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ANSWER:

COPPER, TIN, IRON, MERCURY

ANSWER:

Alnico is the ALLOY which is used for MAKING magnet . ✔️☑️❤️❤️❤️

We can move our hand in the air easily than a SOLID block because molecules of air are very very loosely PACKED but molecules in a solid block is very tightly packed.

A karate EXPERT breaks a solid block with an angle with practise.

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Explanation:

1 LACTIC acid - curd

2 acetic acid- vinegar

3 FORMIC acid / methanoic acid - ant sting, BEE sting

4 oxalic acid- TOMATOES/ SPINACH

So FIRST the elements that exist in 16 the group and 2nd period is oxygen and the elements that exist in 13th group and 3RD period is aluminium

REACTION ARE AS FOLLOWS

Al +O2——> AL2O3

When aluminium reacts with oxygen it form aluminium oxide

And aluminium has 3 valence electron and oxygen has 2 valence electron

CUSO4 (AQ) + Zn (S) = CU (S) + ZNSO4 (aq) is an example of metal DISPLACEMENT reaction.

Explanation:

DOUBLE LAYERS are FORMED this is the truth

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Answer:

1.8 to 3.7

Explanation:

PH LEVEL of TAMARIND can be 1.8 to 3.7. MEAN is 2.8

Answer:

CARBON tetrachloride has no reaction with water.

Suppose a water molecule is going to react with the carbon tetrachloride. The reaction would have to START by the water molecule's oxygen attaching itself to the carbon atom VIA the oxygen's lone pair. A chlorine atom would GET pushed off the carbon in the process.

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Answer:

SULPHURIC ACID is a DIBASIC acid.

S + O2 → SO2

2SO2 + O2 → 2SO3

SO3 + H2O → H2SO4

ANSWER:

sooorrryyy i DONT nnoooo

Answer:

EXPLANATION:

Degrees of unsaturation is equal to 2, or half the number of HYDROGENS the MOLECULE needs to be classified as saturated. Hence, the DoB formula divides by 2. The formula subtracts the number of X's because a halogen (X) replaces a hydrogen in a compound

The formula for degree of unsaturation is:

where NI is the number of atoms with valence vi.[2]

That is, an atom that has a valence of x contributes a total of x − 2 to the degree of unsaturation. The result is then HALVED and increased by 1.

Answer:

the different type of elections are

Explanation:    

General elections

General elections are always held the first Tuesday, after the first Monday, in November.

In a general election, Pennsylvanians vote for federal, STATE, and local officials, including:

U.S. senators and U.S. representatives to Congress

PENNSYLVANIA governor, lieutenant governor, general assembly, attorney general, AUDITOR general, state treasurer

County and city officials (only elected in odd-numbered years)

Judges and magisterial district judges (only elected in odd-numbered years)

In odd-numbered years, like 2021, these November elections are also called municipal elections because there are no federal or state office on the ballot.

Every four years, the General Election is also a presidential election.

Primary elections

UPDATE 3/27/2020: In response to the COVID-19 emergency, Pennsylvania’s 2020 primary election has been rescheduled for June 2, 2020. Upcoming election-related deadlines have been updated.

Primary elections in Pennsylvania are held on the third Tuesday of May in most years.

In presidential years, the primary election is held on the fourth Tuesday of April.

In a primary election, each political party selects its candidates to run for office during the general election. The candidates who get the highest number of votes in the primary election go on to run in the general election . Voters also vote for their party’s officers during a primary election.

In Pennsylvania, you can only vote for the candidates in the same political party you have named in your voter registration. For example, if you registered to vote as a MEMBER of the Republican Party then you can vote in the Republican primary, but not the Democratic primary.

All voters can vote on:

constitutional amendments,

ballot questions, and

any special election contests held at the same TIME as a primary election.

Special elections

Pennsylvania holds special elections when someone in office can no longer serve. This may happen when someone resigns, dies, or gets removed from office. Voters must select someone to replace that person.

Special elections may be held:

during a general election

during a primary election

on a different day designated by the elections office

The county or counties running the special election must advertise the date and locations for the special election, as well as the candidates running for office.

Everyone who lives in the district the candidates will represent can vote in the special election.

