Read the following statements carefully: X: It is a thick black coloured liquid which is obtained from coal.Y: It was used earlier in railway engines to produce steam to run trains.Z : It is used to run heavy vehicles such as buses, trucks, tractors, etc.X, Y and Z respectively are

Answers

Answer 1

Options are not given in the question. The complete question is as follows:

Read the following statements carefully: X: It is a thick black coloured liquid which is obtained from coal.Y: It was used earlier in railway engines to produce steam to run trains.Z : It is used to run heavy vehicles such as buses, trucks, tractors, etc.X, Y and Z respectively are

A. a. Coal tar b. Coal c. Diesel

B. a. Coal b. Paraffin wax c. Petrol

C. a. Coke b. Coal tar c. Kerosene

D. a. Coke b. Coal c. Coal tar

Answer:

A. a. Coal tar b. Coal c. Diesel

Explanation:

Coal Tar is a thick black or dark brown colored liquid obtained from coal. Coal Tar consists of hydrocarbons and free carbon extracted from coal using a process of destructive distillation. So, X is coal tar.

Earlier coal was used to produce steam to run steam engine trains. Air flows are allowed to burn coal hotter, then the hot coal turns water to steam and helps in the locomotive steam engine to run. So, Y is coal.

Deisel is used to run heavy vehicles such as buses, trucks, tractors, etc. because diesel burns at slow speed and produces a higher torque that can move heavy automobiles. So, Z is deisel.

Hence, the correct option is A.


Related Questions

Give two examples of solutions that you might find or prepare in a kitchen.

Answers

Explanation:

solid liquid

solid gas

liquid solid

Photosynthesis produces (4 points)

carbon dioxide and energy
carbon dioxide and oxygen
glucose and oxygen
glucose and carbon dioxide

(I'm pretty positive it's C, but correct me if I'm wrong)

Answers

Answer:

Glucose and oxygen is produced during photosyntheis

Explanation:

Carbon dioxide and water are required for photosyntheis producing oxygen and glucose

Answer:

C.Glucose and oxygen

Why does diamond not conduct electricity

Answers

Answer: no free electrons

Explanation: Diamond is very hard due to the strong covalent bonds and rigid tetrahedral 3d arrangement. It does not conduct electricity, as there are no electrons free to move and carry charge through the structure.

It does not conduct electricity, as there are no electrons free to move and carry charge

Pls help me with this will mark brainliest

Answers

Answer:

Pulmonary circulation moves blood between the heart and the lungs. The oxygenated blood then flows back to the heart. Systemic circulation moves blood between the heart and the rest of the body. It sends oxygenated blood out to cells and returns deoxygenated blood to the heart

Explanation:

How does the mass and height of an object affect the gravitational potential energy?

Answers

Answer: The higher up an object an is the greater it’s gravitational potential energy. This is because a tree has more mass, so it needs to be given more gravitational potential energy to reach the same height. So a change in gravitational potential energy also depends on the mass of the object that is changing height

Explanation:

The gravitational potential energy (P.E) depends on the mass of the body and the height at which it travels, the two quantities will therefore dictate the work done on the object which is eventually the same as  magnitude of the gravitational potential energy P.E.

It is assumed that gravitational pull acts toward the earth surface. The more the object move upward the more the work is done on the object to pull it down.

This work done is equal to the gravitational potential energy P.E which can be expressed as:

P.E = mgh

Where

m = mass of the body

g = gravitational field strength

h = height

We can have different masses of object at different heights, but gravitational field strength will always remain constant on earth.

Since the gravitational potential energy P.E depend on the mass of the body and the height at which it travels, the two quantities will therefore dictate the work done on the object which is eventually the same as  magnitude of the gravitational potential energy P.E.

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You have nitrogen gas (N2) at a pressure of 0.5 atm, a volume of 25000 mL, and a temperature of 300 K, how many grams of nitrogen are present?

Answers

Answer:

About 7.109g

Explanation:

25000mL is the same as 25 liters.

[tex]PV=nRT \\\\0.5 (25)=n (0.0821) (300) \\\\n\approx 0.508[/tex]

Multiplying this by the molar mass of nitrogen, you get about 7.109 grams of nitrogen. Hope this helps!

