Which of the following formulas represents an ionic compound?
1.HI 2.HCI 3.LiCI 4.SO2

Answer:

The correct answer is the second last statement, that is, it affects the energy levels of the metal d orbitals.

Explanation:

It is because of the d-d transition of electrons that the metal complexes exhibit color. When bonding of the ligands takes place with the transition metal ion, a repulsion results between the electrons in the d orbitals of the metal ion and the electrons found within the ligands. This increases the d orbitals' energy level.  

However, based on the alignment of the d orbitals in the space, all of the energies do not get elevated by the same level, it gets dissociate into two groups. This dissociation of the d-orbitals relies upon the ligand's strength. More amount of energy would be required to encourage an electron from the lower orbitals groups to the move towards the higher ones in case if the splitting is more.  

Greater energy is equivalent to shorter wavelengths in terms of the color of the light absorbed. The complex ions possessing different ligands show distinct kinds of colors as the energy levels of the d orbitals of the metal get affected by the ligands.  

The specific heat capacity of the metal can be calculated using the calorimeter equation. The specific heat capacity of the metal is obtained as 0.406 J/(°C g).

The specific heat capacity of a substance is the heat energy required to raise its temperature by one degree celsius per one gram of that substance.

The calorimeter equation relating heat energy q, mass m and temperature difference ΔT and specific heat capacity c is written as:

q = mcΔT.

In the given system the heat energy is transferred from the metal to water thus the final temperature of both will be 25 °C. Thus, at thermal equilibrium we can write it as:

25 g × c (95 -25 °C) = 25 × 4.18  × (25 - 18.2 °C )

Where, mass of water can be taken as 25 g since its density is 1 g/ml. From this specific heat capacity of the metal c is calculated as follows:

c =  [ 25 × 4.18  × (25 - 18.2 °C ) ] / 25 g ×  (95 -25 °C)

  = 0.406 J/(°C g).

Therefore, the specific heat capacity of the metal is  0.406 J/(°C g).

To find more on calorimeter, refer here:

https://brainly.com/question/4802333

#SPJ1

The ΔHrxn for the neutralization reaction between aqueous NaOH and HCl is -994.6 kJ/mol HCl.

Given that A 100.0 mL sample of 0.255 M NaOH is mixed with a 100.0 mL sample of 0.200 M HCl in a coffee cup calorimeter.  Both solutions were initially at 20.00°C and the temperature of the resulting solution was recorded as 37.00°C.  

We are to determine the ΔHrxn (in units of kJ/mol HCl) for the neutralization reaction between aqueous NaOH and HCl.  The balanced chemical equation for the neutralization reaction between aqueous NaOH and HCl is

 NaOH (aq) + HCl (aq) → NaCl (aq) + H2O  

(l)First, we need to determine the limiting reactant. It is necessary to identify the limiting reactant in order to calculate the moles of HCl reacted in the reaction and use it to determine ΔHrxn.  

Limiting reagent is the reactant that will be completely used up first, stopping the reaction. The reactant that is not completely consumed is the excess reactant.

We can use the concept of Stoichiometry to identify the limiting reactant.  To determine the limiting reactant, we can use the following formula:  

Molarity (M) = moles of solute (mol) / liters of solution (L) For NaOH, molarity (M) = 0.255 M For HCl, molarity (M) = 0.200 M.

Let's calculate the moles of NaOH and HCl:

Moles of NaOH = Molarity (M) × Volume (L)Moles of NaOH = 0.255 M × 0.100 L = 0.0255 mol

Moles of HCl = Molarity (M) × Volume (L)

Moles of HCl = 0.200 M × 0.100 L = 0.0200 mol

As we can see, the number of moles of NaOH is more than the number of moles of HCl.   NaOH is present in excess, while HCl is limiting.