Presidential elections and the Electoral College

In presidential elections, each political party holds a national convention where they choose their nominee for president. The results of the primary election determine how votes from Pennsylvania are cast at the convention.

The nominees from each party run against each other in the general election in November.

The president is officially elected by the Electoral College, and not the popular vote. But the popular vote – including your vote – helps decide which candidate receives Pennsylvania's electoral votes.

the DISTANCE between SUCCESSIVE crests of a wave, especially POINTS in a SOUND wave or ELECTROMAGNETIC wave.

Answer:

because it can be CHANGED into DIFFERENT forms by physical and CHEMICAL REACTIONS

ANSWER:

When LEAD nitrate is heated, it BREAKS down into lead monoxide, nitrogen dioxide, and oxygen. 2Pb(NO3)2→2PbO+4NO2+O2.

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ANSWER:

NO2

Explanation:

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Hey Mate Here is ur ANSWER :-

➡The KEY difference between inert pair effect and SHIELDING effect is that inert pair effect is the ability of a pair of electrons in the outermost electron shell to remain unchanged in post-transition METAL compounds, whereas shielding effect is the reduction of the attraction force between electrons and atomic nucleus in an atom.

➡Inert pair effect and shielding effect are two different phenomena discussed in CHEMISTRY. Both these terms describe the attraction force between electrons and the atomic nucleus.

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ANSWER:

BYE gjbkhirsubddusjfsfjzjgxnvvxnvxgnxgmcmxgkdgkdkggdkggdgkjgsffsfjsfjsjfdjstsuutsfusggkxgkkgkhkhxgxgkxkgxgckggkxxgkgkxbgkxhfhhkfhkfhxkgxvmvvxbmccbjfjjlhfhfhdgdgdkgxgxgjxjgxgkxjgxkgxkgxgkxkhxkhxgkxfsjggzjjgckvcmvdgkgdkdkgdgkdgkdkhdhkkhxgdkgdhgddgdgkdgkkgdkhdihkkhdhkdhkdkhfkhhkxggkdgkdgkdgkkggkgkdkgdgdgkdgkdhkdhddgkxkgdgkdgkxkgxgxxbmgsjgsfjgkdkhhfhlhkhhdhkdkdhdhkdgkdhkhdgksggksgkdgkxggxhkxhkdhkdkhksfjsgfkhdhkckhhxkgdkgzvnzv XV kgdgkdhfhlgljgjljlgjlfhlfkhfhkdhkdhkhjkhdhdhldhkdhdh.dhdfh

Explanation:

gdidgdihflhchclhfkhxhkgdgjzfjxkggxh

ANSWER:

PLEASE i ALSO NEED this EXPLANATION

ANSWER:

only REPULSIVE I am THINK it is HELP for U

Answer:

No , BOLING water is not a chemical change rather it is a PHYSICAL change . As we know that in chemical change new SUBSTANCES are formed here no new substance is formed and it is also a reversable . So , Boiling water is a physical change.

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ANSWER:

what are EVEN TRYING to SAY?????????????????

Answer:

sure .. ..............The elementary particles of the Standard Model are:

Six "FLAVORS" of quarks: up, down, strange, charm, bottom, and top;

Six TYPES of leptons: ELECTRON, electron NEUTRINO, muon, muon neutrino, tau, tau neutrino;

ANSWER:

your answer is CORRECTLY RIGHT

D block ELEMENTS have a general ELECTRONIC configuration of (n-1)d 1-10ns 1-2. These elements can find stability in half-FILLED orbitals and COMPLETELY filled d orbitals.❤

ANSWER:

EXPLANATION:

SODIUM ETHYL XANTHATE

Answer:

Therefore, for 250ML of 2M NaOH, 20 GM of NaOH needs to be added to WATER.

Answer:

Atoms are constructed of two types of elementary particles: ELECTRONS and QUARKS. Electrons OCCUPY a space that surrounds an atom's nucleus. Each ELECTRON has an electrical charge of -1. Quarks make up protons and neutrons, which, in turn, make up an atom's nucleus.

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Answer:

DDT is USE as a insecticide ...

but it is harmful also.....

BECOZ..it does not GET digested ....

CAUSE health problems ....that's why it banned in many countries ...

but it can be easily available in India ...

I hope it will HELP u.......

