An anion reaction with a metal and forms a -3 charge. How many atoms of the metal would be required if the element is in group 1 on the periodic table?
Answers
Answer:
3 atoms
Explanation:
The number of atoms of the metal that would be required as it forms an anionic charge of -3 is 3 atoms.
Elements in group 1 generally have a charge of +1. They have a valency of 1
By the virtue of this;
It will take 3 atoms of a group one element to combine with an anion with a -3 charge on it.
This way, the ionic bond forms and the compound becomes neutral.
Related Questions
Heyyy, dans mon DM de physique, il y a une question que je n'arrive absolument pas à répondre (je suis en seconde)
Pourriez-vous m'aider pour y répondre svp :)
"Sachant qu'une mole de carbonate de calcium pèse 100g et une mole d'acide éthanoïque 60g. Quel est le réactif limitant ? Justifier par un calcul détaillé"
Answers
there is not have enough magnesium to react with all the titanium tetrachloride. If this point is not clear from the mole ratio, calculate the number of moles of one reactant that is required for complete reaction of the other reactant. For example, there are 8.23 mol of Mg, so (8.23 ÷ 2) = 4.12 mol of TiCl4 are required for complete reaction. Because there are 5.272 mol of TiCl4, titanium tetrachloride is present in excess. Conversely, 5.272 mol of TiCl4 requires 2 × 5.272 = 10.54 mol of Mg, but there are only 8.23 mol. Therefore, magnesium is the limiting reactant.
How many atoms of each element are present in one formula unit of each compounds (a).hg2 cl2
Answers
In one formula unit of the compound Hg2Cl2, there are a total of three elements: mercury (Hg) and chlorine (Cl).
To determine the number of atoms for each element, we need to look at the subscripts in the chemical formula. The subscript 2 next to Hg tells us that there are two atoms of mercury in one formula unit. Similarly, the subscript 2 next to Cl tells us that there are two atoms of chlorine in one formula unit.
Therefore, in one formula unit of Hg2Cl2, there are:
- 2 atoms of mercury (Hg)
- 2 atoms of chlorine (Cl)
It is important to note that the subscripts in a chemical formula represent the number of atoms of each element in one formula unit of the compound. In this case, the subscripts of 2 indicate that there are two atoms of each element in one formula unit.
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Question 28 (4 points)
Complete the following table:
Substance
pH
POH
[H] M
A
3.45
B
0.26
For the concentration fill in the blank, I used a decimal with a leading zero and two sig figs.
Answers
Answer:
Pls type your question in another manner cos I really cant decipher what you wrote the way you typed this pls
what is the entropy of this collection of training examples with respect to the target function classification?
Answers
Deciding whether or not to approve a mortgage Future changes in consumer purchase tendencies can be predicted using classification models.
A mortgage is a kind of loan used to buy or keep up real estate, such as a home, piece of land, or other construction. The borrower agrees to make a series of monthly payments, divided into principal and interest, to the mortgage lender. This frequently emerges as a succession of regular, weekly episodes. After then, the asset is forfeited as loan collateral.
Borrowers are need to fill out an application with their selected lender and fulfill a number of criteria, such as down payments and minimum credit scores. Before going on to the closing stage, mortgage applications must pass a stringent underwriting procedure.
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Which of the following statements is true about nuclear fusion? (4 points)
It occurs in the sun.
A heavy atom is split.
It can be controlled easily.
An electron is lost by the atom.
Answers
Let's understand Nuclear fusion first:
Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles.In the core of the Sun, hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.Nuclear fusion reactions are difficult to control.Fusion does not produce nuclear waste, only the core of the reactor remains radioactive and only for 100 years.Learn more:
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the codon for phenylalanine is uuu. which of the following codons also most likely encodes for phenylalanine? group of answer choices aaa cuu uuc auu aug
Answers
The codon for phenylalanine is UUU. When we talk about genetic code, it is important to understand that it follows a specific pattern and is universal, meaning that it is the same in all living organisms.
The codon for phenylalanine is UUU. When we talk about genetic code, it is important to understand that it follows a specific pattern and is universal, meaning that it is the same in all living organisms. In this pattern, three nucleotides (A, U, C, G) make up a codon, which corresponds to a specific amino acid. In this case, UUU is the codon for phenylalanine.