The amount of HCl determines how much NaOH reacts, so we will use the number of moles of HCl to determine ΔHrxn.Next, we can calculate the amount of heat absorbed by the reaction:

qrxn = – qcal where qrxn = heat absorbed by the reactionqcal

= heat released by the calorimeterqcal

= (mass of water + mass of calorimeter) × specific heat of water × ΔTqcal = (200.0 g + 50.0 g) × 4.184 J/g·°C × (37.00°C – 20.00°C)

= 19,892 J or 19.892 kJqrxn

= – 19.892 kJ  (because no heat is lost to the calorimeter or the surroundings)

Next, we can use the equation below to calculate ΔHrxn:ΔHrxn = qrxn / n ΔHrxn = -19.892 kJ / (0.0200 mol × (-1)) = 994.6 kJ/mol HCl (Negative sign indicates that the reaction is exothermic).

for such more questions on  reaction

https://brainly.com/question/25769000

#SPJ8

Answer:

c. 2s2 2p5

Explanation:

2s2 2p5 has 7 valence electrons and only needs one electron to complete the octet.  This element will be the most electronegative.

Answer:

Protein Power

Much of a cell's efforts go toward making proteins. Proteins carry out many important functions in the body. ... Cell organelles must work together to carry out protein synthesis, utilize proteins within the cell, and transport them out of the cell.

Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.

On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.

In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.

Know more about Coulomb's law here:

https://brainly.com/question/26892767

#SPJ8

The energy value of olive oil is 42.37 kJ/g. The enthalpy from the olive oil is 52.198 kJ/mol.

The question isn't complete. A similar question is in the attachment. A calorimeter is a tool that use to measure heat energy according to the equation

Q = m × c × ΔT

The heat energy that release

Q = m × c × ΔT

Q = 390 × 4.184 × 14.8

Q = 24,150.048 J

Q = (24,150.048 ÷ 1,000) kJ

Q = 24.15 kJ

The energy value is the ratio between the heat energy and the mass. For this problem

The formula to calculate the enthalpy ΔH = Q ÷ n

Learn more about heat energy here: brainly.com/question/28842664

#SPJ1

Answer:

The charges are typically used to determine the mole ratio and composition of the individual atoms of elements in the compound

Explanation:

Take for instance the following compounds:

\(NaOH\) and \(H_{2} O\)

I hope this helps.

The number of neutrons correctly represented is B. As has 42 neutrons.

Neutrons,  as well as  protons,  ca be described as the subatomic particles that are present  inside the nucleus of every atom and only in  hydrogen,  is where the nucleus contains only a single proton.

However the Neutrons have a neutral electric charge as well as  and  slightly more mass than positively charged protons.

It should be noted that  Arsenic (As),  has Atomic Number 33, Mass 74.922.

Mass number -Atomic number =Number of neutrons

And the Number of neutrons =74.922  - 33 = 41.9 =42

Therefore, option B is correct.

Learn more about neutrons at:

https://brainly.com/question/3986823

#SPJ1

Answer:

True

Explanation:

Technology has been mans best friend for a while due to the fact that they can make things to help others and create more jobs and help everyone overall.

Answer:

A. Sturdy

Explanation:

Unlike every other answer, the cell wall is the part of the cell that acts as a strong barrier of the cell. In this case, it is sturdy.

Answer: 32 mg

Explanation:

32 / 8 = 4 = how much half-life has passed. 512 / 2^4 = 32.

Answer:

The vapor pressure of carbon tetrachloride, CCl4, is 0.354 atm,

and the vapor pressure of chloroform, CHCl3, is 0.526 atm at

316 K. A solution is prepared from equal masses of these two

compounds at this temperature. Calculate the mole fraction of

the chloroform in the vapor above the solution. If the vapor

above the original solution is condensed and isolated into a

separate flask, what would the vapor pressure of chloroform be

above this new solution?

ANSWER

0.346 atmatm

Chapter 13

Solutions



Chemistry Structure and Properties

Topics

Discussion

You must be signed in to discuss.

Video Transcript

problem. 1 13 asks what the, um the mole fraction of chloroform is if equal masses of carbon tetrachloride and core former mixed together. And then it asks you to condense the vapor above such a solution and figure out what the pressure of core form is above that new solution. So the problem gives you that the vapor pressure of pure carbon tetrachloride is 0.354 atmospheres, and the vapor pressure of pure chloroform is 0.5 to 6 atmospheres. Both of these at 316 

Answer:

D . They are found in moist environments.

