For the following questions state the oxidation number of the element in the given compound.
1. sul fur in Li2SO#3
2. chlorine in MgCl2
3.Silicon in SiO2
4.sul fur in H2SO4
5.Sulfur in SO4^2-
6. manganese in MnO4^-
7. Cr in Cr2O7^2-

Hydrohalogenation Reaction:

The substitution of hydrogen and halide levels across a double bond takes place. The halide group is connected to the carbon with more substituents. The product will affect by the presence of peroxide

Ethene is a symmetrical alkene having two carbon atoms. It reacts with HBr in the presence of CCl4, producing bromoethane or ethyl bromide (CH3CH2Br). Propene is an unsaturated alkene consisting of a three-carbon chain with two carbon particles on either side of the double bond.

Ethene is a symmetrical alkene including two carbon atoms. It reacts with HBr in the presence of CCl4, producing bromoethane or ethyl bromide (CH3CH2Br). Propene is an unsaturated alkene consisting of a three-carbon chain with two carbon atoms on either flank of the double bond.

To learn more about hydrohalogenation, refer

https://brainly.com/question/14529644

#SPJ9

Answer:

0.645 L

Explanation:

To find the volume, you need to (1) convert grams to moles (using the molar mass) and then (2) calculate the volume (using the molarity ratio). The final answer should have 3 sig figs to match the sig figs of the given values.

(Step 1)

Molar Mass (KOH): 39.098 g/mol + 15.998 g/mol + 1.008 g/mol

Molar Mass (KOH): 56.104 g/mol

19.9 grams KOH              1 mole
--------------------------  x  -----------------------  =  0.355 moles KOH
                                     56.014 grams

(Step 2)

Molarity = moles / volume                            <----- Molarity ratio

0.550 M = 0.355 moles / volume                 <----- Insert values

(0.550 M) x volume = 0.355 moles              <----- Multiply both sides by volume

volume = 0.645 L                                          <----- Divide both sides by 0.550

The acid dissociation constant of a weak monoprotic acid if the concentration of the acid is 0.3M and it has a pH of 3 is 3 × 10⁻⁶.

The acid dissociation constant (Ka) is the equilibrium constant for an acid dissociation reaction.

Let's consider the acid dissociation of a generic weak acid.

HA(aq) = H⁺(aq) + A⁻(aq)

The pH of the solution is 3.

pH = -log [H⁺]

[H⁺] = antilog -pH = antilog -3 = 1 × 10⁻³ M

The concentration of the acid (Ca) is 0.3 M. For a weak monoprotic acid, we can calculate the acid dissociation constant using the following expression.

[H⁺] = √(Ca × Ka)

Ka = [H⁺]² / Ca

Ka = (1 × 10⁻³)² / 0.3 = 3 × 10⁻⁶

The acid dissociation constant of a weak monoprotic acid if the concentration of the acid is 0.3M and it has a pH of 3 is 3 × 10⁻⁶.

Learn more about weak acids here: https://brainly.com/question/15192126

#SPJ1

The solubility of AgCl is 18 × [tex]10^-^1^0[/tex] in a 0.1M solution of CuCl₂.

The amount of a substance that can dissolve completely in a solvent at a specific temperature is known as its solubility. A saturated solution is one such example.

The maximum number of moles per liter of solution can be dissolved before the solution becomes saturated.

The equilibrium in the saturated solution will be as :

[tex]AgCl[/tex] ⇄ [tex]Ag ^+ + Cl ^-[/tex]

 [tex]a[/tex]           [tex]a[/tex]         [tex]a[/tex]

[tex]CuCl_2[/tex] ⇄ [tex]Cu^2^+ + Cl^-[/tex]

  [tex]0.1[/tex]        [tex]0.1[/tex]          [tex]0.1[/tex]

Ksp = [tex]1.8[/tex] × [tex]10^ -^1^0[/tex]

The solubility product constant: Ksp is the equilibrium constant for the dissolving of an ionic compound in water. Ksp is a function of temperature.

