Please help also could u put explanation

Answer: 120.9 grams

Explanation:

Given the question : How many grams are in 3.67 moles of Lithium cyanide?

Chemical formula of lithium cyanide = LiCN

Molar mass of LiCN: Li = 6.941 ; C = 12, N = 14

LiCN = (6.941 + 12 + 14). = 32.941 g/mol

(Gram of substance / mole of substance) = (molar mass of substance / one mole)

(Gram of substance / 3.67) = (32.941 / 1)

= gram * 1 = 3.67 * 32.941

Gram of substance = 120.89347

= 120.9 grams

Answer:

Four substitution products are obtained. The carbocation that forms can react with either nucleophile (H2O or CH3OH) from either the top or bottom side of the molecule

Explanation:

An SN1 reaction usually involves the formation of a carbocation in the slow rate determining step. This carbocation is now attacked by a nucleophile in a subsequent fast step to give the desired product.

However, the product is obtained as a racemic mixture because the nucleophile may attack from the top or bottom of the carbocation hence both attacks are equally probable.

The attacking nucleophile in this case may be water or CH3OH

Answer:The answer is D i got this answer because, the oldest layers are at te bottom and the youngest layers are on the top.

hope this answer heps!

Answer:

oxygenicity values

Explanation:

The measurable value upon which Avogadro established his scale is called oxygenicity values.

It is similar to the concept of modern-day  electronegativity in that when two electrified bodies are in contact, the electrical potential between the bodies in contact is a measurable value.

This idea bears a striking similarity to our modern-day concept of electronegativity which is defined as a measure of the ability of an atom in a bond to attract electrons towards itself.

Answer:

Xe

Explanation:

noble gas is in the last column of the periodic table.

Zr is in Period 5

Answer: c

Explanation:

different substances can react differently to heat.

Answer: c

Explanation:

different substances can react differently to heat.

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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Answer:

Valence electrons in XeCl2 = 8 + 7 + 7 = 22.

Bonding electrons = 4.

Nonbonding electrons = 18.

Explanation:

Hello.

In this case, you can see the Lewis structure on the attached picture, in which you can see that there are since xenon has 8 valance electrons and each chlorine has 7 valence electrons, the total amount of valence electrons is:

Valence electrons in XeCl2 = 8 + 7 + 7 = 22.

Moreover, since each chlorine atom is bonding with one of the eight electrons of xenon (Lewis structure), we can see there are 4 bonding electrons.

Finally, since there are six nonbonding electrons per chlorine atom and six nonbonding electrons in xenon, the overall nonbonding electrons are:

Nonbonding electrons in XeCl2 = 6 + 6 + 6 = 18.

Regards.

Answer:

Another word for vapor is gas.

Answer:

Another name for vapour is gas

Answer:

No we can’t cover the earth with one mole of pennies

Explanation:

We can’t cover the earth with one mole of pennies due to the fact that making this possible will require the flattening and extra expansion before it covers the whole surface.

The extra expansion and flattening with result in the loss of intermolecular forces and won’t remain as a solid and form other states of matter which won’t be able to cover the surface.

Answer:same but answer

Explanation:yeah confusing

Answer:

388.62

Explanation:

well you convert yards into feet and feet into inches and inches into centimeters

Answer:

the answer would be 0.666 mL

Explanation:

10g is 66% of 15g

Answer:

10% is a share in NAMSEK worth as a percentage of a share in ODX Group Inc., in year 4

The share of NAMSEK in year 4 is around $  shares (as given from the above table). Hence the value of one share will be $2.5/share

The share of ODX Group Inc., in year 4 is around $ shares (as given from the above table). Hence the value of one share is $

Therefore a share in NAMSEK worth as a percentage of a share in ODX Group Inc., in year 4 will be  

= 0.1 or 10 %

Neutrons as protons determine the element

Answer:

According to the following balanced reaction, how many moles of HNO3 are formed from 8.61 moles of NO2 if there is plenty of water present?

Explanation:

According to the following balanced reaction, how many moles of HNO3 are formed from 8.61 moles of NO2 if there is plenty of water present?

The remaining grams of excess reactants NO is 0.68 g.