Explanation:

Nonvascular plants do not have a xylem or phloem, roots, stems, or leaves. Because these plants lack water-conducting tissues, they fail to achieve the structural complexity and size of most vascular plants and have evolved in habitats which allow their survival and reproduction.

The plant body that is most obvious in non-vascular plants are the the gametophyte generation. The gametophte gemeration is haploid.

The non-vascular plants grow in moist environments. It is due to lack of vascular tissue that requires to maintain close contact with water to prevent desiccation. Nonvascular plants are plants that do not have any special internal pipelines or channels to carry water and nutrients. Instead, nonvascular plants absorb water and minerals directly through their leaflike scales. Nonvascular plants are usually found growing close to the ground in damp, moist places. Non-vascular plants thrive in damp conditions since they don't need to rely on roots to acquire enough water.

Answer:

Solvent - water

solute - lemonade powder

Explanation:

You should learn the definitions of al them words. I made them notes in grade 7 dont judge and was bored while studying so i highlited everything and i thought it looked cute back then. We all did that.

Answer:

38 g

Explanation:

I think thats the answer in your question

Answer:

302ml

Explanation:

using PV=NRT for the first given piece of information, we need to find N, 1.52x275=Nx8.31x100

will give an N value of 0.5

now we substitute this into the second given piece of information to find V:

2.75xV=0.5x8.31x200

will give a V value of 302ml

since they used the SI units, the pressure given in atm must be converted into pa by multiplying it with 101.3x10^3

1.52atm will be 153976pa

2.75atm will be 278575pa

also the temperature was given in °C but the SI unit is in K

so to convert, we just add 273

100°C will be 373K

and 200°C will be 473K

use the same technique to find N first, substitute it into the second piece of information to get V

The concentration of ClO₃⁻ in the resulting solution is 0.447 M

We'll begin by obtaining the mole of AgClO₃ in the solution. This is illustrated as follow:

Molarity = mole / volume

Cross multiply

Mole = molarity × volume

Mole of AgClO₃ = 0.349 × 0.821

Mole of AgClO₃ = 0.287 mole

Finally, we shall determine the mole of ClO₃⁻ in AgClO₃ solution as folllow:

AgClO₃(aq) <=> Ag⁺(aq) + ClO₃⁻(aq)

From the balanced equation above,

1 mole of AgClO₃ contains 1 mole of ClO₃⁻

Therefore,

0.287 mole of AgClO₃ will also contain 0.287 mole of ClO₃⁻

We'll begin by obtaining the mole of Mn(ClO₃)₂ in the solution. This is illustrated as follow:

Molarity = mole / volume

Cross multiply

Mole = molarity × volume

Mole of Mn(ClO₃)₂ = 0.267 × 0.913

Mole of Mn(ClO₃)₂ = 0.244 mole

Finally, we shall determine the mole of ClO₃⁻ in Mn(ClO₃)₂ solution as folllow:

Mn(ClO₃)₂(aq) <=> Mn²⁺(aq) + 2ClO₃⁻(aq)

From the balanced equation above,

1 mole of Mn(ClO₃)₂ contains 2 mole of ClO₃⁻

Therefore,

0.244 mole of Mn(ClO₃)₂ will contain = 0.244 × 2 = 0.488 mole of ClO₃⁻

Molarity = mole / volume

Molarity of ClO₃⁻ = 0.775 / 1.734

Molarity of ClO₃⁻ = 0.447 M

Learn more about molarity:

https://brainly.com/question/13386686

#SPJ1

The sentences that probably comes from a work of classic literature are:

The great literary works of Greek, Roman, and other prehistoric civilizations are referred to as classical literature. Classical literature includes the writings of Homer, Ovid, and Sophocles. The phrase isn't just applicable to books. It can also incorporate other types of writing, such as epic, lyric, tragedy, comedy, and pastoral.

Classical literature enables us to take a profound plunge into the lives, worldviews, and mindsets of individuals we have never met, to travel to unfamiliar settings, and to comprehend eras we will never be able to experience ourselves.

Therefore, option C and D are correct.