[tex]ksp AgCl = [ Ag ^+ ] [ Cl^-]\\[/tex]

             [tex]= a[/tex]×[tex][ a + 0.1][/tex]

             [tex]= a^2 + 0.1a[/tex]

[tex]a^2[/tex] is very small, so it is neglected.

ksp AgCl = 0.1a

[tex]1.8[/tex] × [tex]10^ -^1^0[/tex] = 0.1a

a = 18 × [tex]10^-^1^0[/tex]

Therefore, the solubility of AgCl is 18 × [tex]10^-^1^0[/tex].

Learn more about solubility here:

https://brainly.com/question/4529762

#SPJ1

Heating up a reaction does increase the number of collision only.

Hence, Option C is correct answer.

According to the collision theory, the reaction take place when the collision occur and molecules having sufficient energy or threshold energy for collision.

The collision of molecules depend on the kinetic energy of molecules. Greater the kinetic energy greater the number of molecules collide. Lesser the kinetic energy lesser will be collision.

With an increase in temperature, there is an increase in energy that can be converted into activation energy in a collision, and that will increase the reaction rate. A decrease in temperature would have the opposite effect. With an increase in temperature, there is an increase in the number of collision.

Thus from the above conclusion we can say that Heating up a reaction does increase the number of collision only.

Hence, Option C is correct answer.

Learn more about collision theory here:

https://brainly.com/question/14566831

#SPJ1

No, the mass does not change.

Freezing is a change in physical state, not a chemical reaction. No matter is added or taken away.

As water transitions to ice, no molecules are lost; it is boiling so it is not turning into a gas. There is a very, very small amount of mass lost in the form of energy as the water loses it's heat, but this amount of mass is so insignificant it practically can't be measured. In other words, it's negligible.

Answer:

2.52 g NaCl

Explanation:

(Step 1)

To find the mass, you first need to find the moles NaCl. This value can be found using the molarity ratio:

Molarity = moles / volume (L)

After you convert mL to L, you can plug the given values into the equation and simplify to find moles.

136.9 mL / 1,000 = 0.1369 L

Molarity = moles / volume

0.315 M = moles / 0.1369 L

0.0431 = moles

(Step 2)

Now, you can use the molar mass to convert moles to grams.

Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol

Molar Mass (NaCl): 58.443 g/mol

0.0431 moles NaCl           58.443 g
------------------------------  x  -------------------  =  2.52 g NaCl
                                            1 mole

Based on our finding these two compounds are not same they are completely different from each other as Formula of both compounds are different, their appearance is also different from each other.

The formula of the Iron II oxide is FeO. Common name of Iron (II) Oxide is Ferrous Oxide. Iron (II) Oxide is a black colored powder. The mineral form of Iron (II) oxide is known as Wustite. Iron (II) Oxide is used as a pigment. It is also used to make dyes.

The formula of the Iron (III) Oxide is Fe₂O₃. Common name of Iron (III) Oxide is Ferric oxide. Iron (III) Oxide appears as Red-Brown solid. It is also known as Hematite. Iron (III) oxide is used as pigments. It is used in dental composites , cosmetics. It is also used to apply the final polish on metallic jewellery.

Thus from the above conclusion we can say that Based on our finding these two compounds are not same they are completely different from each other as Formula of both compounds are different, their appearance is also different from each other.

Learn more about the Iron (II) Oxide here: https://brainly.com/question/14143857
#SPJ1

Answer:

2 Al and 3 S

Explanation:

Al2S3 so 2 Al and 3 S

The first step in clearing a clogged ballpoint pen is to exert additional pressure when scrawling and drawing vertical lines on paper. If this approach doesn't work, dip the pen's tiny tip in rubbing alcohol. [Only the tidbit] Any dried-up or hardened ink on the tip will dissolve with this.

