Answer:
The electron configuration of magnesium (Mg) in its neutral state is 1s2 2s2 2p6 3s2. When magnesium loses two electrons to form a magnesium ion with a 2+ charge (Mg2+), its electron configuration becomes 1s2 2s2. This means that the 3s2 subshell is now empty, and the magnesium ion has a full outer shell with a total of two electrons. The electron configuration of Mg2+ can also be written as [Ne] 3s2.
HOPE IT HELPSWhat is the equilibrium? Does the safe's owner believe the thug's threat? Does the safe's owner open the safe? What is the subgame perfect Nash equilibrium? A. The Nash equilibrium is for the owner to open the safe and for the thug to only kill if the owner does not open the safe. B. The Nash equilibrium is for the owner to open the safe and for the thug to kill regardless of whether the owner opens the safe. C. The Nash equilibrium is for the owner to not open the safe and for the thug to only kill if the owner does not open the safe. D. The game does not have a Nash equilibrium. E. The Nash equilibrium is for the owner to open the safe and for the thug to not kill regardless of whether the owner opens the safe.
The thug will only murder if the owner opens the safe, according to the Nash equilibrium, which calls for the owner to do so. The game lacks a Nash equilibrium.
What exactly is equilibrium?Chemical equilibrium refers to the situation in a chemical process where both the reagents are present at levels that have no additional tendency to change over time, preventing any discernible change in the system's properties.
What elements influence equilibrium?The system's heat, pressure, and concentration all have an impact on equilibrium. The game's equilibrium is disturbed when one these possible unintentional, and it adjusts until it finds equilibrium once more.
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Why are unbalanced equations NOT useful in
chemistry?
Answer:
If the numbers of each type of atom are different on the two sides of a chemical equationExplanation:
What state of matter is steam?
A. Gas
B. Liquid
C. Solid
D.Transitive
Answer:
Steam is an invisible gas
Explanation:
so A. Gas
Answer:
gas
Explanation:
which condition is caused by nitrogen bubbles and requires the use of a decompression chamber?
Decompression sickness is caused by nitrogen bubbles and requires the use of a decompression chamber.
Decompression sickness, also known as generalised barotrauma or the bends, refers to injuries produced by a sudden drop in the pressure that surrounds you, which can be caused by either air or water. It most typically happens in scuba or deep-sea divers, although it can also occur during high-altitude or unpressurized air travel.
Decompression sickness occurs when there is a sudden decrease in pressure (for example, during rise from a dive, escape from a caisson or hyperbaric chamber, or ascent to altitude), which causes gas previously dissolved in blood or tissues to develop bubbles in blood vessels. Pain, neurologic problems, or both are common complaints. Milder symptoms come from the production of bubbles in the skin or joints, but high numbers of bubbles in the venous circulation might cause lung injury.
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The pressure and temperature inside a bike tire is 10 atm and 10 K respectively. What will the pressure become in the tire when the temperature is increased 20 k?
Answer:20 atm
Explanation:
Which, if any, of the substances had resonance structures? How many resonance structures did each substance have?
SO2, NO2- and CO2 all have resonance structures among all the other species that were mentioned in the question.
The question is incomplete, the complete question is;
Which if any, of the substances had resonance structures? How many resonance structures did each substance have?
CCl4 ,H2O, CO2 ,H2O ,CH4 ,C2H4 ,CH2O ,CH3OH ,CH3NH2 ,NF3 ,[NH4]+ ,[NO2]- ,SO2 , OF2 ,H2S ,SF6 , ICl5
Resonance is an idea introduced by Linus Pauling to explain the bonding in compounds where a single Lewis structure can not fully account for the bonding in the molecule. In such compounds, no single Lewis structure satisfactorily explains all the properties of the molecule.
Among the options listed, the following molecules exhibit resonance;
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Calculate the volume in L of 11.6 moles of Neon at 120 K when it has a pressure of 25.9 atm
Answer:
The volume of the gas is approximately 4.41 liters
Explanation:
The details of the data of the Neon gas are;
The number of moles of Neon gas present, n = 11.6 moles
The temperature of the sample of Neon gas, T = 120 K
The pressure of the sample of the Neon gas, P = 25.6 atm
By the ideal gas equation, we have;
P·V = n·R·T
Where;
R = The universal gal constant = 0.08205 L·atm·mol⁻¹·K⁻¹
Therefore, we get;
V = n·R·T/P
Which gives;
V = 11.6 moles × 0.08205 L·atm·mol⁻¹·K⁻¹ × 120 K/(25.9 atm) ≈ 4.4097915 L
The volume of the gas, V ≈ 4.41 L.
how many grams of o2 are required to produce 100. g of so2? fes2 o2 -----> fe2o3 so2
To produce 100 g of SO₂, 160 g of O₂is required.
