Compare the polymerisation reaction used to produce poly(ethene) with the
polymerisation reaction used to produce a polyester.​

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass of liquid = 0.165 g

Next we change the volume from L to mL using the conversion

1 L = 1000 mL

We have

If 1 L = 1000 mL

Then 0.000295 l = 1000 × 0.000295

volume = 0.295 mL

The density is

\(density = \frac{0.165}{0.295} \\ = 0.55932203...\)

We have the final answer as

Hope this helps you

There are approximately 1.765 x 10²³ molecules of KCl in 21.89 grams of KCl.

Potassium chloride (KCl) is a compound made up of potassium and chloride ions. It is a colorless, odorless salt that is commonly used in a variety of applications.

Molar mass of KCl is 74.55 g/mol; number of moles = Mass/ Molar mass

So, the number of moles = 21.89 g ÷ 74.55 g/mol = 0.2936 mol

and the number of molecules = Number of moles * Avogadro's number

Number of molecules = 0.2936 mol x 6.02 x 10²³ molecules/mol

Number of molecules = 1.765 x 10²³ molecules

Therefore, there are approximately 1.765 x 10²³ molecules of KCl in 21.89 grams of KCl.

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Q_w = 307.3 J

C_m = .233 J/g•K

%error = 39.95%

For simplicity's sake, I'm relabeling

Q_w as Q1

m_w as m1

C_w as c1

T_eq as T2

T_w as T1

Q_m as Q2

m_m as m2

C_m as c2

experimental value as exp

actual value as actual

Question 1

Q1 = m1•c1•(T2-T1)

Identify what you know

m1 = 124g

c1 = 4.13 J/g • K

T2 = Final temperature = 22.3°C

T1 = Initial temperature = 21.7°C

Convert Celsius to Kelvin (C+273.15=K)

T2 = 295.45 K

T1 = 294.85 K

Plug in

Q1 = 124g•(4.13 J/g•K)•(295.45K - 294.85K)

Solve

Q1 ≈ 307.3 J

Question 2

-Q1 = Q2 = m2•(c2)•(T2-100)

Ignore Q2 for a second, and you're left with

-Q1 = m2•(c2)•(T2-100)

which is the same thing.

Identify what you know

Q1 = 307.3 J

m2 = 17g

T2 = 22.3°C

Plug in

-(307.3J) = 17g • c2 • (22.3°C-100°C)

Solve

-307.3 J = (-1320.9 g•°C) • c2

c2 = .233 J/g•°C or J/g•K (I'll explain later)

Question 3

%err = ((exp - actual)/actual) • 100%

Identify what you know

exp = .233 J/g•K

actual = .388 J/g•K

Plug in

%err = ((.233 J/g•K - .388 J/g•K)/ .388 J/g•K) • 100%

Solve

%err = -39.95 %

Take the absolute value

%err = 39.95%

Referring to earlier change in units:

The reason we can not use the K value of T2 (295.45K) is because the formula provided (T2-100) does not account for T2 being in K. It only accounts for T2 being in °C.

Answer:

coefficient

Explanation:

It a part of the equation

Answer:

the answer is D. Because the 1 atm pressure of water is 40.65 or 40.7.

226 kJ energy does it take to boil 100 mL of water. Hence, option D is correct.

Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.

226 kJ energy does it take to boil 100 mL of water because 1 atm pressure of water is 40.65 or 40.7.

Hence, option D is correct.

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Answer:

Anstree species was preserved as a fossil in the Arizona desert. The species is now extinct. its because we preserved it right so that mean even to it fell down its still alive for the simple reason that we dint ruin it

Answer:

HBr+LiOH->H2O+LiBr

Explanation:

Hydrogen and Lithium ions have a charge of +1, Bromine and Hydroxide ions have a charge of -1. Therefore, the result.

Answer:

The answer is C... I am almost positive.

Answer:

990

Explanation:

Answer:

This question is incomplete

Explanation:

This question is incomplete but some general explanation provides a clear answer to what is been asked in the question.

An ionic/electrovalent compound is a compound whose constituent atoms are joined together by ionic bond. Ionic bond is a bond involving the transfer of valence electron(s) from an atom (to form a positively charged cation) to another  atom (to form a  negatively charged anion). The atom transferring is usually a metal while the atom receiving is usually a non-metal.

For example (as shown in the attachment), in the formation of NaCl salt, the sodium (Na) transfers the single electron (valence) on it's outermost shell to chlorine (Cl) which ordinarily has 7 electrons on it's outermost shell but becomes 8 after receiving the valence electron from sodium. It should also be noted that Na is a metal while Cl is a non-metal.

