl₂ dissociates at Mg⁺² and 2Cl⁻, resulting in 3 final particles and 1 initial particle, I = 3/1 = 3.C₆H₁₂O₆ does not dissociates. The solution containing AlCl₃ will therefore have the highest T and, as a result, the Low boiling point is NaCl.
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Rank these elements from strongest to weakest coulombic attraction Neon, Lithium, potassium, radon, helium, nitrogen, Praseodymium, aluminum
Elements from strongest to weakest coulombic attraction: helium> Lithium> nitrogen> neon> aluminium > potassium> radon > praseodymium
What causes the Coulomb effect?
According to Coulomb's law, the attraction between two charged particles is inversely proportional to their separation and inversely proportional to the size of their charges. To put it simply, there are stronger attraction forces between particles the higher the charge.
The attraction between particles with opposing charges is known as coulombic attraction. For instance, the electrons that surround the nucleus of an atom are attracted to the protons that make up its nucleus. This is due to the protons' positive charge and the electrons' negative charge. The atomic radius decreases and the number of protons in the nucleus increases as you move over the period. Both contribute to increased Coulombic attraction, which necessitates greater energy expenditure to eliminate first electron.
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Which of Newton's laws can be expressed with the equation = mā?
A. Newton's first law
B. Newton's third law
C. Newton's law of universal gravitation
D. Newton's second law
SUBMIT
Answer:
D. Newton's second law
Explanation:
Use the periodic table to determine the electron configuration for Br and Y in noble-gas notation.
Br:
[He]2s22p63s23p5
[Ne]3s23p4
[Ar]4s24p5
[Ne]3s23p5
[Ar]4s24p5 is the electron configuration for Br and Y in noble-gas notation on Using the periodic table.
Bromine (Br) is a chemical element with atomic number 35, which means it has 35 electrons. To determine its electron configuration in noble-gas notation, we first need to locate the nearest noble gas, which is helium (He) with 2 electrons. From there, we can write the electron configuration for Br by adding electrons in the order of increasing energy levels. Starting from the He configuration, we add the electrons for the next energy levels: 2s2, 2p6, 3s2, and 3p6. Finally, we add the remaining 5 electrons in the 4th energy level, giving us the noble-gas notation [Ar]4s24p5 for Br. Yttrium (Y), on the other hand, is a metal element with atomic number 39, which means it has 39 electrons. To determine its noble-gas electron configuration, we need to find the noble gas that comes before it in the periodic table, which is argon (Ar) with 18 electrons. Starting from the Ar configuration, we add electrons for the next energy levels: 4s2 and 3d1. This gives us the noble-gas notation [Kr]5s24d1 for Y. Note that the 5s2 electron configuration in the Kr notation is equivalent to the 4s2 electron configuration in the Ar notation, as they both occupy the same energy level. Overall, the noble-gas notation is a way of representing the electron configuration of an atom using the electron configuration of a noble gas, which is usually the closest gas that has a completely filled inner electron shell. It is a useful shorthand notation that makes it easier to compare and understand the electron configurations of different atoms.
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Which of the following most likely happens when the temperature of a gas increases?
The pressure of the gas decreases.
The number of collisions of gas particles increases.
The number of collisions of gas particles remains the same.
The pressure of the gas remains the same.
Please explain your answer