How much O₂ is needed to produce 100 g of SO₂?In the given chemical equation, 1 mole of FeS₂ reacts with 3 moles of O₂ to produce 1 mole of Fe₂O3 and 2 moles of SO₂. The molar mass of FeS₂ is 119.98 g/mol, while the molar mass of SO₂ is 64.07 g/mol.
To find the amount of O₂ required to produce 100 g of SO₂, we need to calculate the molar mass of SO₂ and use it to determine the molar ratio between O₂ and SO₂.
The molar mass of SO₂ is 64.07 g/mol, so 100 g of SO₂ is equal to 100 g / 64.07 g/mol = 1.5619 moles of SO₂.
According to the balanced equation, 2 moles of SO₂ are produced from 3 moles of O₂. Thus, we can set up a proportion to find the amount of O₂ required:
2 moles SO₂ / 3 moles O₂ = 1.5619 moles SO₂ / x moles O₂
Cross-multiplying and solving for x, we get:
3 moles O₂ = (2 moles SO₂ * x moles O₂) / 1.5619 moles SO₂x moles O₂ = (3 moles O₂ * 1.5619 moles SO₂) / 2 moles SO₂x moles O₂ = 2.34285 moles O₂Finally, to convert moles to grams, we multiply the number of moles by the molar mass of O₂, which is 32 g/mol:
x grams O₂ = 2.34285 moles O₂ * 32 g/mol = 74.8576 g O₂
Therefore, approximately 74.86 grams of O₂ are required to produce 100 g of SO₂.
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Which electron in an atom (Z=17) is the most shielded from
nuclear charge?
A. an electron in the 2s
B. an electron in the 3p
C. an electron in the 3d
D. an electron in the 1s
Answer:
option no. C is correct
an electron in the 3d
A student mixes 25g of NaCl with 100.g of H₂O at 25°C . What is the percent concentration of the resulting solution?
20.
25
0.20
0.25
20 %
Explanation:
becuz 25 divided by 125 multiplied by 100 is 20
What model of the atom resulted from the observations that cathode rays are deflected towards a positively charged rod?
A.) Positive particles dispersed in an area of negative charge
B) Positive particles surrounded by orbiting negative particles
C) Negative particles surrounding a dense positive center
D) Negative particles dispersed in an area of positive charge
A compound has a molecular weight of 112. 124 atomic mass units and the empirical formula C3H4O. What is the molecular formula of the compound? Use the periodic table to help you. A. C6H8O B. C9H12O3 C. C8H4O2 D. C4H8O2 E. C6H8O2.
The molecular formula of the compound which has a molecular weight of 112.124 atomic mass units is C₆H₈O₂.
What is molecular formula?Molecular formula of any compound tells about the composition and numbers of each entities present in that molecule.
Steps involved in the prediction of molecular formula:
First we predict the molar mass of given emperical formula as:Molar mass of C₃H₄O = 3(12) + 4(1) + 16 = 56
Now we divide the given mass by the calculated mass of empirical formula:112.124/56 = 2
Now we multiply the subscripts of given empirical formula by this whole number and we get:Molecular formula = (C₃H₄O)₂ = C₆H₈O₂
Hence correct option is (E).
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12. Determine the number of moles of boric acid that react in the equation to produce 10 moles of water.
In the preceding equation, 6.67 moles of boric acid (\(H_3BO_3\)) will react to generate 10 moles of water (\(H_2O\)).
To determine the number of moles of boric acid that react in the equation to produce 10 moles of water, we need to examine the balanced chemical equation and use stoichiometry.
1. Begin by examining the balanced chemical equation for the reaction involving boric acid and water. Let's assume the equation is:
\(3H_2O\) + \(3H_2O\) -> \(B_2O_3\) + \(6H_2O\)
2. From the balanced equation, we can see that 2 moles of boric acid (H3BO3) react with 3 moles of water (\(H_2O\)) to produce 6 moles of water (\(H_2O\)).
