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EXPLANATION:

MAGNESIUM reacts with hot water to form magnesium hydroxide and hydrogen.

MgO(s) + H2O(L) → Mg(OH)2(aq)

EXPLANATION:

The UV-vis region of energy for the electromagnetic spectrum covers 1.5 - 6.2 EV which RELATES to a wavelength range of 800 - 200 nm.

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Answer:

According to MENDELEEV's Periodic Law, isotopes of an element must be given separate places in the periodic table because they have different atomic masses. It does not explain the electronic arrangement of ELEMENTS. Elements that are chemically similar such as Gold and PLATINUM have been placed in separate groups.

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the branch of SCIENCE concerned with the substances of which MATTER is COMPOSED, the investigation of their properties and reactions, and the use of such reactions to FORM new substances.

ANSWER:

NAME=TANISHA NEGI

CLASS=IX

SUBJECT=

ANSWER:

-4p^3+9p^2+8p

Explanation:

4p(3-p^2) + 9p^2 - 4p

12p-4p^3+9p^2-4p

-4p^3+9p^2+8p

ANSWER:

water purifier

EXPLANATION:

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Answer:

In ADIABATIC process, there is no exchange of HEAT thus q=0. So First LAW BECOMES ΔU=W.

(b) Isochoric process, as it is carried in closed VESSEL ΔV=0 thus W=0. So first law becomes ΔU=q.

ANSWER:

MAY be this is your answer

ANSWER:

তুমি আমার কাছে খুব বেশি হলে তো আর কিছু বলার নাই বা কেন জানি না কেন তা না করে পারলাম যে এই

Answer:

No. of MOLES of SOLUTE =2

Mass of SOLVENT =1 kg

Since it is an AQUEOUS solution, thus the solvent must be water.

Moles of solvent =

18

1000

=55.5 moles

Mole fraction of solute =

57.5

2

=0.0347

<STRONG>Answer:

YES it is difficult to walk during and YEAH STROM because it comes in very high speed and it is not POSSIBLE to walk on yeah strong

<STRONG>Answer:

Answer

HNO

3

+NaOH→NaNO

3

+H

2

O

Acid used : Nitric Acid -HNO

3

Base used: Sodium Hydroxide - NaOH

NH

4

Cl is FORMED from the reaction of NH

3

, a weak base, and HCL, a strong acid.

NH

3

+HCl→NH

4

Cl

Answer:

+3

Explanation:

It is the CORRECT answer HOPE it HELPS please mark brainliest

Answer:

Let's try to think about the general FORM of a word problem involving mixtures.

In general, we have the following scenario:

a merchant SELLS two kinds of products (COFFEE, sweets, etc).

we know the unit prices for both kinds of products and for the final mixture

p

1

US DOLLARS per pound for the first kind of product,

p

2

US dollars per pound for the second kind of product

p

m

US dollars per pound for the mixture

we know the total quantity formed by the mixture of the two products (

q

pounds)

we have to find out the quantities of each product needed to form the mixture

(here we have the VARIABLES:

x

denoting the quantity of the first kind of product and

y

denoting the quantity of the second kind of product)

Now, we have sufficient information to work out the equations.

First, we know that the sum of the two quantities is

q

pounds, which gives us the first equation:

x

+

y

=

q

Second, we know that the sale price is the product of quantity and unit price, which gives us the second equation:

p

1

x

+

p

2

y

=

p

m

⋅

q

Now, we have a system of two linear equations that can be easily solved by substitution.

Explanation:

A solution contains 20 grams of Ammonium CHLORIDE in 180 grams of water. Calculate the CONCENTRATION in terms of MASS by mass PERCENTAGE of the solution

ANSWER:

Let X the oxidation number of underlined atoms (Cl) in KCl_ . Let x the oxidation number of underlined atoms (Cl) in Cl2_ . Let x the oxidation number of underlined atoms (Cl) in Cl_O2 . HENCE the oxidation number of underlined atoms is +5,−1,0,+4 .

ANSWER:

H2 MEN's hrdrojon 02 men's OXYGEN

ANSWER:

phentole

hpe TIS is DA answer...

