Chemical bonds are likely to form when
a. two atoms have the same number of electrons.
b. an atom s outer energy level doesn t have the maximum number of electrons.
c. an atom s nucleus has the same number of protons as neutrons.
d. an atom s outer energy level is filled.

The molecular weight of Mn2Se7 = 662.1grams /mol

The molecular weight of molecule is calculated using the periodic table to find out the atomic weight of each atom times the number of atoms present.

Therefore, atomic weight of Mn= 54.9 × 2 = 109.8g

Se = 78.9 × 7 = 552.3g

109.8g + 552.3g = 662.1g/ mol

Therefore the molecular weight = 662.1grams /mol

Learn more about molecular weight here:

https://brainly.com/question/24727597

The maximum amount of cesium xenon heptafluoride (CsXeF7) that can be produced from the reaction of 11.0 mol cesium fluoride with 11.5 mol xenon hexafluoride is 11.0 moles, as cesium fluoride is the limiting reagent.

To determine how many moles of cesium xenon heptafluoride (CsXeF7) can be produced from the reaction of 11.0 mol cesium fluoride with 11.5 mol xenon hexafluoride, we must first write a balanced chemical equation for the reaction:

CsF + XeF6 → CsXeF7

From this equation, we can see that the reaction is a 1:1 molar ratio between cesium fluoride (CsF) and xenon hexafluoride (XeF6).

Given that 11.0 moles of cesium fluoride and 11.5 moles of xenon hexafluoride are available, cesium fluoride is the limiting reagent since we have less of it. Thus, it will determine the maximum amount of CsXeF7 that can be formed.

Therefore, theoretically, 11.0 moles of CsXeF7 can be produced from the available reactants.

Final answer:

The maximum number of moles of CsXeF₇ that can be produced is 11.0 moles, as cesium fluoride (CsF) is the limiting reagent in the reaction.

Explanation:

The student is asking how many moles of cesium xenon heptafluoride (CsXeF₇) can be produced from the reaction of 11.0 mol cesium fluoride (CsF) with 11.5 mol xenon hexafluoride (XeF₆). The reaction is written as:

CsF(s) + XeF₆(s) → CsXeF₇(s)

To answer this question, we need to determine which reactant is the limiting reagent, because that reactant will dictate the maximum amount of product that can be formed. In this reaction, each mole of CsF reacts with one mole of XeF₆ to form one mole of CsXeF₇. Since we have 11.0 moles of CsF and 11.5 moles of XeF₆, CsF is the limiting reagent.

Therefore, the maximum amount of CsXeF₇ that can be formed is equal to the amount of limiting reagent, which is 11.0 moles.

Answer:

yea

Explanation:

Answer:

Energy cannot be created or destroyed.

Explanation:

Answer:

the number of protons.

Explanation:

The number of protons is also the atomic number that the element has in the periodic table, no element has the same number of protons than any other, and if an atom changes the number of protons in its nucleus it changes the element it is. This gives the atom its characteristics, and its position in the periodic table, this also dictates the type of element that that atom is.

Final answer:

Structures can be classified as hemiacetals when a carbonyl and an alcohol react within the same molecule, usually forming a more stable ring structure in sugars. Acetals form when a hemiacetal reacts with an excess of alcohol, leading to two alkoxy groups on the same carbon. This knowledge is used to classify sugars, especially considering anomers that differ at the anomeric carbon.

Explanation:

The structures provided by students are to be classified as either hemiacetals, acetals, or other. To classify these structures, one must understand the chemical reactions involved in forming these compounds.

A hemiacetal forms when an alcohol (R-OH) reacts with a carbonyl (C=O) group within the same molecule, typically resulting in a stable five- or six-membered ring structure in sugars.

Conversely, an acetal is formed when an excess of alcohol reacts with a hemiacetal, replacing the hemiacetal's hydroxyl (-OH) group with an alkoxy (-OR) group, leading to a compound with two -O-R groups attached to the same carbon atom.

In monosaccharides, these reactions are common and result in cyclic structures.

An important aspect to remember while classifying sugars is the concept of anomers, which are sugars that differ at the anomeric carbon.