Now, looking at the options given, we have AAA, CUU, UUC, AUU, and AUG. Out of these, CUU is most likely to encode for phenylalanine. This is because the genetic code follows a specific pattern where one amino acid can have multiple codons that code for it. For example, phenylalanine has two other codons that can also encode for it - UUC and UUA. CUU is the closest to the original codon UUU and only differs in the first nucleotide. This difference in the first nucleotide will not affect the resulting amino acid, as the third nucleotide is the one that determines the amino acid.
Therefore, the answer is CUU.
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if equal amounts of liquid and powder are used to create a bead, it is called a _____ bead.
Answers
If equal amounts of liquid and powder are used to create the bead, it is called a dry bead.
If twice as much liquid as the powder is used to create the bead, it is called a wet bead.
A dry bead is a type of dental material that is formed by mixing equal amounts of liquid and powder. The mixture creates a bead that has a dry and crumbly texture. Dry beads are commonly used in dentistry for procedures such as taking impressions or making temporary restorations.
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Of the following elements ____ can form a rare +4 ion *
a) Aluminum
b) Lead
c) Krypton
d) Uranium
Answers
Answer:
d is the answer.........
Which of these solids are most likely amorphous solids? Select all that apply. Rubber sugar plastic candle wax graphite glass.
Answers
Answer:
Rubber, plastic,candle wax, graphite glass
Explanation:
they all lack internal structure
The solids are characterized as amorphous and crystalline solids based on the arrangement of atoms. The solids that are amorphous are rubber, plastic, candle wax, and glass.
What are amorphous solids?The solids have the arrangement of atoms in the lattice. The solids with an appropriate arrangement of atoms are crystalline solids. For example, sugar, graphite.
The solids with irregular arrangements of atoms in the lattice are amorphous solids. For example, glass, rubber.
Thus, the solids that are amorphous in nature are rubber, plastic, candle wax, and glass.
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At 35C, K 1.6 105 for the reaction Calculate the concentrations of all species at equilibrium for each of the following original mixtures. a. 2.0 mol pure NOCl in a 2.0-L flask
Answers
For both mixtures, the concentrations of all species (NOCl, NO, and Cl₂) at equilibrium would be zero, indicating that the reaction does not proceed significantly in the forward direction under the given conditions and equilibrium constant value.
To calculate the concentrations of all species at equilibrium for the given mixtures, we can use the concept of the reaction quotient (Q) and the equilibrium constant (K). The reaction quotient (Q) is calculated in the same way as the equilibrium constant (K), but it is evaluated at any given point during the reaction, not just at equilibrium. At equilibrium, Q is equal to K.
The balanced chemical equation for the reaction is:
2 NOCl(g) ⇌ 2 NO(g) + Cl₂(g)
a. 2.0 mol pure NOCl in a 2.0 L flask:
In this case, we have an initial concentration of 2.0 mol NOCl in a 2.0 L flask. Since the reaction starts with pure NOCl, the initial concentrations of NO and Cl₂ are zero.
At equilibrium, let's assume the concentrations of NOCl, NO, and Cl₂ are [NOCl], [NO], and [Cl₂], respectively.
Using the given equilibrium constant expression K = 1.6 × 10⁻⁵, we can set up the equilibrium expression as follows:
K = [NO]²[Cl₂] / [NOCl]²
Since the initial concentrations of NO and Cl₂ are zero, we can simplify the expression:
K = [NO]²[Cl₂] / [NOCl]²
1.6 × 10⁻⁵ = (0)²(0) / [NOCl]²
1.6 × 10⁻⁵ = 0 / [NOCl]²
1.6 × 10⁻⁵ = 0
Since the equilibrium constant is not satisfied, it indicates that the reaction does not proceed in the forward direction. Therefore, at equilibrium, the concentrations of all species would be zero.
b. 2.0 mol NOCl and 1.0 mol Cl₂ in a 1.0 L flask:
In this case, we have an initial concentration of 2.0 mol NOCl and 1.0 mol Cl₂ in a 1.0 L flask. The initial concentration of NO is zero since it is not included in the original mixture.