4. Which of these terms describes the process of acid rain wearing away limestone?

Acryptic erosion

B.chemical weathering

C.cryptobiotic weathering

D.chemical erosion

Answers

Answer:

B. Chemical weathering

Explanation:

Erosion is the process whereby the soil and rocks are washed away by wind, water, ice or gravity.

Weathering is the process of weakening and breaking down of rocks and minerals either by non-living (abiotic) or living (biotic) factors or by both, such as temperature changes, plants and animals, acids, salts and water, etc.

From the above definitions, it can be seen that acid wearing away limestone is a rock weathering process by a non-living agent, an acid.

Option A is wrong because the process is weathering

Option B is correct because an acid is a chemical and the process involved is weathering

Option C is wrong because an acid is non-living

Option D is wrong because the process involved is weathering

C2H5OH(l)+CH3COOH(l) → CH3COOC2H5(l)+H2O(l) If the yield of ethyl ethanoate obtained when 20.00 g of ethanol is reacted with excess ethanoic acid is 30.27 g, calculate the percentage yield

Answers

Answer:

The percentage yield is 79.12%

Explanation:

The first thing we need to calculate here is the theoretical yield of ethyl ethanoate that can be obtained from 20g of ethanol.

Since the mole ratio is 1:1, then this is quite straightforward.

What we need to obtain at first here is the number of theoretical moles of ethanol reacting.

That would be mass of ethanol/molar mass of ethanol

Molar mass of ethanol is 46g/mol

Thus the number of moles is 20/46 = 0.4348 mole

Like it is indicated earlier, since the number of moles are equal from the balanced equation, it also means that 0.4348 mole of ethylethanoate is produced

Now, we need to know the mass of ethyl ethanoate produced

The mass can be calculated by multiplying the number of moles by the molar mass

The molar mass of ethyl ethanoate is 88g/mol

So the mass of it produced = 0.4348 * 88 = 38.2624 or let’s just say 38.26

Thus, the percentage yield will be;

Actual yield/Theoretical yield * 100%

From the question, our actual yield is 30.27g while our calculated theoretical yield is 38.26g

= 30.27/38.26 * 100% = 79.12%

Which substances are products of a fermentation reaction?

1.water and carbon dioxide
2.alcohol and carbon dioxide
3.soap and glycerol
4.ester and water

Answers

Answer:

2.alcohol and carbon dioxide

Explanation:

Fermentation is a metabolic process which is used to produce chemical changes in various organic substances. This process is used in many fields including biochemistry, where it is defined as the "extraction of energy from carbohydrates in the absence of oxygen". The main substances produced from fermentation reaction are alcohol, carbon dioxide and lactic acid.

What is the name of Al2(CO3)3 ?

Answers

Answer: Aluminum Carbonate

Explanation:

Answer:

Aluminum carbonate.

Explanation:

It is an aluminum salt form of carbonic acid.

When KCl dissolves in water

Answers

Answer:

They form K₂O (Potassium oxide) and HCl (Hydrochloric acid). This is because K and H are positively charged and O and Cl are negatively charged and cations only bond with anions.

Please look at the photo and identify what’s in it!

Answers

Answer:

Explanation:

A battery

Answer:

Ac motor is in this images

Consider the intermediate equations: 3 equations.

C(s) + O2(g) --> CO2(g) Delta H1 = -393.5 kJ

2CO(g) + O2(g) --> 2CO2(g) Delta H2 = -566.0 kJ

2H2O(g) --> 2H2(g) + O2(g) Delta H3 = 483.6 kJ

With the overall reaction:

C(s) + H2O(g) --> CO(g) + H2(g) Delta Hrxn = ?

QUESTION 1:

What must be done to calculate the enthalpy of reaction?

The first must be halved.

The first must be reversed.

The second must be halved.

The second must be reversed.

The third must be halved.

The third must be reversed.

QUESTION 2:

What is the overall enthalpy of reaction?

Delta Hrxn = ____ kJ

Answers

Answer:

C. The second equation must be halved

D. The second equation must be reversed

E. The third equation must be halved.

Delta Hrxn= 131.3 kJ

Explanation:

The correct answer is -582 KJ.