To balance the given redox reaction NO+Fe2+—>NO2- +Fe2+ we can follow the half-reaction method. Let's first write the unbalanced reaction:Fe2+ + NO → Fe3+ + NO2-Break down the reaction into two half-reactions:Fe2+ → Fe3+NO → NO2-The balanced half-reactions are:Fe2+ → Fe3+ + e- (multiply by 1)NO + H2O → NO2- + 2 H+ + e- (multiply by 2)The number of electrons lost in the oxidation half-reaction must be equal to the number of electrons gained in the reduction half-reaction. To balance the electrons, we multiply the oxidation half-reaction by 2:2 Fe2+ → 2 Fe3+ + 2 e-Balance the overall reaction by multiplying the reduction half-reaction by 2:2 NO + 2 H2O → 2 NO2- + 4 H+ + 2 e-The final balanced equation is:2 Fe2+ + 2 NO → 2 Fe3+ + 2 NO2-Now, let's calculate the mass of Fe that is optimal and the remaining grams of excess reactant. We are given that 20.0 g of NO are reacted with 31.4 g of Fe2+.The balanced equation shows that 2 moles of Fe2+ react with 2 moles of NO, which means the mole ratio is 1:1. Using the molar mass of Fe2+, we can convert the given mass of Fe2+ into moles:31.4 g Fe2+ x (1 mol Fe2+ / 55.845 g) = 0.561 mol Fe2+According to the balanced equation, 1 mole of Fe2+ reacts with 1 mole of NO. Therefore, 0.561 mol of NO must react with 0.561 mol of Fe2+. Using the molar mass of NO, we can convert the given mass of NO into moles:20.0 g NO x (1 mol NO / 30.01 g) = 0.666 mol NOWe have more moles of NO than the stoichiometrically required amount, which means NO is the excess reactant. To find the amount of Fe2+ that is optimal, we need to calculate the moles of Fe2+ required to react with 0.666 mol of NO:0.666 mol NO x (1 mol Fe2+ / 1 mol NO) = 0.666 mol Fe2+Therefore, the mass of Fe2+ that is optimal is:0.666 mol Fe2+ x 55.845 g/mol = 37.25 g Fe2+To find the remaining grams of excess NO, we subtract the amount of NO that reacted from the initial amount of NO:20.0 g NO - (0.666 mol NO x 30.01 g/mol) = 0.68 g NO.

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Given parameters:

Number of atoms of Mn = 3.22 x 10²²atoms

Mass of the bone = 1kg

Unknown:

Mass of Mn = ?

To solve this problem:

Road map

The number of moles is the amount of a substance that contains the Avogadro's number of particles 6.02 x 10²³

Molecular mass is the mass in grams of one mole of the substance.

Number of particles are elementary particles such as atoms, molecules, formula units, ions, electrons, protons, neutrons e.t.c

     Number of moles  = [tex]\frac{number of particles}{6.02 x 10^{23} }[/tex]

    Mass  = number of moles x molecular mass

Input parameters,

  number of particles = Number of moles of Mn = [tex]\frac{number of particles}{6.02 x 10^{23} }[/tex]

                       Number of moles of Mn = [tex]\frac{3.22 x 10^{20} }{6.02 x 10^{23} }[/tex]   = 0.53 x [tex]10^{-3}[/tex]moles

To find the unknown mass, we need to know the molecular mass of Mn. This value is found on the periodic table and it is 55g/mol

   So, mass of Mn  = number of moles of Mn x molecular mass of Mn

                               = [tex]0.53 x 10^{-3}[/tex] x  55

                                = 0.029g

Mass of Mn contain in 1kg of bone is 0.029g

The mass (g) that should be found in 1 kg of bone is 0.029g.

Here we understand the relationship between a number of moles, mass, molecular mass, and a number of particles. Now Solve for the number of moles by using the number of atoms given. And, Using the number of moles we determine the mass of the unknown. Finally, understand the relationship between the number of moles, mass, molecular mass, and a number of particles.

The number of moles should be the amount of a substance that comprise of the Avogadro's number of particles 6.02 x 10²³. Molecular mass represent the mass in grams of one mole of the substance. And, the number of particles should be  elementary particles like atoms, molecules, formula units,etc.

We know that

   Mass  = number of moles x molecular mass

So,

The number of moles should be [tex]= 3.22x10^{23} \div 6.02x10^{23}[/tex]

= [tex]0.53 \times 10^{-3}[/tex] moles

Now

Mass of mn should be

= number of moles of Mn x molecular mass of Mn

= [tex]0.53 \times 10^{-3} \times 55[/tex]

=  0.029g.