Learn more about literature at:

https://brainly.com/question/20848481

#SPJ1

Answer:

here is the diagram

Explanation:

(a) Because acid is caustic, dolphins can perish from exposure to it. Acids are compounds that give other things protons (H+). Acid can react with the proteins and lipids in dolphins' skin when they come into touch with it, leading to chemical burns and damage to the underlying tissue. Systemic consequences from this include death.

(b) Because chlorine is a potent oxidizer, it interacts with red-hot iron powder to produce Iron(III) chloride (FeCl3) rather than Iron(II) chloride (FeCl2). FeCl3 is created when chlorine at high temperatures rapidly accepts electrons from iron atoms. Contrarily, iron interacts with HCl, a less potent oxidizer than chlorine, to produce FeCl2.

Learn more about chlorine at :

https://brainly.com/question/31560014

#SPJ1

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

Answer:

\(m_{NaCl}=19.9gNaCl\)

Explanation:

Hello!

In this case, since the formula for the calculation of molarity is:

\(M=\frac{n}{V}\)

Whereas we can compute the moles of the solute as shown below, making sure the volume is in liters:

\(n=M*V\)

Thus, by plugging in we obtain:

\(n=0.200L*1.70mol/L=0.170molNaCl\)

Next, since the molar mass of NaCl is 58.44 g/mol, we obtain the following mass:

\(m_{NaCl}=0.170molNaCl*\frac{58.44gNaCl}{1molNaCl}\\\\m_{NaCl}=19.9gNaCl\)

Best regards!

-1113.5kJ is the theoretical enthalpy of combustion.

What makes energy different from enthalpy?

The entire amount of heat energy that is either absorbed or released in a thermodynamic system is measured by enthalpy. Internal energy denotes all of the potential or moving energy present in a thermodynamic system.

Enthalpy of combustion is the term used to describe the change in a system's enthalpy that occurs when one mole of a substance fully burns in oxygen or air at a specific temperature.

C₂H5OH()+302(g) → 2CO2(g) + 3H₂O(1)

Reactants:

5 C-H : 5*412

1 C-C : 348

1 C-O: 358

3 O=O: 3* 496

1 O-H: 463

Products:

2*2 C=O : 4*743

2*3 O-H: 6*463

Enthalpy of Vaporization (kJ mol-¹) for :

Ethanol 42.5

Water 41​

Enthalpy of combustion : (5*412 + 348 + 358 + 3* 496 + 463 + 42.5) - ( 3*41 + 4*743 + 6*463)    

                                        : -1113.5kJ

To learn more about enthalpy use :

https://brainly.com/question/5374936

#SPJ1

Answer:

fluid displacement

Explanation:

hope it helps

Answer:

I guess D ...,...,.....

On the basis of oxidation number considerations, the oxide that would not react with molecular oxygen is SO3. This is because sulfur already has the maximum oxidation number of +6 in this compound.

Oxidation number is a measure of the number of electrons that an atom has lost or gained in a compound. In the case of NO, nitrogen has an oxidation number of +2, so it can still react with oxygen to form NO2, where nitrogen has an oxidation number of +4. Similarly, in N2O, nitrogen has an oxidation number of +1, so it can also react with oxygen to form a compound with a higher oxidation number, such as N2O3 or N2O5. In P4O6, phosphorus has an oxidation number of +3, so it can also react with oxygen to form P4O10, where phosphorus has an oxidation number of +5.

However, in SO3, sulfur already has the maximum oxidation number of +6, so it cannot react with oxygen to form a compound with a higher oxidation number. Therefore, SO3 is the oxide that would not react with molecular oxygen.

To know more about oxidation number visit:

https://brainly.com/question/15167411#

#SPJ11

According to the mole concept, the number of moles in 50 g of NO₂ is 1.086 as molar mass of NO₂ is 46 g and as per STP conditions volume is 24.32 L.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Initially the number of moles is calculated as, 50/46=1.086 moles . As 1 mole occupies 22.4 L at STP conditions,1.086 moles occupy 1.086×22.4=24.32 L.

Hence, the volume in liters of 50 g of NO₂ at STP is 24.32 L.

Learn more about moles,here:

https://brainly.com/question/20486415

#SPJ2