What is the enthalpy of reaction?

Enthalpy is the heat content of a system.The enthalpy change of a reaction is roughly equivalent to the amount of energy lost or gained during the reaction.A reaction is favored if the enthalpy of the system decreases over the reaction.

What is the overall enthalpy of the reaction?

Equal to the sum of the standard enthalpies of the intermediate reaction steps is called overall enthalpy

Learn more about enthalpy below,

https://brainly.com/question/27207707

#SPJ2

How will you test for the gas which is liberated when hcl reacts with an active metal ?

Answers

When HCl reacts with a metal, hydrogen gas will be evolved. To test this gas, insert a burning splinter into the outlet of gas, the flame will be extinguished with a pop sound. This will confirm the gas is hydrogen.

In the lab, a student adds 4.5 g of sodium chloride (NaCl) to 100.0 g of water. Calculate the molality of the solution.

Answers

Answer:

0.77mol/Kg.

Explanation:

The following data were obtained from the question:

Mass of NaCl = 4.5g

Mass of water = 100g.

Molality =...?

Next, we shall determine the number of mole in 4.5g of NaCl. This can be obtained as follow:

Mass of NaCl = 4g.

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

Number of mole NaCl =..?

Mole = Mass /Molar Mass

Number of mole of NaCl = 4.5/58.5

Number of mole of NaCl = 0.077 mole.

Next, we shall convert 100g of water to kilograms. This is illustrated below:

1000g = 1kg

Therefore, 100g = 100/1000 = 0.1Kg.

Finally, we can determine the molality of the solution as follow:

Molality is simply defined as the mole of solute per unit kilogram of solvent (water). Mathematically, it is represented as:

Molarity = mole of solute / kg of solvent

Mole of solute, NaCl = 0.077 mole

Kg of solvent = 0.1kg

Molality = 0.077mol/0.1kg

Molality = 0.77mol/Kg

The molarity of the solution is 0.77mol/Kg.

Calculation of the molarity of the solution:

Since

Mass of NaCl = 4.5g

Mass of water = 100g.

Here,

Mass of NaCl = 4g.

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

Now

Mole = Mass /Molar Mass

= 4.5/58.5

= 0.077 mole.

Now

1000g = 1kg

So,

100g = 100/1000 = 0.1Kg.

Now

Molarity = mole of solute / kg of solvent

Mole of solute, NaCl = 0.077 mole

Kg of solvent = 0.1kg

So,

Molality = 0.077mol/0.1kg

= 0.77mol/Kg

Learn more about sodium here: https://brainly.com/question/14248836

ANSWER IT CORRECTLY PLEASE!!
The Osmotic pressure of blood is 7.65 ATM at 310 k. An aqueous solution of glucose is isotonic with blood has the percentage by volume

a.5.41%
b.3.54%
c.4.53%
d.53.4%​

Answers

Answer:

Explanation:

Pv = n RT

P =7.65, T= 310K, for glucose n = moles= weight/molar mass= weight/180, R is gas constant

7.65* V =W/180 *0.0821 * 310

w/v= 7.65*180/0.0821*310 = 1377/25.45 = 54.10 =5.4%

The pressure exerted by 0.002 moles of a gas in a 500 mL container at 25oC is:

Answers

Answer:

0.1715 atm

Explanation:

We use the Ideal gas equation to calculate this

Mathematically;

PV = nRT

rearranging, we have

P = nRT/V

from the question, we have

n = 0.002 moles

R = 0.082

T = 250 = 250 + 273 = 523 K

V = 500 ml = 500/1000 = 0.5 L

Plugging the values we have;

P = (0.002 * 0.082 * 523)/0.5

P = 0.1715 atm

1

Net ionic equations remove spectator ions and shows only the chemical species that are involved in the chemical reaction. Write the net ionic equation for the following acid base reaction.


