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ANSWER:

Where are the OPTIONS?¿????¿??????

ANSWER:

isme find KYA KARNA h PURA question bhejo bhai

Since the chapter is MOSTLY theory and there are NUMERICALS towards the end I'll recommend studying the formula of 'Formula Unit Mass' , 'Mole Concept'.

There is one important formula you will have to USE various times.

No. of MOLES = Given mass/ Molar mass

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Explanation:

Nanotechnology ("nanotech") is manipulation of matter on an ATOMIC, molecular, and supramolecular scale. ... It is therefore COMMON to see the plural form "nanotechnologies" as WELL as "nanoscale technologies" to refer to the BROAD range of research and applications whose common trait is size.

ANSWER:

they are known as alkaline EARTH METALS. Since they are metals they are used in manufacturing their respective ALLOYS or compounds.

We know that P1V1 = P2V2

On putting the value of V1 = V and V2 = 4V , we get

P1xV = P2x4V

Therefore, P1 = 4P2

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ANSWER:

concentrated SOLUTION MEANS in the solution of a given acid the amount or concentration of WATER is more than the acid .

so in conc sulphuric acid the amount of water is more than that of the sulphuric acid.

just opposite of this is diluted solution of an acid

EXPLANATION:

nine ISOMERS

n-Heptane has nine isomers, all with DIFFERENT names and arrangements, but still containing seven carbon ATOMS and sixteen hydrogen atoms.

ANSWER:

it is the SLAKED LIME

CALCIUM HYDROXIDE

Answer:

Hey

Explanation:

Dry Ice is the common NAME for solid CARBON dioxide (CO2). It gets this name because it does not melt into a LIQUID when heated; instead, it changes directly into a gas (a process KNOWN as sublimation).

ANSWER:

EXPLANATION:

LIQUID

(a) 25°C, the PHYSICAL state of water is a liquid. (b) 0°C, the physical state of water can be either a SOLID or a liquid.

Answer:

Four steps for water CONSERVATION

Reduce outdoor watering.

Check for broken or CLOGGED sprinkler heads.

Fix leaks in all plumbing fixtures.

Install water-efficient DEVICES.

ANSWER:

an ELEMENT CONTAINS only ONE KIND of atom

Explanation:

ANSWER:

GO through GOOGLE................

EXPLANATION:

I think U should go to GOOGLE for ur perfect ans.

ANSWER:

Mendeleev's periodic table had a few drawbacks:

1)Isotopes of the same element which had similar chemical properties were placed in wrong positions

2)Hydrogen was a ambiguous element.

3)Anomalous Pair of elements:Argon with ATOMIC mass 39.9 preceded potassium with atomic mass 39.1.Similar was the case with cobalt (58.9)and nickel(58.6)

4)Grouping of chemically dissimilar elements . Eg: Copper and Platinum were placed in different places

5)Separation of chemically similar elements . Eg :GOLD and Platinum were placed in different places

6) There was no EMPHASIS on electronic configuration.

The Long Form of the modern periodic table is regarded better than mendeleev's periodic  table because it was able to OVERCOME most of the drawbacks. Yet it  still had two demerits:

1)Position of Lanthanides and Actinides

2)Position of hydrogen.

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Answer:

Magnetic seperation:

1)Not all metals are magnetic; gold, silver and aluminum are some EXAMPLES.

2)Hot products.

3)JAW or cone crushers

Decantation:

A COMMON example is decantation of oil and vinegar.Kerosene and WATER can also be seperate using decanatation.

Filtration:

Examples of gas filtration are common in everyday life.For instance, every TIME a vaccum cleaner runs, it passes a stream of dust-filled air through a filtering bag inside the machine.Solid particles are trapped within the bag, while clean air passes out through the machine.

ANSWER:

hwhhuhehduduisjehheudhjejdhvdhu

ANSWER:

WHERES the QUESTION me TION the HYDRATES

EXPLANATION:

hhhhhhfdsaaaaaaæ all WEEP)

ANSWER:

HII mate✌️,

Explanation:

The water which have more contains of magnesium(Mg), sodium(NA) and Calcium(Ca) is called hardwater. It is not good for drinking.

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ANSWER:

NaSo4+BaCl2=BaSo4+NaCl

methane DIFFUSE FASTER than SULPHURDIOXIDE 15 TIMES faster

Explanation:

Let's do the Lewis STRUCTURE for HBr, hydrobromic acid. On the periodic table, Hydrogen is in group 1, so it has 1 VALENCE electron, and BROMINE is in group 7, sometimes called 17, it has 7 valence electrons; for a total of 8 valence electrons. We DRAW our H, we draw our Br, and we have 8 valence electrons.

H - 1S¹

He - 1S²

Li - 2S¹

Be - 2S²

B - 2s² 2p¹

C - 2s²2p²

N - 2s² 2p³

O - 2s² 2p⁴

f - 2s² 2p5

Ne - 2s²2p6

Na -3s¹

Mg - 3s²

Al - 3s² 3p¹

si - 3s² 3p²

P - 3s² 3p³

S - 3s² 3p⁴

Cl -3s² 3p5

Ar- 3s² 3p6

K - 4s¹

Ca -4s²

Sc - 4s²3d¹

Ti -4s²3d²

V - 4s²3d³

Cr - 4s¹ 3d5

Mn - 4s²3d5

Fe - 4s²3d6

Co -4s²3d7

Ni -4s²3d8

Co -4s¹3d10

Zn --4s²3d10

ANSWER:

O2, i think

Explanation:

THANK YOU FOR DA BRAINLIEST YEAH I HAVENT GOTTEN ONE IN WEEKS LMAO>

EXPLANATION:

octa-methane.......