At equilibrium, let's assume the concentrations of NOCl, NO, and Cl₂ are [NOCl], [NO], and [Cl₂], respectively.
Using the given equilibrium constant expression K = 1.6 × 10⁻⁵, we can set up the equilibrium expression as follows:
K = [NO]²[Cl₂] / [NOCl]²
Substituting the initial concentrations into the equilibrium expression:
1.6 × 10⁻⁵ = [NO]²[Cl₂] / [NOCl]²
Since the initial concentration of NO is zero, we can simplify the expression:
1.6 × 10⁻⁵ = 0²[Cl₂] / [NOCl]²
1.6 × 10⁻⁵ = 0 / [NOCl]²
1.6 × 10⁻⁵ = 0
Similarly to the previous case, the equilibrium constant is not satisfied, indicating that the reaction does not proceed in the forward direction. Therefore, at equilibrium, the concentrations of all species would be zero.
In summary, for both mixtures, the concentrations of all species (NOCl, NO, and Cl₂) at equilibrium would be zero, indicating that the reaction does not proceed significantly in the forward direction under the given conditions and equilibrium constant value.
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At 35 ?C, K = 1.6 × 10-5 for the reaction
2 NOCl(g) ⇌ 2 NO(g) + Cl₂(g)
Calculate the concentrations of all species at equilibrium for each of the following original mixtures.
a. 2.0 mol pure NOCl in a 2.0 L flask
b. 2.0 mol NOCl and 1.0 mol Cl2 in a 1.0 L flask
Predicting Products Given a set of reactants, choose the most likely products. Fe + K3As
K3 + Fe3As
K + FeAs
As+ K3Fe
no reaction
Answers
The expected reaction is "no reaction." Iron (Fe) and Potassium Arsenide (K₃As) do not react to form the listed products, option D.
What are the roles of reactants in a reaction?The reactants in a chemical reaction are the starting materials that undergo a transformation to form new substances, which are known as products. They play a crucial role in determining the outcome of the reaction, as the type and amount of reactants can affect the speed, yield, and type of products formed.
In a chemical reaction, the reactants react with one another, breaking and forming bonds, to create new chemical species. The change in reactants results in the formation of different products, which in turn can go on to participate in further reactions. "No reaction" is the expected response. The listed products are not formed by the reactions of iron (Fe) and potassium arsenide (K₃As).
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Given the set of reactants, the most likely outcome would be that there is no reaction.
Feasibility of a reactionConsidering the reaction: \(Fe + K_3As\)
Fe cannot displace K in solution because potassium is higher on the reactivity series than Fe.
In the same vein, Fe cannot react with K. In other words, Fe can neither displace K from the solution nor can it react with K. Hence, no reaction can occur as far as the equation is concerned.
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in a typical reverse-phase lc procedure, decreasing the polarity of the mp will most likely have what effect on the peaks in the chromatogram? a. the plate height of the peaks will decrease b. tm for the system will increase c. the retention factors for all non-polar compounds will increase d. the resolution of the peaks will increase e. tm for the system will decrease f. the efficiency of the peaks will increase g. the retention times of the peaks will increase h. the retention times of the peaks will decrease
Answers
In a typical reverse-phase LC procedure, decreasing the polarity of the mobile phase will most likely have the following effects on the peaks in the chromatogram: The tm for the system will decrease, and the retention times of the peaks will increase. Option E, and G are correct.
When the polarity of the mobile phase decreases, the overall polarity of the system decreases as well, and the non-polar compounds will have a stronger affinity for the non-polar stationary phase, resulting in a decrease in tm. The retention times of the peaks will increase because the non-polar compounds will spend more time interacting with the non-polar stationary phase.
The other options are incorrect because: The plate height of the peaks will decrease: This is not necessarily true and depends on several factors, such as column efficiency, flow rate, and injection volume.
The tm for the system will increase: This is the opposite of what happens when the polarity of the mobile phase decreases.
The retention factors for all non-polar compounds will increase: This is also the opposite of what happens when the polarity of the mobile phase decreases.
The resolution of the peaks will increase: This is not necessarily true and depends on the specific compounds being analyzed and the chromatographic conditions.