The mass of pentane the student should weigh out is

The density of pentane is 0.626 gcm-3

To calculate the mass of pentane following expression is used,

(Density is defined as the mass divide by volume)

Density = mass / volume

mass of pentane = Density of pentane * Volume of pentane

mass of pentane = 0.626 gcm-3 * 45.0 mL

                             = 28.17 g

Here the unit of mass of pentane is g,

However the unit of density is gcm-3 and unit of volume is mL i.e. cm3

Hence,   Mass = gcm-3 * cm3

              Mass = g

The mass of pentane the student should weigh out is 28.17g

Learn more about Density on

https://brainly.com/question/1354972

#SPJ1

ClO(4)− is regarded as perchlorate ion and are produced commercially in most situations as salts via industries and in the laboratory.

This ion is referred to as a monovalent inorganic anion and is obtained by deprotonation of perchloric acid. It is composed of chlorine and oxygen atoms in the ratio 1 to 4 respectively.

This has  32 valence electrons available in the Lewis structure and is used in the commercial production of solid rocket fuel.This ion has a molar mass of 99.451 g mol−1 and is used in different processes such as an oxidizer and to control static electricity during the process of food preservation in industries.

Therefore ClO₄− is also regarded as perchlorate ion and is the most appropriate choice.

Read more about Perchlorate ion here https://brainly.com/question/16895150

#SPJ1

Answer:

d

Explanation:

d

Concentrated phosphoric acid is added to the reaction mixture in the synthesis of aspirin to maintain the acidic environment and to keep the reagents protonated.

Phosphoric acid is an inorganic acid with the molecular H₃PO₄.

Its a triprotic acid which means that one molecule of the acid produces 3 molecules of hydrogen ions.

Phosphoric acid is important for many laboratory as well as industrial uses. It can be serve as buffer in living organisms.

It also used in the synthesis of aspirin.

The synthesis of aspirin requires an acidic environment. Therefore, concentrated phosphoric acid is added to the reaction mixture in the synthesis of aspirin to maintain the acidic environment and to keep the reagents protonated.

In conclusion, Phosphoric acid ensures an acidic environment in the synthesis of aspirin.

Learn more about phosphoric acid at: https://brainly.com/question/8031899

#SPJ1

The specific heat of the metal, given the data from the question is 0.60 J/gºC

The following data were obtained from the question:

The specific heat capacity of the sample of gold can be obtained as follow:

According to the law of conservation of energy, we have:

Heat loss = Heat gain

MC(T –Tₑ) = MᵥᵥC(Tₑ – Tᵥᵥ)

74 × C(94 – 32) = 120 × 4.184 (32 – 26.5)

C × 4588 = 2761.44

Divide both side by 4588

C = 2761.44 / 4588

C = 0.60 J/gºC

Thus, the specific heat capacity of the metal is 0.60 J/gºC

Learn more about heat transfer:

https://brainly.com/question/6363778

#SPJ1

Salt-water that dehydrates someone who drinks is NOT an example of a colligative property (Option D).

Colligative Properties make reference to physical properties associated with solute concentration instead of its intrinsical characteristics.

Some examples of colligative properties include boiling state, vapour pressure, and osmotic pressure due to the presence of ionic particles.

In conclusion, salt-water that dehydrates someone who drinks is NOT an example of a colligative property (Option D).

Learn more about Colligative Properties here:

https://brainly.com/question/23480761

#SPJ1

A bandage falling into a prepared dish could be considered an example of physical contamination.

Physical contamination occurs when a physical object enters food at some level of the manufacturing or preparation procedure. Physical objects in meals may be a choking hazard and regularly introduce biological contaminants as well.

It may arise at any stage of food delivery and preparation. Physical contamination can reason critical damage to the consumer, which includes broken teeth or choking. Varieties of contaminants that can be found in food include jewelry, hair, plastic, bones, stones, pest bodies, and material.

Chemical contamination takes place while food is infected through chemical compounds. Some of the reasons for chemical contamination are cleansing merchandise or pesticides and herbicides from unwashed fruit and vegetables. Examples of chemical contaminants are commercial chemical substances and agricultural chemicals.