ANSWER:

the FRICTION is RESISTANCE

Answer:

THUS, oxygen MOLECULE has two bonds. i.e., one is bond and one p bond. The last two ELECTRONS in p2px∙ and p2py∙ ORBITALS will remain unpaired. Therefore, oxygen molecule has paramagnetic character due to the presence of two unpaired electrons.

Explanation:

1.A sieve, fine mesh strainer, or sift, is a device for SEPARATING wanted elements from unwanted material or for characterizing the particle size distribution of a SAMPLE, USING a screen such as a woven mesh or net or perforated sheet material. The word "sift" derives from "sieve"

2.Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.

3.The supernatant is the clear liquid that lies above the solid residue after centrifugation, precipitation, crystallization or settling. The liquid is normally free of precipitate and has a lower density. ... Supernatant is also known as supernate.

4.Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. The surrounding gas must not be saturated with the evaporating substance. When the molecules of the liquid collide, they transfer energy to each other BASED on how they collide with each other.

5.Centrifugation is a technique that helps to separate mixtures by applying centrifugal force. A centrifuge is a device, generally driven by an electric motor, that puts an object, e.g., a rotor, in a rotational movement around a fixed axis. ... Pelleting is the most common application for centrifuges

ANSWER:

1. T
2. F
3. F
4. T
5. F

HOPE it WELL HELP you

ANSWER:

The solution is considered acidic if the pH of the solution is less than 7; the solution is neutral if the pH is around 7; if the pH is greater than 7, the solution is CALLED basic. The abundance of hydrogen ions in an acidic solution, then, is greater than that of hydroxide ions.

itna masom face MAT kia karo yarr

sachi me me pighal raha HU ICE ke tarah

EXPLANATION:

here is the ANSWER of your QUESTION HOPE it's HELPFUL for you

ANSWER:

buddhadeb in the world of RATIONAL numbers in the world of the world of the

Explanation:

try to GET the question of the following is a good MORNING and I will be there by

ANSWER:

don't KNOW SRY Sry sry

Answer:

gtxiufr the morning and will not be in a good weekend so I U o

Explanation:

r ami to EXPLORE tried and tutorials and TIF

Answer: The (n+1) Rule, an empirical rule used to predict the multiplicity and, in conjunction with Pascal's triangle,

According to (n+l) rule: Orbital which has the least value of (n+l) will be filled first to the electrons.

EXAMPLE: 3s orbital will be filled first and then 3p orbital.

Orbital  n    I      (n+l)        

  3s      3     0   3+0=3

  3p      3      1   3+1=4

I hope this INFORMATION helps

Explanation:

Write a LETTER to your friend who stays at CHENNAI telling him or her which magazines and periodicals does your school subscribe to for your school library. Mention their TITLES, and at what time INTERVALS they are brought out.

Answer:

) Saturated Solution

A saturated solution is a solution that contains the maximum amount of solute that can be dissolved under the condition at which the solution exists.

Examples

Beverages are one of the most widely used and LOVED saturated solutions.

Soil present on the earth surface can also be called a saturated mixture which consists of nitrogen. Once the saturation point is reached, the EXCESS nitrogen is let out into the air in gas.

b) Pure Substance

Pure substances are made up of only one kind of PARTICLES and have a fixed or constant structure. An element is a pure substance as it cannot be broken down or transformed into a new substance even by using some physical or chemical means. Elements are mostly metals, non-metals or metalloids.

Examples

All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc.

Compounds such as water, salt or crystals, baking soda, amongst others, are also grouped as pure substances.

c) Colloids

Colloids are defined as a mixture where one of the substances is split into very minute particles dispersed throughout a second substance. The minute particles are known as colloidal particles. Colloids are heterogeneous mixtures in which solute particles’ size is intermediate between those in true solutions and those in suspensions and are big enough to scatter light.

Examples

Milk

Blood etc.

d) Suspension

A suspension is a heterogeneous mixture in which the small particles of a solid are spread throughout a LIQUID without dissolving in it. The naked eye can see the particles of a suspension. In this type of mixture, all the components are completely mixed, and all the particles can be seen under a microscope. A suspension is a heterogeneous mixture containing solid particles that are SUFFICIENTLY large for sedimentation.