The chef is in charge of dashing into any station in need of support, which means they need a working knowledge of all areas, from meat to veggies to sauce is the chef de tournant.

Tom was most likely just get hired for the role of a sous chef.

Roles like bussers, who clear tables, dishwashers, cooks, and anyone else who handles the “invisible” parts of food service are all considered to be back of the house.  

Food service vocabulary has become so well-established over time that the US Department of Labor even created an occupational handbook outlining over 170 of the key terms used today. True

As long as you live by the unspoken kitchen code, you will have the space to eventually spread your own wings and exert your skills and professionalism in a way that commands respect.. True

Much of the kitchen ethos of professionalism is written on the walls of the kitchen and is discussed during a job interview. False

In a professional kitchen setting, any roles that don’t involve cooking or food prep are not considered an important part of the overall process. False

Julia Child collaborated with a friend to create the now legendary cookbook Mastering the Art of French Cooking which quickly transitioned into her having her own television show. True

The five mother sauces are not just part of the culinary world, they are the building blocks what for most of the dishes that we enjoy today.

Marie-Antoine was the great chef took his culinary craft one step further by also becoming a restaurant owner and a writer, in addition to taking the art of French cooking into the modern age, according to many in the industry.

Catherine de’ Medici married Henry II, who later became King of France, and created a powerful culinary union of Italian and French culture that changed European cuisine forever.

From small restaurants with only a few kitchen staff to giant industrial kitchens, executive chefs are in charge of resolving any problems, making critical decisions, and taking on all leadership roles. True.

food service vocabulary is How we refer to a body of words associated with the industry that is critical knowledge for anyone hoping to understand the expectations, responsibilities, and ideas expressed in a working kitchen.

Individuals who work in this role have no interaction with the kitchen except to communicate orders and pick them up are known as crew waitstaff.

A kitchen is a room or part of a room used for cooking and food preparation in a dwelling or in a commercial establishment.

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Answer:

T =201.4k

Explanation:

pressure = 102000pa= 1.007atm

v = 8L

n = 0.487mole

R = 0.08206Latm.mol-¹k-¹

T = ?

12. A monosaccharide is exactly the type of molecule shown below, which is a carbohydrate.

Carbohydrates are composed of carbon, hydrogen and oxygen in the ratio 1:2:1 in organic molecules. The simplest type of carbohydrate is a monosaccharide, which cannot be broken down further into smaller sugar molecules. They typically have three to seven carbon atoms and are composed of a single sugar molecule.

13. An amino acid is a special type of molecule that is shown in the description. The production and structure of proteins largely depend on amino acids, which are the basic components of proteins.

14. Nucleic acids are primarily used by living things to store and transmit genetic information. DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), two types of nucleic acids, carry instructions necessary for the production of proteins as well as for the operation and growth of cells.

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Answer:

its 45 because of 49 og the

Pressure and volume can be regarded as the entity that is inversely proportional.

It should be noted that this explanatin an be done using the law in chemistry which is the Boyle's law which states that, for a given amount of gas and constant temperature, the volume is inversely proportional to the pressure.

However the Equal quantities of all gases can be seen to have same number of molecules when subjected to the same temperature and pressure (Avogadro's law).

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To predict the products of such a reaction, see what happens if the chemical breaks into smaller, familiar products such as water, carbon dioxide, or any of the gaseous elements

AgNO3+Na2SO4→AgSO4+2NaNO3 is an exchange reaction.

Na + O2→ Na2O .

is an exchange reaction.

Thus, we refer to these processes as redox. Na is oxidized by losing electrons in reaction (a), while O is reduced by gaining electrons, forming O2-ions.

A single-displacement reaction would be Mg + HBr > MgBr2 + H2 HBr + Mg. In this process, magnesium creates magnesium bromide by swapping out hydrogen from HBr (MgBr2).

The decomposition process CuSO4(aq) + Zn(s) ZnSO4(aq) + Cu(s) is an illustration.

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Answer:

They are more spread out.

Explanation:

The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.

Answer:

Explanation:

Explanation:

Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other. In most cases, there are essentially no attractive forces between particles

The elevated ridges of the brain are called gyri. Motor cortex are patches of gray matter that regulate skeletal muscle movement.

Cerebral cortex is the gray matter is located in the outermost region of the brain involved with integration.

Corpus callosum are large fiber tracts that allow the two hemispheres to communicate with each other.

The elevated ridges of the brain are called the gyri. Motor cortex are patches of gray matter that regulate skeletal muscle movement.

Cerebral cortex is the gray matter is located in the outermost region of the brain involved with integration. Corpus callosum are large fiber tracts that allow the two hemispheres to communicate with each other.