The anomeric carbon is the carbon atom that was originally part of the carbonyl group before the intramolecular reaction to form the cyclic hemiacetal.

The interconversion between open-chain and cyclic forms of compounds containing both aldehyde and alcohol groups is a key process in the chemistry of sugars, known as mutarotation.

Final answer:

Hemiacetal structures contain an anomeric carbon bonded to both an -OH and an -OR group, typically in a five- or six-membered ring, while acetals have two -OR groups attached to the same carbon. Acetal formation often occurs with excess alcohol. This process is significant in carbohydrate chemistry and the study of monosaccharides.

Explanation:

Classifying Hemiacetal and Acetal Structures

When classifying structures as hemiacetal, acetal, or other, it is important to understand the molecular configuration of these compounds. A cyclic hemiacetal is formed when an alcohol (R-OH) reacts with a carbonyl (C=O) group within the same molecule, resulting in a structure where the anomeric carbon (the carbonyl carbon) is bonded to both an -OH group and an -OR group. This structure is particularly stable when it forms five- or six-membered rings, which is often the case with monosaccharides like glucose.

In the presence of excess alcohol, the hemiacetal can further react to form an acetal, which is characterized by two -OR groups attached to the same carbon. In simple terms, a hemiacetal will have both an -OH group and an -OR group bonded to the same carbon atom whereas an acetal will have two -OR groups bonded to the same carbon atom.

The process of carbohydrates forming cyclic structures is a key concept in sugar chemistry, particularly with regard to anomers, which are sugars that differ at the anomeric carbon. The ability to draw and interconvert between open-chain and cyclic forms of compounds containing both carbonyl and alcohol groups in the same molecule is a fundamental skill in understanding carbohydrate chemistry.

Answer:

The answer is: TRUE

Explanation:

Hello!

Let's solve this!

This is true, since the Lithium atom has a valence number of +1, this means an electron to yield.

For its part, the iodine has valence number -1, this means a place to accept electrons.

When joined they make a perfect combination where it has high electronic stability.

We conclude that the answer is: TRUE

The process of balancing a redox reaction in acidic conditions involves identifying oxidation states, separating into half-reactions, balancing for mass and charge, and combining. The provided question contains errors, making it impossible to balance as stated.

The question you've asked involves balancing a redox reaction in acidic conditions, which is a foundational concept in chemistry. Unfortunately, the equation provided (Cr2+ + H2MoO4 --> Cr3+ Mo) is not completely accurate or clear in terms of the reactants and products involved. Typically, in a redox reaction balancing task, you would identify the oxidation states of the elements involved, separate the reaction into oxidation and reduction half-reactions, balance each for mass and charge, and then combine them back into a full balanced equation. However, it looks like there was some confusion or typo in the equation provided, as H2MoO4 and Mo don't directly relate to the chromium oxidation states changing from Cr2+ to Cr3+.

In general, to balance redox reactions in acidic conditions, you first write the separate half-reactions for oxidation and reduction, balance the atoms in each half-reaction (first the non-oxygen and non-hydrogen atoms, then oxygen by adding H2O, and hydrogen by adding H+ ions), balance the charges by adding electrons, and then combine the half-reactions ensuring that the electrons are balanced. Finally, you would simplify the equation if possible. Without the correct equation, giving a specific balanced reaction is not feasible.

Answer: The electronic configuration of Chlorine will be [tex][Ne]3s^23p^5[/tex]

Explanation: Chlorine is an element which belongs to the P-block of the periodic table. Its atomic number is 17.

Atomic Number = Number of electrons

Number of electrons = 17

The nearest noble gas which lies to Chlorine is Neon which has 10 electrons. Rest of the 7 electrons are filled in the 3s and 3p orbitals. Hence, the electronic configuration of Chlorine is

[tex][Cl]=[Ne]3s^23p^5[/tex]

Answer:

B. [tex][Ne] 3s^23p^5[/tex]

Explanation:

Chlorine is the element of group 17 and third period. The atomic number of chlorine is 17 and the symbol of the element is Cl.