Examples

Chalk -water mixture

Flour in water

Milk of Magnesia etc.

Answer:

(a) When an acid reacts with a metal CARBONATE, then a salt, carbon dioxide gas and water are produced.

Example: When DILUTE hydrochloric acid reacts with sodium carbonate, then sodium chloride, carbon dioxide gas and water are formed.

NA

Na 2

Na 2

Na 2 CO

Na 2 CO 3

Na 2 CO 3

Na 2 CO 3 (s)+2HCL(aq)→2NaCl(aq)+CO

Na 2 CO 3 (s)+2HCl(aq)→2NaCl(aq)+CO 2

Na 2 CO 3 (s)+2HCl(aq)→2NaCl(aq)+CO 2

Na 2 CO 3 (s)+2HCl(aq)→2NaCl(aq)+CO 2 (g)+H

Na 2 CO 3 (s)+2HCl(aq)→2NaCl(aq)+CO 2 (g)+H 2

Na 2 CO 3 (s)+2HCl(aq)→2NaCl(aq)+CO 2 (g)+H 2

Na 2 CO 3 (s)+2HCl(aq)→2NaCl(aq)+CO 2 (g)+H 2 O(I)

ANSWER:

CuO(s)+2HCl(AQ)→CuCl2(aq)+H2O(L)

ANSWER:

CARBOLIC ACID is the answer

ANSWER:

hello

Explanation:

characteristics of chemical change is :

. color change

. VOLUME change

.change in SMELL and taste

.the production of light

Answer:

H

2

SO

4

+2NaOH→Na

2

SO

4

+2H

2

O

Moles of NaOH required =

1000

2×84.5

=0.169

For 2 moles NaOH→1 MOLE H

2

SO

4

is USED

For 0.169 mole NaOH→0.0845 moles are used.

Mass of H

2

SO

4

→0.0845×98=8.281 gm (Theoretical)

Mass of H

2

SO

4

used in original reaction ⇒5×1.8=9 gm

∴ % purity =

9

8.281

×100=92.12 %

ANSWER:

The actual formula of first law of THERMODYNAMICS is

∆U=Q-W

where, ∆U=change in internal energy

Q=heat ADDED and

W=work done by the system.

ANSWER:

B. o NITRO PHENOL is the answer

Answer:

1dg2fj4un

Explanation:

etjeyk57hrk47o4umdhku

Answer:

284 V

Explanation:

V=IR

R= 70 OHM

I= 3.2 A

THEREFORE,

V=70*3.2

=7*10*3.2

=7*32

=280 V

HENCE THE VOLTAGE BETWEEN THE TWO POINTS ARE 280 VOLTS

the BRANCH of SCIENCE concerned with the substances of which matter is COMPOSED, the investigation of their properties and reactions, and the use of such reactions to FORM new substances.

The cobalt ION is in a +3 oxidation state and has an electronic CONFIGURATION of 3d6. Six pairs of electron one from each ammonia molecule occupy the six hybrid orbitals, hence the molecule is DIAMAGNETIC and OCTAHEDRAL in shape.

Answer:

NUE is equal to C UPON LAMDA .where

ANSWER:

The average kinetic ENERGY of a gas PARTICLE is directly proportional to the temperature. An INCREASE in temperature increases the speed in which the gas MOLECULES move. ... Lighter gas molecules move faster than heavier molecules

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Answer:

Given the FORMULA of iron (III) oxide.
(ii) Reaction between Al and iron (III) oxede.
(iii) Based on the above chemical reaction, PREDICT the type of reactions.
(iv) IDENTIFICATION of oxidizing and REDUCING agents.

Answer:

Epoxidation and HYDROXYLATION ... so formed with either sodium borohydride or zinc and ACETIC ACID. ... diol CLEAVAGE REACTION with periodic acid.

ANSWER:

The answer is (B) an ether

hope it HELPS!

ANSWER:

C5H10 PLZ LIKE and FOLLOW

ANSWER:

it is ALREADY balanced

Explanation:

CaCO3-> CAO + CO2