The efficiency of the peaks will increase: This is not necessarily true and depends on several factors, such as column efficiency, flow rate, and injection volume.
The retention times of the peaks will decrease: This is the opposite of what happens when the polarity of the mobile phase decreases.
Hence, E. G. The tm for the system will decrease, the retention times of the peaks will increase is the correct option.
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The solubility of H2S gas in water at 20 oC and 1 atm pressure is 258 mL (measured at STP) per 100 g H2O. (a) What is the mass percent of dissolved H2S
Answers
The mass percent of dissolved H₂S in the solution is 18.8%, when solubility is given as 258ml dissolving in 100 grams of water at STP.
Initially, we would determine the mass of H₂S that dissolves in 100 g of water:
According to the solubility, 258 mL of H₂S gas dissolves in 100 g of water at STP.
Also, the density of H₂S gas at STP = 0.08988 g/mL.
Therefore, the mass of H₂S (solute) that dissolves in 100 g of water is:
258 mL H₂S x 0.08988 g/mL
= 23.19 g H₂S
Total mass of the solution:
= 100 g of water + 23.19 g of H₂S
= 123.19 g.
The mass percent of H₂S in the solution is:
= Mass of the solute/mass of the solution x 100
= (23.19 g H₂S / 123.19 g solution) x 100% = 18.8%
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In order to model a chemical change in the laboratory, a student wants to select the appropriate measuring apparatus to record the reaction. Which apparatus could be used to detect that a chemical change occurred with a substance in a laboratory setting? Select ALL that apply.
A) The student could use a hand lens to see if the original substance had been crushed into smaller particles.
B) The student could perform an odor test to detect if a new smell emerges from the interaction of the substance in the lab.
C) The student could test whether gas was released during the interaction of the substance with another substance in the lab.
D) The student could use a spatula to determine if a precipitate/solid formed at the bottom of the beaker containing the substance. Eliminate E) The student could use a balance and a volumetric flask to determine the mass and volume of the substance in order to determine its density.
Answers
Answer:
b,c,d
Explanation:
bc i got it right
The apparatus that could be used to detect that a chemical change occurred with a substance in a laboratory setting are as follows:
The student could perform an odor test to detect if a new smell emerges from the interaction of the substance in the lab.The student could test whether gas was released during the interaction of the substance with another substance in the lab.Thus, the correct options for this question are B and C.
What is a Chemical change?A chemical change may be defined as an alteration in the properties of one material into another. New materials or substances are formed with different properties along with appearance. It results when a substance combines with another to form a new substance.
An odor test and detecting the liberation of gas in the experiment are some of the best ways to reveal whether a chemical change may occur during the reaction or not, while the rest of the options are not as much as practical.
Therefore, the correct options for this question are B and C.
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characteristic of a chemical compound
Answers
Answer:
Hello Adam Here!!!
Explanation:
A chemical compound has the following characteristics: (i) A chemical compound is obtained by the chemical combination of two or more elements in a definite proportion by mass. (ii) Compounds are homogeneous, i.e. their properties are the same throughout.
Happy to Help! =)
2.
What did five different witnesses see in the area where Mary Lou Arruda
disappeared?
A. Mary Lou talking to an unknown man.
B. A green car driven by an unknown man.
C. Mary Lou's bicycle in the trunk of a green car.
D. An unknown man on foot following Mary Lou .
Answers
Answer:
c
Explanation:
I believe its c but i could be wrong sorry if I am
How does Chemistry prepare you, in your career?
Answers
Answer:
Chemistry provides an excellent foundation for careers in a variety of professions and occupations in academia, government, and industry, and in diverse fields such as environmental sciences, pharmaceuticals, medicine, materials, energy, oceanography, education, health, aerospace, law, and education.
Explanation:
Answer: Hi friend! Sorry if I'm incorrect but Chemistry can prepare you for many careers. Specifically in the scientific area.
Explanation:
If you're studying to get a Chemistry major. I think chemistry shows a way of objectifying and trying to find reasons in order to solve real world application problems. When you think about it chemistry is a guide to showing you current events, such as environment and technological advances.