The electronic configuration of the element chlorine is:-

[tex]1s^22s^22p^63s^23p^5[/tex]

Noble gas notation includes a shorthand way of writing the electronic configuration of the elements.

The nearest noble gas - Neon which has electronic configuration of - [tex]1s^22s^22p^6[/tex]

So, the noble gas notation for chlorine is:- [tex][Ne] 3s^23p^5[/tex]

Answer:

6.002= 4 sig figs

Explanation:

your welcome :)

The boiling point of a liquid changes with atmospheric pressure because it is the temperature at which the liquid's vapor pressure equals the surrounding pressure.

The boiling point of a liquid varies with atmospheric pressure due to the relationship between vapor pressure and temperature. Vapor pressure is the pressure exerted by the vapor of the liquid in equilibrium with its liquid phase.

As temperature increases, so does vapor pressure, until it equals the surrounding environmental pressure, which is the boiling point. The normal boiling point of a liquid is defined as the temperature at which the vapor pressure equals 1 atm (101.3 [tex]kP_a[/tex]).

Since atmospheric pressure changes with altitude, the boiling point of a liquid also changes. For example, water boils at a lower temperature at higher altitudes due to reduced atmospheric pressure.

Answer:

c. eventually stop. Have A Great DAY!     :)

Explanation:

the answer should be a) solution , a solution is the term used for when two substances that is combined but does not chemically make a third substance .

The binary ionic compounds that can be formed from the ions Zn2+, Fe2+, F-, and S2- are ZnF2, ZnS, FeF2, and FeS.

An empirical formula represents the simplest whole-number ratio of atoms in a compound. For binary ionic compounds, the total number of positive charges must equal the total number of negative charges to ensure the compound is neutral. For the ions provided: Zn2+, Fe2+, F-, S2-, we can form the following four binary ionic compounds:

https://brainly.com/question/1669915

#SPJ12

Explanation:

The highest occupied energy sub-level is defined as number of electrons present in the outermost energy level of an atom.

For example, for alkali metals general electronic configuration is [tex]ns^{1}[/tex].

This means that in the highest occupied energy sub-level of an alkali metal there will be only one electron.

Whereas for alkaline earth metals general electronic configuration is [tex]ns^{2}[/tex]. This means there are 2 electrons present in the highest occupied energy sub-level of an alkaline earth metal.

Thus, we can conclude that atom that contains only one electron in the highest occupied energy sublevel are alkali metals.

A molecule with a covalent bond can either be polar or nonpolar, depending on the difference in electronegativity between the bonded atoms and the molecule's geometry. Option C is correct.

The correct statement regarding covalent bonds is that a molecule having a covalent bond may be polar or nonpolar. Covalent bonds occur when atoms share electrons. Depending on the electronegativity values of the atoms involved and the molecular geometry, covalent bonds can be classified as nonpolar or polar.

A nonpolar covalent bond forms between atoms that share electrons equally, such as two atoms of the same element. In contrast, a polar covalent bond forms when one atom has a stronger attraction to the shared electrons than the other atom, leading to a slight charge separation within the molecule.

Moreover, a molecule can have polar covalent bonds, yet be nonpolar overall if the molecule is symmetrical and the polar bonds cancel each other out. Conversely, a molecule can be polar if there is an uneven distribution of charge due to asymmetrical polar bonds. Therefore, the presence of a covalent bond does not solely determine the molecule's polarity, and statement C is true.

Answer:

c

Explanation:

The standard enthalpy change of the reaction ClO(g) + O₃(g) -> ClO₂(g) + O₂(g) is -243.3 kJ/mol. This is calculated by subtracting the sum of the standard enthalpies of formation of reactants from products.

To calculate the standard enthalpy change [tex](\( \Delta H^\circ \))[/tex] of the reaction, we need to use the standard enthalpies of formation [tex](\( \Delta H_f^\circ \))[/tex] for each substance involved in the reaction.