3. Use the given information that 10 moles of water (\(H_2O\)) are produced. Since the stoichiometric ratio between boric acid and water is 2:3, we can set up a proportion to find the number of moles of boric acid:
2 moles \(H_3BO_3\) / 3 moles \(H_2O\) = x moles \(H_3BO_3\) / 10 moles \(H_2O\)
4. Cross-multiply and solve for x:
(2 moles \(H_3BO_3\))(10 moles \(H_2O\)) = (3 moles \(H_2O\))(x moles \(H_3BO_3\))
20 moles \(H_2O\) = 3x moles \(H_3BO_3\)
5. Divide both sides of the equation by 3 to isolate x:
x moles \(H_3BO_3\) = (20 moles \(H_2O\)) / 3
6. Calculate the value of x:
x moles \(H_3BO_3\) ≈ 6.67 moles \(H_3BO_3\)
Therefore, approximately 6.67 moles of boric acid (\(H_3BO_3\)) will react to produce 10 moles of water (\(H_2O\)) in the given equation.
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The equilibrium constant of a reaction requires certain environmental variables to remain constant. These variables are _____.
pressure, temperature, and concentration
temperature and concentration
pressure, temperature, and time
None of the above.
The equilibrium constant of a reaction requires certain environmental variables to remain constant. These variables are pressure, temperature, and concentration. The correct option is A.
An equilibrium constant is a mathematical tool that enables the quantification of the extent of a chemical reaction. The equilibrium constant is symbolized by Keq, and it is utilized to determine the concentration of reactants and products present at equilibrium.
This calculation is done using the law of mass action.Keq is defined as the ratio of product concentrations to reactant concentrations in a chemical reaction taking place at equilibrium. The concentrations used in the expression for Keq are equilibrium concentrations.
As a result, Keq is a constant for a given reaction at a specific temperature. Keq is dependent on a variety of environmental variables such as temperature, pressure, and concentration. To keep the equilibrium constant stable, these variables must remain constant.
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Belle’s grandfather lives in a region where the temperature drops below 0°F at night. When Belle visited her grandfather, they hiked up a hill. Belle noticed that a lot of rocks had cracks in them. She also found quite a few rocks that had split into pieces. What most likely caused the rocks in this region to weather?
Answer : Normally all molecular motions seizes at 0k which is -272oC so the temperature can't go below that
Explanation:
But, the rocks cracked because of too much expansion. Generally at night, water can be found within rocks which then evaporates during the day. And when water is cold or freezed it expands. So, as the water in the rock expands it causes an increase in size until a certain level where it can no more expand, it cracks.What causes the split of the rock is due to the expansion of water as it freezes
Answer:The answer is B
Explanation:
which of the following statements is true concerning a dynamic chemical equilibrium? select all that apply. multiple select question. the amounts of reactant and product do not change over time. the amounts of reactants and products is the same. the rates of the forward and reverse reactions are the same. the reaction has stopped.
The statements which are true concerning a dynamic chemical equilibrium are the rates of the forward and reverse reactions are the same, the amounts of reactants and products is the same.
Dynamic Equilibrium: What Is It?Dynamic equilibrium is the condition of a system where the reversible reaction that is occurring in it ceases changing the ratio of reactants to products, but there is still movement of substances in the reaction. Chemical equilibrium is dynamic because under this equilibrium condition the concentrations of reactant and product are unchanged and the forward and backward reaction velocities are equal.
How is the Le Chatelier principle defined?The Le Chatelier principle is as follows: A movement in the equilibrium's location counteracts the effect of a change in one of the variables that characterizes a system at equilibrium.
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A sample of 4.30 moles of NH3 gas occupies 6.50 L at 45°C. Calculate the pressure of the gas in atm.
The pressure of the NH3 gas is 2.19 atm, a sample of 4.30 moles of NH3 gas occupies 6.50 L at 45°C.
What is a gas pressure?Gas pressure is the force per unit area exerted by a gas on the walls of its container. It is a measure of the number of gas molecules colliding with the container's walls per unit of time, and is proportional to the number of gas molecules and their kinetic energy. It is a result of the gas molecules moving randomly in all directions and colliding with the walls of the container. When a gas is confined in a container, its pressure is exerted equally in all directions. The pressure is a scalar quantity, which means it has only magnitude and does not have a direction.
Gas pressure can be measured in a variety of units, including atmospheres (atm), torr, pascals (Pa), and pounds per square inch (psi). The most commonly used units for measuring gas pressure are atmospheres and pascals.
Calculation of Gas PressureTo calculate the pressure of a gas, the Ideal Gas Law is used which states that \(PV = nRT\), where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
First step: Convert the temperature from Celsius to Kelvin:
45°C + 273.15 = 318.15 \(K\)
Second step:Plug in the values and solve for P:
\(P = (nRT) / V\)
\(P = (4.30 moles * 0.0821 Latm/molK * 318.15 K) / 6.50 L\)
\(P = 2.19 atm\)
So, the pressure of the \(NH3\) gas is 2.19 \(atm\).
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what elements could be in the gas when sodium bicarbonate and citric acid react
What is the percentage of metal in a sample of CaSO4?