Molecular Equation: 2 HCl (aq) + Mg(OH)2 (aq) → MgCl2 (aq) + 2 H2O (l)


Complete Ionic: 2 H+ (aq) + 2 Cl– (aq) + Mg2+ (aq) + 2 OH– (aq) → Mg2+ (aq) + 2 Cl– (aq) + 2 H2O (l)


Net Ionic Equation: ______________________________________________________

Answers

Answer:

The reaction of an acid and a base is called a neutralization reaction. ... However, in the reaction between HCl(aq) and Mg(OH) 2(aq), additional molecules of HCl and ... First, we will write the chemical equation with the formulas of the reactants ... The chloride ions are the only spectator ions  I THINKS

Explanation:

Name the following 3 structural formulas correctly, in order from left to right

Answers

Answer:

1. Methyl propanoate.

2. Propanol.

3. 2–pentyne

Explanation:

1. The functional group in this case is ester. We name ester by naming the group after the functional group (–COO) then followed by the parent compound with the name ending with –oate.

The group after the functional is methyl i.e —CH3.

The parent compound has 3 carbon i.e propane. The functional group replaces the –e in propane with –oate.

Therefore, the name of the compound is:

Methyl propanoate.

2. In this case the functional group is

–OH i.e alcohol.

The compound has 3 carbon i.e propane. The functional group replaces the –e in propane with –ol.

Therefore, the name of the compound is:

Propanol.

3. The triple bond represents the functional group in this case i.e alkyne. We'll give the triple bond the lowest low count by counting from the left. The triple bond is at carbon 2.

The compound has 5 carbon i.e pentyne since it contains triple.

The name of the compound is:

2–pentyne

What happens to the total mass of a substance undergoing a physical change

Answers

Answer: It stays the same

Explanation:

Answer: it stays the same (A)

Explanation:

did the test online got 100%

which accurately describes development?

Answers

Answer:

changing while growing

Explanation:

Answer: the answer is a

The diagram shows Niels Bohr’s model of an atom.


A small green circle labeled Proton is surrounded by 4 concentric circles. The space inside the first concentric circle is labeled N = 1; the space between the first and second circle is labeled N + = 2; between the second and third N = 3, and between the third and fourth N = 4. Oblong gray shapes labeled Electron appear on the second and third concentric circles.

What happens when the electron moves from the first energy level to the second energy level?
Energy is absorbed, and an emission line is produced.
Energy is released, and an emission line is produced.
Energy is absorbed by the atom.
Energy is lost from the atom.

Answers

Answer:

Energy is absorbed by the atom.

Explanation:

Tyler measured the force of his grip. Which is the most likely reading?

A.
190kg

B.
190N

C.
1 lb

D.
20,000 N

E.
5 seconds

F.
18mg

Answers

Answer:

190n

Explanation:

190 190 and because it is easy to understand if you didn't understand my answer ask any man

What can happen when tectonic plates move a few centimeters?

Answers

This is because earthquakes occur everywhere plates come into contact with each other. ... The movement of the plates over Earth's surface is termed plate tectonics. Plates move at a rate of a few centimeters a year, about the same rate fingernails grow.

Answer:

whole continents can move.

Does the conductivity increase or decrease?
O It increases at first, then decreases.
O It continuously decreases
O It continuously increases
O lt decreases at first, then increases

Answers

Answer:

It continuously decreases.

Explanation:

the thermal motion makes the electrons to collide and disturb the free flow. Thus, conductivity is decreased.

Elements that form ionic bonds generally have how many valence electrons?

Answers

Answer:

they should have a number that can completely transfer and fill the other atom

Explanation:

example:

sodium(2.8.1)and Chlorine(2.8.7)the sodium will give chlorine the 1 valence electrobo so they both become stable(2.8)±and(2.8.8)–

magnesium(2.8.2)and oxygen(2.6)same way as above to abtain mg(2.8)±²and oxygen(2.8)–²

What is a chemical solution and what are the names of its components?

Answers

Answer:

A chemical solution is defined as a homogeneous mixture of two or more substances. There are two components of chemical solution that include solute and solvent.

Solute is the component that get dissolved in another substance and solvent is the substance that dissolve solute.

For example:  carbon dioxide in water. Where carbon-dioxide is solute and water is solvent.