Learn more about contamination here https://brainly.com/question/18350489

#SPJ1

Fe3+(yellow) + SCN-(colorless) <--> [FeSCN]2+(dark red)

If Fe3+ is added to the solution the solution turns darker red

While precipitating out Fe3+ (as Fe(OH)3) or SCN- (as AgSCN) will push the equilibrium to the left, consuming the complex and reducing color intensity, the addition of Fe3+ or SCN- will push the equilibrium to the right, creating more complex and intensifying the color.

The pace of reaction rises as Fe3+ levels rise. The concentration of SCN reduces as the rate rises.

The FeSCN2+ complex, which is created when iron(III) and thiocyanate ions react, displays an extremely strong blood red color (or orange in diluted solution), making it simple to detect and quantify using spectrophotometry.

To learn more about Fe3+ and SCN reaction please visit -
https://brainly.com/question/14575042
#SPJ1

Answer:

okkkk zjjdjdjdjduxuxu

S denotes the ''number of shared electron pairs by an atom'', Hence, Silicon transmits its 4 electrons with 4 Cl-atoms. Thus the Value of S is 4 in SiCl₄ .It is also known as covalency

Silicon Tetrachloride is a transparent, colorless, fuming liquid with an irritating odor. It is used to create Silicon-containing chemicals and in chemical analysis. determine potentially hazardous frontages.

Silicon tetrachloride is designed by the chlorination of various silicon compounds such as ferrosilicon, silicon carbide, or mixtures of silicon dioxide and carbon. The ferrosilicon route is most familiar. In the laboratory, SiCl 4 can be prepared by dining silicon with chlorine on 600 °C (1,112 °F): Si + 2 Cl 2 → SiCl.

To learn more about Silicon Tetrachloride, refer

https://brainly.com/question/19493575

#SPJ9

Answer:0

Explanation:

Since oxygen gas i.e., diatomic oxygen exists in the atmosphere in the free state, hence the oxidation state of each atom will be 0

Explanation:

Reasons why you should not dispose of chemicals down drains

Pipes, especially older pipes, can leak at connections or where they have been damaged. Often large pipes, like storm water pipes or really large sewage mains, are made out of concrete so at places where two pipes meet, there can be minor leaks. It’s not a big deal when it’s just a little bit of storm water leaking, but if chemicals are also in this water, you’ve just given them a direct path to contaminating drinking water! Also, some of Indianapolis’s infrastructure is very old, and pipes used to be made out of things like bricks and hollowed out trees which will also leak.

Disposing of chemicals down drains can damage your plumbing which can be expensive to repair and also allow those chemicals a direct path into the groundwater.

Improperly disposing of chemicals at your site can lead to environmental contamination of your site which can be time consuming and expensive to clean up.

The directions that are likely to result in a warmer earth are the directions 3, 5 and 6.

The term global warming has to do with the gradual rise in the temperature of the earth as a result of the re-radiation of infrared rays back to the earth. We know that greenhouse gases are able to trap the infrared rays from the sun and reradiate same to the surface of the earth and this ultimately leads to a warmer earth.

As such, if we look at the image closely, we can see that there is a reradiation of the rays to the earth in the directions 3, 5 and 6. It then follows that the directions that are likely to result in a warmer earth are the directions 3, 5 and 6.

Learn more about global warming: https://brainly.com/question/12908180

#SPJ1

The correct answer would be 0.034 g/L.

What we are trying to do here is to convert from milligram to gram and from deciliter to liter.

First, let's do the milligram to gram conversion.

1 mg = 0.001 g

Therefore,

3.4 mg = 3.4 x 0.001 = 0.0034 g

In order to convert from deciliter to liter.