ANSWER:

d) ε = 6.626×10-27 J CORRECT INFORMATION

ANSWER:

dear friend you have GIVEN INSUFFICIENT DATA

ANSWER:

TRUE.

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Answer:

direct current cannot be used as it changes the COMPOSITION of solution

Explanation:

ALTERNATING current can be used to SOLVE this PROBLEM.

ANSWER:

PLEASE SAW the ATTACHED FILE

Answer:

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Explanation:

CO2 extinguishers are ideal for places with a lot of electrical equipment such as offices or server rooms because they are SAFE to use on fires involving electrical apparatus. CARBON dioxide extinguishers do not leave any residue, unlike a foam extinguisher. They can also be used on Class B fires, those involving FLAMMABLE liquids such paraffin or petrol. CO2 extinguishers work by smothering the fire and cutting off the SUPPLY of air.

Carbon Dioxide Extinguishers (CO2) have a black label.

ANSWER:

S allow 2 electrons

p allow 6 electrons

d allows 10 electrons

f has 14 electrons

+1 CHEMISTRY IS VERY COMPLICATED.....

Answer:

Your answer is 1.)1.78×10^8c/g...

.

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@SimranRoy27.✌️

★ TEMPORARY hardness of water is DUE to the presence of

(A) MAGNESIUM bicarbonate ✅

(B) Calcium bicarbonate

(C) sodium bicarbonate

(D) Calcium SULPHATE

ANSWER:

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Explanation:

The VALUE of the mole is equal to the number of atoms in exactly 12 grams of PURE carbon-12. 12.00 g C-12 = 1 MOL C-12 atoms = 6.022 × 1023 atoms • The number of particles in 1 mole is called Avogadro's Number (6.0221421 x 1023).

Answer:A phase transition occurs when a material changes phase (liquid -> gas, gas -> solid, etc.). When TALKING about materials the TERM "Bulk" generally REFERS to a volume. So PUTTING the terms together, it would seem that a "bulk phase transition" would be when an ENTIRE material changes phase at once.

Explanation:

ANSWER:

NICE question I didn't understand 1 1 3 5 4 3

gas has more negligegable intermoluculer FORCE of ATTRACTION between the gas PARTICLES

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Answer:

   IDEAL SOLUTION

• It obeys Raoult's law over the entire RANGE of concentration.
• Total VAPOUR pressure of solution is the sum of vapour pressure of individual COMPONENTS.

   NON IDEAL SOLUTION

• It does not obeys Raoult's law

• Total vapour pressure of solution is not EQUAL to the sum of vapour pressure of individual components.

ANSWER:

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Explanation:

The temperature of a gas is a measure of the AVERAGE translational kinetic energy of the MOLECULES. In a hot gas, the molecules move faster than in a COLD gas; the mass remains the same, but the kinetic energy, and hence the temperature, is greater because of the increased velocity of the molecules.

ANSWER:

I am sorry I am busy so PLEASE add in what's app and then I tell you

Given:

• Initial pressure(p1) = 1.70 atm.

• Initial volume(v1)= 4.25 L.

• Final pressure(p2) = 2.40 atm.

• Temperature is constant.

To find:

The final volume of the gas(V2).

SOLUTION:

Initial pressure(p1) = 1.70 atm.

Initial volume(v1)= 4.25 L.

Final pressure(p2) = 2.40 atm.

Temperature is constant.

Final volume(v2) = ?

From the FORMULA we get that,

p1v1 = p2v2 [At constant temperature.]

⇒ (1.70×4.25) = (2.40×v2)

⇒ (2.40×v2) = (1.70×4.25)

⇒ (2.40×v2) = 7.225

⇒ v2 = (7.225÷2.40)

⇒ v2 = 2.89 L

∴ The final volume of the gas will be 2.89 L.

Answer:

             The final volume of the gas will be 2.89 L.

Answer:

yes ELEMENTS are CONSIST of mainly FOUR types

metals

non metals

metalloids

noble gas

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ANSWER:

GASEOUS STATE .

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Answer:

i hope this help u

****************

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Explanation:

We can seperate the mixture of ammonium chloride through sublimation PROCESS. The process by which the change of gaseous state directly to solid state without GOING through liquid state, and vice versa.

Sublimation is the method of SEPARATION used to separate a mixture of SALT and ammonium chloride