Which group in the periodic table contains the three elements with the highest
electrical conductivities?
OA) Group 8
B) Group 12
C) Group 11
D) Group 7

Answers

Answer:

Group 12

Explanation:

Group 12 is also called a transition metal group. This group in the periodic table lies in between the groups or tables. These metals are classified as the transition metal in the table.

These metals are found from the group number 3 to 12. In the periodic table, These transition elements are ductile and malleable. These metal conduct heat and electricity.

These elements are generally called dense and less to react to the alkaline metal. Iron, copper-silver, gold is the most important transition metal.

Answer:

Group 11

Explanation:

Pf

PLSSS HELPPP MEEE WITH THIS QUESTIONNNNN NO GUESSING PLSSSS
Which process is shown in the plant cell below?

A= cell growth
B= cell reproduction
C= metamorphosis
D= photosynthesis

Answers

Answer:

B

Explanation:

Well, the cells are going through mitosis, which means that when the divide, they are going to be identical sister cells. Anyways, they are

Why are prefixes not used in naming ionic compounds?
A. Two ions can combine in only one combination.
B. The number of ions is not fixed in a compound.
C. A roman numeral is used instead of a prefix
D. A subscript follows each name instead of a prefix.

Answers

Answer:

A.

Explanation: thats what i got right on the quiz lol

Prefixes are not used in naming ionic compounds because two ions can combine in only one combination.

It is common in organic chemistry and with a few other molecular species, to name the compound using a prefix such as di, tri, tetra etc to indicate the positions of moieties in the molecule. This is important because there could be several possible combinations of atoms in a molecule.

In the case of ionic compounds, the combining ions can only have one possible arrangement.

Hence, the reason why prefixes are not used in naming ionic compounds is because two ions can combine in only one combination.

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The function f(x) is shown in the graph above The function g(x) = -2x - 5 compare the slopes A. The slope of f(x) is undefined and the slope of g(x) is negativeB. the slope of f(x) is the same as the slope of g(x)C. The slope of f(x) is less than the slope of g(x) D. The slope of f(x) is greater than the slope of g(x) Who takes charge of the preparations for the wedding feast Romeo and Juliet Really in need of help :( please ! Given the information you now know, what is the effect of hyperventilation on blood pH?pH? During hyperventilation, the rapid in the blood CO2CO2 concentration shifts the equilibrium to the which the concentration of H+,H+, thereby the blood pH. I NEED HELP PLEASE I have been on this question for a hour HELP ME FOR BRANETEST PLS i need help pls, asap pls !! HELP PLEASE !! NEED HELP ASAPPP !! Will give brainliest !!!1. what is the measure of angle B? (image included below)2. What is the value of x? (image included below) A right triangle has a base equal to 13 inches and a height equal to 18 inches. Find the area of the triangle. Type anumerical answer in the space provided. Do not include units or spaces in your answers, What is the total energy required to break all the bonds in 1 mol propanol,C3H8O? 7th grade math I need some help PLEASE HELP the inverse of the function graphed below is a function True or false How can health literacy help people become more productive?A. By reducing the amount of time they spend dealing with illnessesB. By allowing them to act impulsively without negativeconsequencesC. By decreasing their need to spend time on health-promotingbehaviorsD. By ensuring that they never engage in risk behaviors Looking at a book to find out if it contains information that you need isSelect oneo a. skimmingO b. close readingC scanning Which of the following was a result of the Chinese Exclusion Act in 1882? It took back citizenship rights of Chinese born in America. It prohibited immigration by Chinese laborers. It banned the speaking of the Chinese language in America. It blocked Chinese immigrants from settling in cities. What is the primary difference between a hypothesis and a theory? A computer technician charges a flat rate for home visits plus $ 55 per hour. The technician bills $190 for a 2-hour home visit to install a new hard drive. The equation y 190 = 55(x 2) gives the total amount y the technician charges for x hours of work.What is the equation in slope-intercept form?y = 55x + 190y = 55x + 80y = 190x + 55y = 2x + 55 2 ways to make your computer work faster ( please help asap ) What is the equation of the line perpendicular to y = 2/3x+1that passes through the point (12, -6)? Can someone please help!!