1 deciliter = 0.1 L

Thus, 3.4 mg/dL = 0.0034g/0.1 L = 0.034 g/L

More on unit conversion can be found here: https://brainly.com/question/11543684

#SPJ1

Organic transformation sequential equation using catalysts will be as follows:

2CH3-CH2-O => (alc. KOH) => CH2=CH2 + KCl + H2O => (Br2/CCl4) => CH2Br-CH2Br + Zn

CH2Br-CH2Br + Zn => (HBr /Pd) => CH2=CH2+ZnBr2

As can be visualized from above organic transformation equation, conversion of dry ether in presence of alkaline potassium hydroxide results in formation of unstable ethene. This dry unsaturated compound of ethene is stabilized by reaction that happens in presence of bromine or calcium tetrachloride as the catalyst which results in formation of ethylene bromide which in presence of highly efficient palladium as catalyst results in formation of stable ethene as byproduct. Thereby with formation of stable compound of ethylene, it releases zinc bromide as byproduct resulting completion of reaction equation. This stable product ethene is a double bonded carbon structure that is chemically extremely flammable and has planar structure.

To know more about organic transformation:

brainly.com/question/14413579

#SPJ1

Answer:

See below

Explanation:

370 g  /  .090 g/l = _____?___   liters

take that answer    then :

  ? liters   /   22.4 liters / mole   = # moles     done!

There are approximately 183.50 moles of hydrogen gas in 370.g of hydrogen gas.

The number of moles in 370.g of hydrogen gas using the given information.

In the given example,

Density of hydrogen gas = 0.090 g/L

Molar volume at normal pressure and 0.214°C = 22.4 L/mol

So, we  calculate the volume of hydrogen gas (in L) using the given mass and density:

Volume (in L) = mass (in g) / density (in g/L)

Volume (in L) = 370.g / 0.090 g/L

Volume (in L) ≈ 4111.11 L

By using the molar volume, calculate the number of moles:

moles = Volume (in L) / Molar volume (in L/mol)

moles = 4111.11 L / 22.4 L/mol

moles ≈ 183.50 moles (rounded to two decimal places)

Hence, there are approximately 183.50 moles of hydrogen gas in 370.g of hydrogen gas.

Learn more about Moles, here:

https://brainly.com/question/34302357

#SPJ3

the rate of cooling decreases

Taking into account the reaction stoichiometry and definition of limiting reactant, AgNO₃ will be the limiting reagent.

In first place, the balanced reaction is:

Cu + 2 AgNO₃  → 2 Ag + Cu(NO₃)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 1 mole of Cu reacts with 2 moles of AgNO₃, 1.8 moles of Cu reacts with how many moles of AgNO₃?

[tex]amount of moles of AgNO_{3} =\frac{1.8 moles of Cux2 moles of AgNO_{3} }{1 mole of Cu}[/tex]

amount of moles of AgNO₃= 3.6 moles

But 3.6 moles of AgNO₃ are not available, 2 moles are available. Since you have less moles than you need to react with 1.8 moles of Cu, AgNO₃ will be the limiting reagent.

In summary, AgNO₃ will be the limiting reagent.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

#SPJ1

Answer:

445 mL NH₄Br

Explanation:

(Step 1)

Convert grams ammonium bromide (NH₄Br) to moles using its molar mass.

Molar Mass (NH₄Br): 14.007 g/mol + 4(1.008 g/mol) + 79.904 g/mol

Molar Mass (NH₄Br): 97.943 g/mol

8.42 grams NH₄Br                1 mole
-----------------------------  x  ------------------------  =  0.0860 moles NH₄Br
                                         97.943 grams

(Step 2)

Calculate the volume of NH₄Br using the molarity equation. Then, convert liters (L) to milliliters (mL).

Molarity (M) = moles / volume (L)

0.193 M = 0.0860 moles / volume

(0.193 M) x volume = 0.0860 moles

volume = 0.445 L

1,000 mL = 1 L

0.445 L NH₄Br           1,000 mL
------------------------  x  ------------------  =  445 mL NH₄Br
                                        1 L