Given:

- [tex]\( \Delta H_f^\circ \) for ClO(g) = 101 kJ/mol[/tex]

- [tex]\( \Delta H_f^\circ \) for O3(g) = 142.3 kJ/mol[/tex]

- [tex]\( \Delta H_f^\circ \) for O2(g) = 0 kJ/mol[/tex]

- [tex]\( \Delta H_f^\circ \) for O(g) = 247.5 kJ/mol[/tex]

The reaction can be rewritten as:

[tex]\[ \text{ClO}(g) + \text{O}_3(g) \rightarrow \text{ClO}_2(g) + \text{O}_2(g) \][/tex]

Now, we calculate the overall change in enthalpy:

[tex]\[ \Delta H^\circ = \sum \Delta H_f^\circ (\text{products}) - \sum \Delta H_f^\circ (\text{reactants}) \][/tex]

[tex]\[ \Delta H^\circ = (\Delta H_f^\circ (\text{ClO}_2) + \Delta H_f^\circ (\text{O}_2)) - (\Delta H_f^\circ (\text{ClO}) + \Delta H_f^\circ (\text{O}_3)) \][/tex]

Substituting the values:

[tex]\[ \Delta H^\circ = ((0 + 0) - (101 + 142.3)) \, \text{kJ/mol} \][/tex]

[tex]\[ \Delta H^\circ = (-243.3) \, \text{kJ/mol} \][/tex]

Therefore, the standard enthalpy change of the reaction is -243.3 kJ/mol.

Final answer:

The white solid observed by Jayne's science teacher is most likely a new substance with different properties, resulting from a chemical reaction between the clear and blue liquids, indicative of a precipitation reaction.

Explanation:

When Jayne's science teacher mixed a clear liquid with a blue liquid and observed a white solid at the bottom of the beaker, it is most likely that the white solid is a new substance with different properties. This is a result of a chemical reaction where the original substances reacted to form a new compound, indicating a chemical change. The formation of a solid from two liquids in a process is often referred to as a precipitation reaction.

Addressing the possibilities mentioned in the question, it was unlikely that the solid was secretly added by the teacher as this would not be a scientifically valuable demonstration. While we cannot definitively know if it will dissolve in water to form a blue solution without further testing, it's less relevant to the key observation of a solid forming from two liquids - a sign of a chemical reaction. Additionally, without more information, we cannot confirm whether the solid is an organic compound, although this could be hypothesized if we knew more about the chemical nature of the liquid mixtures.

By using Hess's Law, we could manipulate the given equations and their respective enthalpies in order to derive for the equation NO + O -> NO2. We found out that the completed equation has an enthalpy change of -114 kJ.

The calculation of the enthalpy of the reaction NO + O -> NO2 using Hess's Law involves systematically manipulating and summing up the given equations and their respective enthalpy changes to arrive at the desired equation.

To begin, let's reverse the third equation, which effectively changes the sign of its enthalpy:

NO2 + O2 -> NO + O3 (∆H = +199 kJ)

Next, we add the first and the newly obtained third equations which cancel out the common terms on opposite sides of the equations, giving:

2NO2 + 2O2 -> 2NO + 2O3 + 2O3 -> 3O2

Which simplifies to 2NO2 -> 2NO + O2. The enthalpy (∆H) for this reaction will be the sum of the enthalpy of the first equation and the reversed third equation, which equals -427 kJ + 199 kJ = -228 kJ.

Now, we halve this equation to obtain the equation we want, NO + O -> NO2, yielding ∆H = -114 kJ.

https://brainly.com/question/14561923

#SPJ12

The enthalpy for the reaction NO + O -> NO2 using Hess' law can be calculated by adjusting and adding the enthalpies of the given reactions. The total enthalpy for the reaction is +873.5 kJ.

To calculate the enthalpy of the reaction NO + O -> NO2 using Hess's Law, we have to add the enthalpies of the individual reactions, taking into consideration the balance of the reactions.

https://brainly.com/question/29254242

#SPJ2

Final answer:

When 0.32 mol of NH4Cl is dissolved in water, it dissociates into NH4+ and Cl- ions. Since each mole of NH4Cl produces one mole of each ion, the total moles of ions produced will be 0.64 mol.