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Answer:1. metyletevinyl

4. (Z)-3-hydroxypropenal

Explanation:

Answer:

h20+co2= hco3

Explanation:

so that is not a single bond so it in gread 11 so I don't study it

Balance the following chemical equations:

1. N2 + 3 H2 → 2 NH3

Ex: Synthesis reaction

2. 2 KClO3 → 2 KCl + 3 O2

Single Replacement reaction

3. 2 NaF + ZnCl2 → ZnF2 + 2 NaCl

Decomposition reaction

4. 2 AlBr3 + 3 Ca(OH)2 → Al2(OH)6 + 6 CaBr2

Double Replacement reaction

5. 2 H2 + O2 → 2 H2O

Combustion reaction

6. 2 AgNO3 + MgCl2 → 2 AgCl + Mg(NO3)2

Synthesis reaction

7. 2 Al + 6 HCl → 2 AlCl3 + 3 H2

Decomposition reaction

8. C3H8 + 5 O2 → 3 CO2 + 4 H2O

Combustion reaction

9. 2 FeCl3 + 6 NaOH → Fe2O3 + 6 NaCl + 3 H2O

Double Replacement reaction

10. 4 P + 5 O2 → 2 P2O5

Synthesis reaction

11. 2 Na + 2 H2O → 2 NaOH + H2

Single Replacement reaction

12. 2 Ag2O → 4 Ag + O2

Decomposition reaction

13. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O

Combustion reaction

14. 2 KBr + MgCl2 → 2 KCl + MgBr2

Double Replacement reaction

15. 2 HNO3 + Ba(OH)2 → Ba(NO3)2 + 2 H2O

Double Replacement reaction

16. C5H12 + 8 O2 → 5 CO2 + 6 H2O

Combustion reaction

17. 4 Al + 3 O2 → 2 Al2O3

Synthesis reaction

18. Fe2O3 + 2 Al → 2 Fe + Al2O3

Single Replacement reaction

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The factor that  doesn’t change the resistance of a wire is pressure. option A.

Resistance is a conductor's capacity to thwart the passage of current. It is controlled by the interplay of the applied voltage and the electric current passing through it. The amount of opposition any object applies to the flow of electric current is referred to as resistance.

The ohm, a unit of measurement for resistance, is represented by the Greek letter omega. According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

Hence option A is correct.

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missing part;

The pressure

The length of the resistor.

The thickness of the resistor.

The temperature of the conductor.

These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)

A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct

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Note Complete Question

which is an example of a colloid?

a mixture that settles out,

b mixture that scatters light,

c mixture that is separated by filtration,  

d salt and water mixture?

The Medal of Honor is the best navy decoration and highest volume.

The President of the USA The Victoria go is the holy grail for Medal of Honor creditors because there are the best in lifestyles. Bearing the inscription For valor and called a VC, this medal turned into first offered for conspicuous bravery' in 1856 and later backdated to the Crimean conflict of 1854. The outstanding service pass is the second maximum army ornament that may be provided to a member of the American military, for intense gallantry and risk of lifestyle in actual combat with an armed enemy force.

The Bronze Star Medal dates lower back to world battle II. these days, it is the fourth-maximum ranking award a provider member can obtain for a heroic and meritorious deed performed in an armed battle. For individuals who acquire the BSM, it's far a sign of their sacrifice, bravery, and honor at the same time as serving their us of a

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Answer:

• One cubic centimeter is the same volume as 1 Millimetre .

These are the same measurement .

There is no difference in volume.

The primary difference is that milliliters are used for fluid amounts while cubic centimeters are used for solids.

No matter what is being measured .

Answer:

the Answer is A ball that has been thrown upward

Answer:

2266g

Explanation:

mass = no.of molecules /6.o23*1o(23) * molar mass

molar mass of co2= 44g /mol

1.5 .10^25/6.023 .10^23 =51.5 moles of co2

51.5 .44g/mol =2266 g

1 mole is equal to 6.023 × 10 ²³ molecules. 2266 grams are in 1.50 x 10²⁴ atoms of copper.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

The mole concept can be used to convert between mass and number of particles.

mass = number of molecules / 6.023 × 10²³ × molar mass

molar mass of CO2 = 44g /mol

1.5 .10^25 / 6.023 × 10^23

= 51.5 moles of CO2

= 51.5 .44g/mol

= 2266 g

Thus, 2266 grams are in 1.50 x 10²⁴ atoms of copper.

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According to Boyle's law, the pressure in the acetylene tank is 268.33 atmospheres.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

In the given problem , by substituting values in formula P₁V₁=P₂V₂, P₂=115×7/3=268.33 atmospheres.

Hence, the pressure in acetylene tank is 268.33 atmospheres.

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