Answer:
Calcium is the metal so its 29.439%
Explanation:
Calcium Ca 29.439%
Oxygen O 47.008%
Sulfur S 23.553%
a 24.6 ml sample of 0.389 m ethylamine, c2h5nh2, is titrated with 0.325 m hydroiodic acid. at the equivalence point, the ph is .
At the equivalence point of a titration between 24.6 mL of 0.389 M ethylamine, C2H5NH2, and 0.325 M hydroiodic acid, the pH is 0.
At the equivalence point of a titration between 24.6 mL of 0.389 M ethylamine, C2H5NH2, and 0.325 M hydroiodic acid, the pH is 0. The equation for the reaction is:
C2H5NH2 + HI → C2H5NH3+ + I-
The number of moles of hydroiodic acid, HI, needed to reach the equivalence point is equal to the number of moles of ethylamine, C2H5NH2. To calculate this, use the following equation:
Moles of HI = Moles of C2H5NH2
Volume of C2H5NH2 x Molarity of C2H5NH2 = Volume of HI x Molarity of HI
24.6 mL x 0.389 M = Volume of HI x 0.325 M
Volume of HI = 24.6 mL x 0.389 M / 0.325 M
Volume of HI = 30.53 mL
At the equivalence point, the pH of the solution is 0.
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In the reaction A + B C, doubling the concentration of A doubles the reaction rate and doubling the concentration of B doubles the reaction rate. Which statement best describes this reaction? A. It is a second-order reaction in A and a second-order reaction in B. B. It is a first-order reaction in A and a second-order reaction in B. C. It is a first-order reaction in A and a first-order reaction in B. D. It is a second-order reaction in A and a first-order reaction in B. E. It is a zero-order reaction with respect to both reactants.
Answer:
B. It is a zero-order reaction with respect to both reactants
Explanation:
In the reaction A + B C, doubling the concentration of A doubles the reaction rate, and doubling the concentration of B doubles the reaction rate. Which statement best describes this reaction?
Calculate the pH and the equilibrium concentration of S²- in a 6.89x10-2 M hydrosulfuric acid solution, H₂S (aq). For H₂S, Ka1 = 1.0x10-7 and Ka_2 = 1.0×10-1⁹ pH = [S²] = M
Therefore, the pH and the equilibrium concentration of S²⁻ in a 6.89x10⁻² M hydrosulfuric acid solution are pH = 7.78 and [S²⁻] = 2.31x10⁻¹¹ M.
Hydrosulfuric acid (H₂S) is a weak acid that dissociates in water to produce hydrogen ions (H⁺) and bisulfide ions (HS⁻). H₂S(aq) + H₂O(l) ⇌ H₃O⁺(aq) + HS⁻(aq)
The bisulfide ions (HS⁻) in turn reacts with water to produce hydronium ions (H₃O⁺) and sulfide ions (S²⁻).
HS⁻(aq) + H₂O(l) ⇌ H₃O⁺(aq) + S²⁻(aq) Ka1
= 1.0x10⁻⁷,
Ka2 = 1.0x10⁻¹⁹
To calculate the pH and the equilibrium concentration of S²⁻ in a 6.89x10⁻² M H₂S(aq) solution, we must first determine if H₂S(aq) is a strong or weak acid.
It has Ka1 = 1.0x10⁻⁷, which is a very small value; thus, we can conclude that H₂S(aq) is a weak acid.
To calculate the equilibrium concentration of S²⁻ in a 6.89x10⁻² M H₂S(aq) solution, we need to use the Ka2 value (Ka2 = 1.0x10⁻¹⁹) and a chemical equilibrium table.
[H₂S] = 6.89x10⁻² M[H₃O⁺] [HS⁻] [S²⁻]
Initial 0 0 0Change -x +x +x
Equilibrium (6.89x10⁻² - x) x xKa2 = [H₃O⁺][S²⁻]/[HS⁻]1.0x10⁻¹⁹
= x² / (6.89x10⁻² - x)
Simplifying: 1.0x10⁻¹⁹ = x² / (6.89x10⁻²)
Thus: x = √[(1.0x10⁻¹⁹)(6.89x10⁻²)]
x = 2.31x10⁻¹¹ M
Thus, [S²⁻] = 2.31x10⁻¹¹ M
To calculate the pH of the solution, we can use the Ka1 value and the following chemical equilibrium table.