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Answer:

Chromium Nitride

Explanation:

Answer:

a. electrophilic aromatic substitution

b. nucleophilic aromatic substitution

c. nucleophilic aromatic substitution

d. electrophilic aromatic substitution

e. nucleophilic aromatic substitution

f. electrophilic aromatic substitution

Explanation:

Electrophilic aromatic substitution is a type of chemical reaction where a hydrogen atom or a functional group that is attached to the aromatic ring is replaced by an electrophile. Electrophilic aromatic substitutions can be classified into five classes: 1-Halogenation: is the replacement of one or more hydrogen (H) atoms in an organic compound by a halogen such as, for example, bromine (bromination), chlorine (chlorination), etc; 2- Nitration: the replacement of H with a nitrate group (NO2); 3-Sulfonation: the replacement of H with a bisulfite (SO3H); 4-Friedel-CraftsAlkylation: the replacement of H with an alkyl group (R), and 5-Friedel-Crafts Acylation: the replacement of H with an acyl group (RCO). For example, the Benzene undergoes electrophilic substitution to produce a wide range of chemical compounds (chlorobenzene, nitrobenzene, benzene sulfonic acid, etc).

A nucleophilic aromatic substitution is a type of chemical reaction where an electron-rich nucleophile displaces a leaving group (for example, a halide on the aromatic ring). There are six types of nucleophilic substitution mechanisms: 1-the SNAr (addition-elimination) mechanism, whose name is due to the Hughes-Ingold symbol ''SN' and a unimolecular mechanism; 2-the SN1 reaction that produces diazonium salts 3-the benzyne mechanism that produce highly reactive species (including benzyne) derived from the aromatic ring by the replacement of two substituents; 4-the free radical SRN1 mechanism where a substituent on the aromatic ring is displaced by a nucleophile with the formation of intermediary free radical species; 5-the ANRORC (Addition of the Nucleophile, Ring Opening, and Ring Closure) mechanism, involved in reactions of metal amide nucleophiles and substituted pyrimidines; and 6-the Vicarious nucleophilic substitution, where a nucleophile displaces an H atom on the aromatic ring but without leaving groups (such as, for example, halogen substituents).

Answer:

Average atomic mass = 79.9035 amu.

The given element is bromine.

Explanation:

Given data:

Mass of 1st isotope = 78.9183 amu

Percent abundance of 1st isotope = 50.69%

Mass of 2nd isotope = 80.9163 amu

Percent abundance of 1st isotope = 49.31%

Average atomic mass = ?

Solution:

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass  = (50.69×78.9183 )+(49.31× 80.9163) /100

Average atomic mass =  4000.3686+ 3989.9828 / 100

Average atomic mass  = 7990.3514 / 100

Average atomic mass = 79.9035 amu.

The given element is bromine.

Answer:

the energy of photons emitted by electron dropping from an excited energy state

Answer:

Total cost = 1007.80 (Approx)

Explanation:

Given:

Length of fence = 125 m

Require = 30 nails per meter

40 nails cost = 10.75

Find:

Total cost

Computation:

Total nails require = 125 x 30

Total nails require = 3750

Total cost = 1007.80 (Approx)

Answer: An object can change velocity in a number of ways: it can slow down, it can speed up, or it can change direction. A change in speed, or a change in direction, or a change in both speed and direction means that the object has a change in velocity.

Explanation:

Answer:

heterogeneous mixture

Explanation:

because pizza has different phases I think

The type of mixture that pizza can be classified is Heterogeneous mixture

Therefore, heterogeneous mixture can be regarded as one having more than a substance.

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Answer:

When you drive down a mountain, what makes you experience those interesting and sometimes uncomfortable sensations? The air pressure outside is going up. As that is happening, the air pressure in your ear drum is being compressed. The air from your throat is going up.

Explanation:

Answer:

6) D

7)A

Explanation:

Answer:

electrostatic forces of attraction

Answer:

Explanation:

The force acting on an object can be found by using the formula

From the question

mass = 70 kg

acceleration = 4 m/s²

We have

force = 70 × 4

We have the final answer as

Hope this helps you