Identify the gas from it calculated molar mass. P = 103.2 kPa V = 225 mL T = 25.00 *C m= 0.375 g N2 Ar CO2 Kr O2 H2 Og Xe H2O He Ne
Answers
Answer:
Not sure yet but I will get back
Explanation:
need help with 11 and 12 please and thank you!!!
Answers
Holding a toast will not help in preventing Johny from dying of hypothermia as the thermal energy produced by holding a hot toast is not sufficient to maintain the thermal energy of the body.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
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what concern does methane gas production create for the operation of a sanitary landfill?
Answers
To mitigate these concerns, landfill operators often implement methane gas collection and control systems. These systems involve the installation of gas collection wells and the extraction of methane for beneficial use, such as generating electricity or fueling industrial processes. Such measures help reduce methane emissions, minimize environmental impact, and enhance the overall operation and safety of the landfill.
The production of methane gas in a sanitary landfill creates several concerns for its operation:
Greenhouse Gas Emissions: Methane (CH4) is a potent greenhouse gas, contributing to global warming and climate change. Landfills are significant sources of methane emissions due to the decomposition of organic waste. Methane has a much higher global warming potential than carbon dioxide (CO2), so its release into the atmosphere is a significant environmental concern.Odor and Air Quality: Methane is odorless, but it is often accompanied by other foul-smelling gases produced during the decomposition process. The release of these gases can cause unpleasant odors and negatively impact air quality in the surrounding area, affecting the health and well-being of nearby residents.Fire and Explosion Hazard: Methane is highly flammable and can form explosive mixtures with air at certain concentrations. Accumulated methane in the landfill can create the risk of fires or explosions if ignited. Proper management and control of methane gas are essential to minimize these hazards.Landfill Stability: Methane production can contribute to the generation of internal gas pressure within the landfill, leading to potential instability. Excessive gas pressure can cause landfill cover damage, increase the risk of slope failure, or result in the release of gas from unintended pathways, such as through the soil or nearby infrastructure.To learn more about Methane, visit:
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Mauren and Esteban have been investigating various reactions to find out if they are exothermic or endothermic
Which of these reactions are endothermic and which are exothermic
Answers
the reaction of ch3ch2mgbr with ch3coch2ch3 gives: group of answer choices the racemate of a chiral product. none of the above a single enantiomer. a mixture of diastereomers. an achiral product.
Answers
The reaction of CH₃CH₂MgBr with CH₃COCH₂CH₃ gives the product , the right answer of choice is : an achiral product.
An achiral product is the identical with its mirror image. the achiral compound is superimposable on its mirror image. an achiral product is the product which is as same as its mirror image . the achiral compound is superimposable. while the chiral object is not identical with its mirror image. the chiral compound is not superimposable it its mirror image.
Thus, an achiral product is formed by the reaction of the CH₃CH₂MgBr with CH₃COCH₂CH₃ which is superimposable to its mirror image.
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Arrange the following compounds in decreasing (highest to lowest) order of boiling point. CH_3CH_2CH_2CH_2NH_2 CH_3CH_2N(CH_3)_2 CH_3CH_2CH_2NHCH_3
Answers
In order to determine the boiling point of a compound, we need to consider the strength of intermolecular forces between its molecules. The stronger the intermolecular forces, the higher the boiling point.
In this case, all three compounds are primary amines, which means they have a nitrogen atom bonded to two hydrogen atoms and one carbon atom. When comparing the boiling points of primary amines, the key factor to consider is the size of the alkyl groups attached to the nitrogen atom. The larger the alkyl group, the stronger the intermolecular forces, and therefore the higher the boiling point.
So, in decreasing order of boiling point, the compounds would be:
1. CH3CH2N(CH3)2 - This compound has two methyl (CH3) groups attached to the nitrogen atom, making it the largest of the three compounds. Therefore, it has the strongest intermolecular forces and the highest boiling point.
2. CH3CH2CH2NHCH3 - This compound has only one methyl group attached to the nitrogen atom, making it smaller than the previous compound. Therefore, it has weaker intermolecular forces and a lower boiling point.
3. CH3CH2CH2CH2NH2 - This compound has no alkyl groups attached to the nitrogen atom, making it the smallest of the three compounds. Therefore, it has the weakest intermolecular forces and the lowest boiling point.