[H₂S] = 6.89x10⁻² M[H₃O⁺] [HS⁻] [S²⁻]
Initial 0 0 0
Change -x +x +x
Equilibrium (6.89x10⁻² - x) x x
Ka1 = [H₃O⁺][HS⁻]/[H₂S]1.0x10⁻⁷
= x(6.89x10⁻² - x) / (6.89x10⁻²)
Simplifying: 1.0x10⁻⁷ = x(6.89x10⁻² - x) / (6.89x10⁻²)
Thus: x = 1.66x10⁻⁸ M[H₃O⁺]
= 1.66x10⁻⁸ M
Then, pH = -log[H₃O⁺]
= -log(1.66x10⁻⁸)
= 7.78 (rounded to two decimal places)
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Only the largest stars more than 10 times the size of the Sun will go
supernova and possibly become black holes.
O True
O Flase
Write the name of (NH4)3PO4
Iconic or covalent
Given that 1 mile = 160934 cm, calculate the height of a stack of one mole of
pennies in miles. (Hint: begin the conversion with 1 mole of pennies.) Show your work.
The distance to the nearest star, Alpha Centauri, is 2.6 x 10^13 miles.
Answer: 1 mole of stacked pennies would reach a height of 5.69x10^17 miles.
Explanation: The U.S. penny has a thinkness of 1.52mm. One mole of pennies would have:
(1 mole pennies)(6.02x10^23 pennies/mole)*(1.52mm/penny) = 9.15x10^23 mm for 1 mole of pennies. One mile = 1.609x10^6 mm.
(9.15x10^23 mm)/( 1.609x10^6 mm/mile) = 5.69x10^17 miles for 1 mole of pennies.
That would reach Alpha Centauri (5.69x10^17 miles/2.6 x 10^13 miles)= 2.19x10^4 times.
There is a coin shortage in the US, so good luck. Send me your spare pennies.
[Note: I did this quickly, so please check the work. A mole is indeed a big number, but . . .]
Select two correct answers.
[]class
[]organism
[] fungi
[]kingdom
4. Ava is an amazing swimmer and can swim 1000 meters in 360 seconds. What is her average speed in m/s?
Answer:
Speed =Distance /Time =1000/360=2.78m/s
difference between a mixture and a compound?
Explanation:
Mixture is physically combined while compound is chemically combined
Answer:
A mixture is physical, while a compound is chemical.
Explanation:
A mixture is a combination of two or more substances that are physically mixed together. The components of a mixture can be easily separated from one another by physical means, such as filtration or evaporation. The substances in a mixture retain their individual properties and do not chemically react with one another. For example, a mixture of salt and sand can be separated by dissolving the salt in water and then filtering the mixture to remove the sand particles. Each component of the mixture retains its own properties throughout the process. On the other hand, a compound is a substance that is made up of two or more different elements chemically combined in fixed proportions. The components of a compound are held together by chemical bonds, resulting in a new substance with different properties from the original elements. Compounds cannot be easily separated into their individual components by physical means. For example, water (H2O) is a compound made up of hydrogen and oxygen. The elements hydrogen and oxygen chemically react to form water, and it is not possible to separate the hydrogen and oxygen in water by physical means alone. In summary, a mixture is a physical combination of substances that can be easily separated, while a compound is a chemical combination of elements that cannot be easily separated. Mixture components retain their individual properties, while compounds have properties different from their component elements.
looking down the ca-cb bond in the molecule below (your head must be oriented at the top of the screen), which newman-projection would be correct? g
Total eclipse refers to the configuration where the two largest groups lie directly behind one another. The most energy is found in this configuration. Using a line to represent the front atom and a circle to represent the back carbon
The Newman projection, which is useful in alkane stereochemistry, shows how a chemical bond is arranged from front to back. Distal refers to the carbon atom towards the back, whereas proximal refers to the carbon atom in the front. The reason why the anti-staggered conformation is more stable than the gauche and eclipsed conformations is that the bulky groups are arranged opposite to one another, which reduces the steric hindrance between the groups and increases the stability of the molecule.
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Photographic film contains silver bromide in gelatin. Once exposed, some of the silver bromide decomposes, producing fine grains of silver. The unexposed silver bromide is removed by treating the film with sodium thiosulfate. Soluble sodium silver thiosulfate (Na3Ag(S2O3)2) is produced.
AgBr(s) + 2 Na2S2O3(aq) Na3Ag(S2O3)2(aq) + NaBr(aq)
Determine the mass of Na3Ag(S2O3)2 produced if 0.360 g AgBr is removed.
Oki
so heres the formula:
\(2 {2.(0 \frac{ \frac{5 \frac{ \leqslant { {3 {2 { { \frac{5}{?} }^{2} }^{2} }^{2} }^{?} }^{?} }{?} }{?} }{?} }^{2} \)