Answer

2 Swarts reaction

Explanation:

when METHYL chloride is treated with AgF

halide exchange takes PLACE , CHLORINE is replaced by fluorine and a WHITE ppt. of AgCl is formed .

for reaction see the picture ATTACHED to it .

I hope it will help you .

ANSWER:

SEARCH it on GOOGLE SORRY

ANSWER:

hshshsjsjshshshjsjsjshsbsbshshbshsudushsgsggsueuehdhdhdhdgysysysysysysggsgsys

Explanation:

gsgsysysususysyhshsgsgegehheieiehegeveghehehehehehhehehehehehheheh

Answer:

The basicity of an ACID is the amount of hydrogen IONS it can DONATE to a base or a base can accept when they REACT. The ACIDITY of a base is the amount of hydrogen ions it can accept, or the amount of hydroxide ions it can donate.

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Explanation:

Answer:

Hess's Law of CONSTANT Heat Summation (or just Hess's Law) states that regardless of the multiple stages or STEPS of a reaction, the total enthalpy change for the reaction is the SUM of all changes. This law is a MANIFESTATION that enthalpy is a state function.

DUE to COVALENT NATURE of COMPOUND

The complex ion COULD be

Cu(NH3)4^2+

i.e. tetraamminecopper(II) ion

Because...

29 - 2 + 8 = 35

Where

NH3 = 8

Cu = 29

2+ is SUBTRACTED while TAKING effective atomic number.

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Answer:

homo MEANS same structure but DIFFERENT functions it is also same ORIGIN..

Explanation:

..so by referring to That we can to know that homo will have same origin so exciting origin will be same....

Answer:

53.20%

EXPLANATION:

% composition of water =

(mass of water / molecular mass) X 100

mass of water in GIVEN compound is = 108

molecular mass of given SUBSTANCE is = 203

( atomic mass of H=1, O=16, Mg=24, Cl=35)

% of water = (108/203) X 100

= 53.20 %

Answer:

GREEN HOUSE gas it is monoxide . OXYGEN LITMUS to air

ANSWER:

There are three stepsinvolved in water treatment

1. PRIMARY treatment

2. secondary treatment

3 TERTIARY treatment

ANSWER:

H2O

EXPLANATION:

Answer:

the sex is a practical way which occurs between a MAN and woman

it cant EXPLAIN PRACTICALLY without MEETING

Answer:

global warming MAINLY happens because of TEMPERATURE and atmospherical IMBALANCE.

Explanation:

Alpha means EXCESS turn or active turn.. BETA and alpha both R STANDARD of measurments

Answer:

Indicators are the SUBSTANCES which tells us whether the GIVE solution is acidic or basic.

For OXALIC acid and sodium hydroxide acid we can USE universal indicators.

Other indicators are Natural,Man Made ETC..

Answer:

Given:

TWO chemicals =  and O

Number of moles of OXYGEN = 3

To find:

Number of moles of  in 3 moles of Oxygen

Calculation:

Step 1:

Calculation of the molar mass of given chemicals

Molar mass of  = 1(S) + 2(O) = 1 (32) + 2 (16) = 32+32 = 64g.

Molar mass of Oxygen = 16g

Step 2:

Calculation of 1 moles of the given substance

1 mole of substance = Molar mass of the substance.

∴ 1 mole of  = 64g

3 mole of oxygen = 16×3 = 48g

Step 3:

Calculation of number of moles of  with same mass of 3 moles of oxygen

64 g of   = 1 mole

∴ 48 g of  = x

On CROSS multiplication:

x × 64 = 1 × 48

x =

x =

x = 0.75 moles

Conclusion:

0.75 moles of   have same mass as 3 moles of oxygen.

Learn more about such concept

The number of moles of ammonia that have the same mass as that of 3 moles of CARBON dioxide is

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Verify the following:

a) 5 moles of carbon dioxide and 5 moles of water do not have same mass.

b) 240g of calcium and 240g of magnesium elements have a mole ratio 3:5

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Explanation:

EXPLANATION:

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Answer:

Hye♥♥

Here is the answer -

KAL(SO4)2.12H2O

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as the pipette ,the BURETTE should be RINSED with distilled water followed by the solution it is to be filled with to AVOID CONTAMINATION issues

Filling the burette this way is also useful it MEANS the space under the tap is also filled with liquid...

Answer:

पढाई भी बहुत अच्छी चल रही होगी !

तो दोस्तो आज जो हम आपको GK Trick बताने जा रहे है वो बहुत ही IMPORTANT है , आज हम आपको भारत के प्रधानमंत्रियों ( PRIME MINISTER of India ) को क्रम

ANSWER:

it MEANS you have did WELL