In summary, the order of boiling points for these compounds is: CH3CH2N(CH3)2 > CH3CH2CH2NHCH3 > CH3CH2CH2CH2NH2.
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The decreasing order of boiling points for the given compounds is: CH₃CH₂CH₂CH₂NH₂ > CH₃CH₂CH₂NHCH₃ > CH₃CH₂N(CH₃)₂.
Boiling points are influenced by factors such as molecular weight, hydrogen bonding, and van der Waals forces. CH₃CH₂CH₂CH₂NH₂ has the highest boiling point due to its longer carbon chain, which results in stronger van der Waals forces, and its ability to form hydrogen bonds.
CH₃CH₂CH₂NHCH₃ has a slightly lower boiling point because it has a smaller molecular weight but can still form hydrogen bonds. Finally, CH₃CH₂N(CH₃)₂ has the lowest boiling point because it cannot form hydrogen bonds and has weaker van der Waals forces compared to the other two compounds.
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what do you get if oceanic plates are moving away from one another
Answers
Answer:
Explanation:
When two plates are moving away from each other, they are called a divergent plate boundary.Along these boundaries, magma rises from deep within the Earth and erupts to form new crust on the lithosphere.
Helped by none other than the #Queen herself!
Warm Up: Compete this conversion. Put just the number below *
Conversion Factor
4 Cookies = 3 M&Ms
If you traded (converted) 6
Cookies for M&Ms, how
many M&Ms do you have?
Answers
Answer:
4 1/2
Explanation:
Use a ratio to find your answer
4 6
----- = -------
3 x
Cross multiply to solve for x.
4x = 18
x = 18/4
x = 4 2/4 which is the same as 4 1/2
John is hiking and notices a small stream of water flowing down the side of the mountain. What part of the water cycle is John observing?
Answers
Explanation: because it said that it is going down the side of the mountain
a piston-cylinder device contains a liquid-vapor mixture of water at 300 k. during a constant-pressure process, 750 kj of heat is transferred to the water. as a result, part of the liquid in the cylinder vaporizes. determine the entropy change of the water in kj/k during this process.correct!2.5
Answers
The entropy change of the water during the constant-pressure process is 2.5 kJ/K.
Entropy change can be calculated using the formula ΔS = Q/T, where Q is the amount of heat transferred and T is the temperature of the system. In this case, the temperature of the water remains constant at 300 K during the constant-pressure process, so the entropy change can be calculated as ΔS = 750 kJ / 300 K = 2.5 kJ/K.
The fact that part of the liquid in the cylinder vaporizes does not affect the calculation of the entropy change, as the formula only considers the heat transferred and the temperature of the system. The positive value of the entropy change indicates an increase in disorder or randomness of the water molecules in the system, which is expected during a heating process.
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A FeCl 3 solution is 0.175 M. How many mL of a 0.175 M FeCl 3 solution are needed to make 650. mL of a solution that is 0.300 M in Cl - ion?
Answers
Based on the molar concentration, the volume of FeCl₃ required is 371 mL
What is the mole ratio of the reaction?The mole ratio of the reaction is determined from the equation of the reaction as follows:
Equation of reaction: FeCl₃ (aq) ----> Fe³⁺ (aq) + 3 Cl⁻ (aq)
From the equation of reaction, the mole ratio of FeCl₃ to Cl⁻ is 1 : 3
The moles of chloride ions in 650 mL of 0.300 M is calculated from the formula below:
Moles = molar concentration * volume in litersMoles of Cl⁻ ions = 0.300 * 650/100
Moles of Cl⁻ ions = 0.195
Moles of FeCl₃ required = 0.195/3
Moles of FeCl₃required = 0.065
volume of FeCl₃ required = 0.065 / 0.175
volume of FeCl₃ required = 0.371 L or 371 mL
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when trained teams and consumers are consulted for feedback before, during, and after a food product is developed this is referred to as
Answers
Answer:
I believe the answer is a review
Explanation:
When you give them feedback it would be a review for other people to see.
Have a great day.
What kind of exercise does not require the use of oxygen to metabolize energy? strength aerobic stretching anaerobic
Answers
Answer:
See Below
Explanation:
'an aerobic ' means it does not use oxygen
Answer:
anaerobic
Explanation: