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ANSWER:

EXPLANATION:The SI SYSTEM is the system of measurement to define the physical quantities . SI Unit of MASS is KILOGRAM

metallurgy is a domains if materials science and engineering that studies the PHYSICAL and chemal behavior of mattaluray elements there inter mattallac compoundse and there mixture which are called alloys mattaluray is used to separate matal for there ore mattaluray is also the TECHNOLOGY of METAL the way in which science is appiend to the PRODUCTION of matal and the engineering of matal COMPOENTS its use in product the consumers and manufacturer

ANSWER:

what is this............

METALLURGY is a domain of MATERIALS science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are CALLED ALLOYS.

Metallurgy is used to separate metals from their ore.

ANSWER:

EXPLANATION:

NO2 GAS or NACL

➡️Schulze are known as HARDY Schulze law. It can be DEFINED as: Greater is the valency of the oppositely charged ion of the electrolyte being added, the faster is the COAGULATION.

➡️The idea behind this is the ATTRACTIVE ELECTROSTATIC forces between ions of opposite charges.

ANSWER:

the subshell associated with n=4 is 4 only. the no of electron with-1/2 is 16 only .

Answer: a. Propene to n-propyl alcohol

By the Hydroboration Oxidation Method:-

Ch₃-Ch=Ch₂ + 1. Bh₃/ 2. H₂O₂ , NAOH ⇒ Ch₃-Ch₂-Ch₂-OH

B.  Propene to isopropyl alcohol

By Markonikov's RULE :-

Ch₃-Ch=Ch₂ + H-OH/H⁺ ⇒  Ch₃-Ch-Ch₃

                                                      |

                                                     OH

ANSWER:

false

Explanation:

Inflammable is SUBSTANCE which can spontaneously catch FIRE and also it can SUSTAIN the fire so answer is false

Explanation:

48 . b

49.b

I HOPE this MAY HELP you

ANSWER:

where is your ELEMENT...

.

....

ANSWER:

Quanching MEANS decrising of fluorescence INTENSITY of a given substance

Answer:

Explanation:

Case1:   When  putting clothes for DRYING we spread them .

In this case we use the fact of surface area. We know that when surface area is increased the rate of EVAPORATION increases. This is because when we spread them, more PARTICLES get into contact with the air thus, leading to more evaporation and thus more cooling. This inturn dries the clothes faster.

Case2: Water coolers are not effecting on a  rainy day.

This is because during RAIN the atmosphere is very humid due to the presence of large amount of water vapour. This inturn decreases the rate of evaporation. This is why we feel hot. But using water coolers will increase the amount of water vapour in the air, thus decreases evaporation.

This is because humidity decreases evaporation MAKING us feel hot.

HOPE THIS HELPS YOU..

Answer:

pure SUBSTANCE is not seprated from the matter

2.constant chemical and physical properties

3.the pure subsatnce is in pure FORM not an IMPURITIES

Answer:

Explanation:

It is true because once if SUGAR is dissolved in MILK it BECOMES soluble in it and the sugar BREAKS down due to which it mixes and cannot be a PHYSICAL change

ANSWER:

here is your answer

This is the answer GIVEN by Scarlet111

D orbital in scandium is not HALF filled.

d orbital can HOLD 10 electrons.d has only 1 ELECTRON so it is not half filled.

ANSWER:

Cl2+SO2+2H20------>H2SO4+2HCl

METALS are SONOROUS or shiny WHEREAS compounds are not.

Ionic compounds are electrolytes whereas metals can conduct electricity.

Ionic compounds are compounds whereas metals are elements.

Hope this will help you.. :)

ANSWER:

Explanation:

1 MOLE of any substance has Avogadro's No. amount of particles.

Hi,

Answer:

Final pressure in each flask is 0.572 atm.

Explanation:

Given Data:

Two flasks of equal VOLUME are at initial TEMPERATURE 27°C, initial pressure 0.5 atm and contains 0.35 moles of H₂.

To find: final pressure in each flask

Let the two flasks be “a” & “b”. Also, let flask “a” be immersed in a bath at temperature, Ta = 127°C = 127 + 273.15 = 400.15 K and flask “b” remains the same as initial temperature i.e., temperature, Tb = 27°C + 273.15 = 300.15 K . No. of moles in flask a and b be “na” & “nb” respectively.

Using Ideal Gas Law for the combined system INITIALLY, we have

PV = nRT

Or, 0.5 * 2V = 0.35 * R * 300.15 …[∵ both the flasks have the same volume]

Or, V = 105.052 R ….. (i)

The final pressure in both the flask Pa and Pb will be same i.e., Pa = Pb = P and also Va = Vb = V.  

For flask a :

Pa * Va = na * R * Ta

Or, P * V = na * R * Ta

Or, P * 105.052R = na * R * 400.15 ….. [ value of V from (i)]

Or, na = 0.262P ….. (ii)

For flask b:

Pb * Vb = nb * R * Tb

Or, nb = (Pb Vb) / (R Tb)

Or, nb = (P * 105.052 R) / (R * 300.15 )

Or, nb = 0.349P ….. (iii)

We know,  

TOTAL no.of moles initially = na + nb

Substituting values of na and nb from (ii) & (iii)

Or, 0.35 = 0.262P + 0.349P

Or, 0.35 = 0.611P

Or, P = 0.35/0.611 = 0.572 atm

Hence, the final pressure P = Pa = Pb = 0.572 atm.

Hope this is helpful!!!!

Explanation:

Hey mate

Here's UR ans

They R called

Trans uranic elements

Follow me.. N MARK as brainlest dear

ANSWER:

they are GOOD CONDUCTOR of HEAT

Answer:

EXPLANATION:

ch2 which is ATTACHED to DOUBLE BOND

EXPLANATION:

Hey mate

Here's ur ANS

CH5COOH

=12+5+12+32+1

=62g/mol

Follow me n MARK as BRAINLEST dear

EXPLANATION:

^_^^_^^_^^_^^_^14 it was very EASY

ANSWER: in GIVEN PICTURES

Answer:

CH3CH(ch3)ch3 isobutane

Explanation:

HOMOLOGUE MEANS individual member of HOMOLOGOUS series

Answer:

Explanation:

melting point inversely proportional to  covalent character

cc directly proportional to ANION size

which MEANS melting point is inversely for anion size for high melting point

decreasing order is 1234

ANSWER:

H2O, CACO3, NACL ETC....

ANSWER:

the STRUCTURE of H2O and is CARBON DIOXIDE

definition of IUPAC international union of PURE and applied chemists these standards body that AMONG other things makes recommendation regarding the NAME of newly DISCOVERED element and ESTABLISH other chemistry related standard (such as the labelling of groups on the periodic table)

Answer:

CQO in is used as a catalyst U hehe

Answer:

he was a French chemist who GAVE the LAW of CONSTANT proportions

EXPLANATION:

HIPPARCHUS.............

Answer:

Option C 25 DEGREES and 12 atm

Explanation:

Explanation:

In chemistry, valence bond (VB) theory is one of the two BASIC theories, along with molecular orbital (MO) theory, that were DEVELOPED to use the methods of quantum MECHANICS to explain chemical bonding. It focuses on how the atomic orbitals of the dissociated atoms combine to give individual chemical bonds when a molecule is formed. In CONTRAST, molecular orbital theory has orbitals that cover the WHOLE molecule.[1]

Answer:

Emission means which GETS out

Absorption means which gets ABSORBED in any thing

mark me BRAINLIEST PLZZZZ

EXPLANATION:

I think ....

let TAKE @¹ - 300MM

@² - 600MM

(600-200)

400

so 400 ANSWER

Answer:

Rasayan ton hai hi hamari is dharti PAR par lekin yeh Rasayan dharti ko ganda pradushit aur ki aur andar hi andar se KHARAB KAR rahe hai ab is pavitra dharti ko log dushit karenge toh hum bachenge bato mai yeh aap se POOCH RAHA hai

Answer:

CHEMICAL CHANGE

1)It cannot be observed.

2)Substance undergo change in chemical composition.

3)It cannot be measure.

4)Forms new substances.

Ex:Coal BURN in air,etc.

PHYSICAL CHANGES

1)It can be observed.

2)Substance does not undergo chemical change.

3)It can be observed.

4)Do not form new substance.

Ex:MELTING point,Boiling point,etc.

HELLO DEAR ❤️❤️❤️

The WORD STATISTICS is derived from the Latin word “status” or the Italian word “statista,” and meaning of these words is “political state” or "government." Shakespeare used the word statist is his drama Hamlet (1602). In the past, statistics was used by rulers. The application of statistics was very limited, but rulers and KINGS needed information about land, agriculture, commerce, populations of their states to assess their military potential, their wealth, taxation and other aspects of government.

Gottfried Achenwall used the word statistik at a German university in 1749 to mean the political science of different countries. In 1771 W. Hooper (an Englishman) used the word statistics in his translation of Elements of Universal Erudition WRITTEN by Baron B.F Bieford. In his book, statistics was defined as the science that teaches us the political arrangement of all the modern states of the known WORLD. There is a big gap between the old statistics and modern statistics, but old statistics is also used as a part of present-day statistics.

thanks

Explanation:

In relation to the FIRST definition when the ELECTRIC field of the nucleus is REDUCED inside a SINGLE atom due to shielding, the electric fields of ions in conducting solids are further reduced by the cloud of electrons.

here is your ANSWER

HOPE so it MAY help you

PLEASE mark me as the BRAINLIEST answer:-)

An acid and and base NEUTRALIZATION INVOLVES an AQUEOUS acid solution and an aqueous base solution COMBINING in a double replacement reaction to form a salt and water. Since both partners in the REACTANTS are changing to new partners in the products this is a double replacement reaction.

Explanation:

SIGNUP

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Chemistry > Surface Chemistry > Adsorption Isotherm

Surface Chemistry

Adsorption Isotherm

Now that you know what adsorption is, how do we measure or study it? The process of adsorption is usually plotted and studied using a graph. This is CALLED adsorption isotherm. Different scientists have developed different kinds of adsorption isotherms. Let’s go ahead and learn about this concept in detail.

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Definition

Adsorption Isotherm is a curve that expresses the variation in the amount of gas adsorbed by the adsorbent with PRESSURE at constant temperature.

Freundlich Adsorption Isotherm

In 1909, German scientist Freundlich PROVIDED an empirical relationship between the amount of gas adsorbed by a UNIT mass of solid adsorbent and pressure at a particular temperature. It is expressed using the following equation –

x/m = k.P1/n (n > 1)

where ‘x’ is the mass of the gas adsorbed on mass ‘m’ of the adsorbent at pressure ‘P’. ‘k’ and ‘n’ are constants that depend on the nature of the adsorbent and the gas at a particular temperature.

The mass of the gas adsorbed per gram of the adsorbent is plotted against pressure in the form of a curve to show the relationship. Here, at a fixed pressure, PHYSICAL adsorption decreases with increase in temperature. The curves reach saturation at high pressure. Now, if you take the log of the above equation –

log x/m = log k + 1/n log P

To test the validity of Freundlich isotherm, we can plot log x/m on the y-axis and log P on the x-axis. If the plot shows a straight line, then the Freundlich isotherm is valid, otherwise, it is not. The slope of the straight line gives the value of 1/n, while the intercept on the y-axis gives the value of log k.

adsorption isotherm

Freundlich Isotherm

Limitations of Freundlich Isotherm

Freundlich isotherm only approximately explains the behaviour of adsorption. The value of 1/n can be between 0 and 1, therefore the equation holds good only over a limited range of pressure.

When 1/n = 0, x/m is constant, the adsorption is independent of pressure.

When 1/n =1, x/m = k P, i.e. x/m ∝ P, adsorption is directly proportional to pressure.

Experimental results support both of the above mentioned conditions. At high pressure, the experimental isotherms always seem to approach saturation. Freundlich isotherm does not explain this observation and therefore, fails at high pressure.

The Freundlich isotherm was followed by two other isotherms – Langmuir adsorption isotherm and BET adsorption isotherm. Langmuir isotherm assumed that adsorption is monolayer in nature whereas BET isotherm assumed that it is multi-layer.

Solved Examples for You

Questions: State whether the following statements are True or False.

Adsorption isotherm is a curve that expresses the variation in the amount of gas adsorbed by the adsorbent with the temperature at constant pressure.

Freundlich isotherm fails at high pressure.

If the plot of log x/m on the y-axis and log P on the x-axis is a straight line, then Freundlich isotherm is valid.

Freundlich isotherm explains the behaviour of adsorption accurately.

In the equation – x/m = k.P1/n (n > 1), ‘k’ and ‘n’ are constants that depend on the nature of the adsorbent and the gas at a particular temperature.

ANSWER:

it is NITRATE gas

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PLS pls pls pls pls pls pls MARK as BRAINLIEST

Hey MATE!!

here's your answer...

»The main PRODUCTS obtained after burning PETROLEUM are :

• Carbon di oxide,
• Oxides of nitrogen,
• Oxides of sulphur.

ANSWER:

C5H12O2..................

ANSWER:no

Explanation:SINCE it is TOTALLY PERFECT in all ASPECTS.