Explanation:

To determine how many total moles of ions are released when 0.32 mol of NH4Cl dissolves in water, we need to know the dissociation of NH4Cl in water. NH4Cl dissociates into NH4+ and Cl- ions when it dissolves in water.

Step 1: Write out the dissociation equation for NH4Cl:
NH4Cl (s) → NH4+ (aq) + Cl- (aq)

Step 2: Since 1 mole of NH4Cl produces 1 mole of NH4+ ions and 1 mole of Cl- ions, the total moles of ions produced from 0.32 mol of NH4Cl will be:

0.32 mol NH4Cl × 2 mol ions/mol NH4Cl = 0.64 mol ions.

Therefore, 0.32 mol of NH4Cl will produce 0.64 mol of ions in total.

The preference for Cola or Pepsi is subjective, influenced by personal taste but can be skewed by research methods like in the Pepsi Challenge. Situations like the Soft Drink Commissioner election show how a divided majority could lead to unexpected results. A merger between Coke and Pepsi could be viewed as anti-competitive.

The preference between Cola and Pepsi comes down to personal taste and is subjective. However, in a scenario like the Pepsi Challenge, the preference shown for Pepsi could have been influenced by a confounding variable, such as the knowledge of what each letter represents to the subjects. To redesign the research and eliminate the confound, one would need to ensure that the participants are entirely unaware of which beverage is in each glass, otherwise known as a double-blind test. Additionally, situations like the Soft Drink Commissioner election illustrate how multiple candidates from one party can split the voting population, leading to a win for the single opposing candidate due to a divided majority.

In terms of deciding which is better, Coke or Pepsi, that is not an objective question and varies based on individual preference. However, in a legal context involving a potential merger of the two companies, a judge might consider the effect on competition in the marketplace. If a merger between Coke and Pepsi was proposed, one might argue against it on the grounds of it being anti-competitive, despite any suggested efficiencies.

Answer: Option (B) is the correct answer.

Explanation:

Entropy is defined as the degree of disorder or randomness. This means that when particles of a matter move rapidly and continuously from one place to another then this shows entropy of the matter is high.

For example, particles of a gas are weakly held and hence, they rapidly collide and show high entropy.

Whereas in solids, particles are held together by strong intermolecular forces of attraction. Thus, they are not moving and hence in solids entropy is the lowest.

Thus, we can conclude that out of the given options, [tex]H_{2}O(s)[/tex] has the lowest entropy.

The correct answer is H2O(s) - Ice. Entropy is a measure of disorder in a system. The lowest entropy is found in solids because their particles are closely packed and have a fixed arrangement.

The correct answer is B: H2O(s) - Ice

Entropy is a measure of the disorder or randomness of a system. The state of matter with the lowest entropy is a solid because the particles are closely packed and have a fixed arrangement.

For example, in the case of water, H2O(s) or ice has the lowest entropy because the water molecules are arranged in a regular lattice structure. In comparison, H2O(g) or water vapor has a higher entropy because the water molecules are spread apart and have greater freedom of movement.

Hence, among the given options, H2O(s) has the lowest entropy.

Learn more about Entropy here:

https://brainly.com/question/33413760

#SPJ6

I think the answer is 6.52 g/L

Answer:

64

Explanation:

Mole of a compound = mass of a compound / molar mass of a compound

Mass of a compound = mole of a compound x molar mass of a compound

Given,

Mole of methanol = 2 mol

Molar mass of methanol = 32 g/mol

Mass of methanol = Mole of methanol x Molar mass of methanol  

                               = 2 mol x 32 g/mol = 64 g

Therefore, the mass, in grams, of the sample = 64

Final answer:

To determine the mass of a 2.0 mol sample of methanol, one should multiply the number of moles by the molar mass, yielding a mass of 64 grams.

Explanation:

The chemist has 2.0 mol of methanol (CH₃OH) with a molar mass of 32.0 g/mol. To find the mass in grams of the methanol sample, we multiply the number of moles by the molar mass of methanol.

Mass = Number of moles × Molar mass = 2.0 mol × 32.0 g/mol = 64 g.

Therefore, the mass of the sample is 64 grams.