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ANSWER:

SO4 is SULPHATE and ZINC CARBONATE

It forms sodium hydroxide.

explanation ; Sodium oxide reacts exothermically with COLD water to produce sodium hydroxide solution.  Reaction with acids: As a strong BASE, sodium oxide ALSO reacts with acids. For EXAMPLE, it reacts with dilute hydrochloric acid to produce sodium chloride solution.

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Explanation:

when the HEAT is absorbed by the CHEMICAL REACTION then it is ENDOTHERMIC

Answer:

tincture of IODINE is a medicine used in the affected area the solute is iodine and SOLVENT is ALCOHOL

Answer:

because these REACTIONS evolve CO2 which EXTINGUISHES a CANDLE when BROUGHT near the mouth of testtube

Answer:

Now, in KO2, LET oxidation NUMBER of oxygen be x. THEREFORE, 1+2x=0 as K=+1 and KO2 is a NEUTRAL molecule. The oxidation number of oxygen in KO2 is -1/2.Apr

Explanation:

ANSWER:

DIFFUSION......

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Answer:

The main DIFFERENCE between ADDITION and CONDENSATION polymerization is that in addition polymerization the POLYMERS are formed by the addition of monomers with no by-products while in condensation polymerization polymers are formed due to the condensation of two different monomers resulting in the formation of SMALL .

ANSWER: Rate of reaction increase when TEMPRATURE is DECREASED and VICE VERSA in an exothermic reaction

Explanation:

The ELECTRICAL conductivity of acetic ACID is less in comparison to the electrical conductivity of dilute sulphuric acid at a GIVEN CONCENTRATION

ANSWER:

true SOLUTION because they do not SUSPEND PARTICLES when light is passed through it

Element Electrons Electronic Configuration

Hydrogen (H) 1 1s1

Helium (He) 2 1S2

Lithium (Li) 3 1s2 2s1

Beryllium (Be) 4 1s2 2s2

Boron (B) 5 1s2 2s2 2p1

Carbon (C) 6 1s2 2s2 2p2

Nitrogen (N) 7 1s2 2s2 2p3

Oxygen (O) 8 1s2 2s2 2p4

Fluorine (F) 9 1s2 2s2 2p5

Neon (Ne) 10 1s2 2s2 2p6

Sodium (Na) 11 1s2 2s2 2p6 3s1

Magnesium (Mg) 12 1s2 2s2 2p6 3s2

Aluminum (Al) 13 1s2 2s2 2p6 3s23p1

Silicon (Si) 14 1s2 2s2 2p6 3s23p2

Phosphorous (P) 15 1s2 2s2 2p6 3s23p3

Sulfur (S) 16 1s2 2s2 2p6 3s23p4

Chlorine (Cl) 17 1s2 2s2 2p6 3s23p5

Argon (Ar) 18 1s2 2s2 2p6 3s23p6

Potassium (K) 19 1s2 2s2 2p6 3s23p6 4s1

When rain falls to the ground, the water does not stop moving. ... Water not used by plants moves DEEPER into the ground. The water moves downward through empty spaces or cracks in the soil, SAND, or rocks until it reaches a LAYER of rock through which water cannot EASILY move.

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Because HCL and H2SO4 are man MADE or artificial but Vinegar,Lactic Acid, Citric Acid are obtained from nature. That's why, they are CALLED organic acid.

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MINERAL Acid are HIGHLY corrosive but Acids LIKE lactic acid, literic acids are LESS corrosive.

Explanation:

In the example USING a lithium atom, Z EQUALS 3 (the atomic NUMBER of lithium) and S equals 1.7. By changing the variables in the formula to the correct values for the example, it BECOMES Zeff = 3 - 1.7. The value of Zeff (and thus the effective nuclear charge of the 2s electron in a lithium atom) is 1.3.

Answer:

37.03 m

Explanation:

Mole FRACTION of ethanol in aq. solution= 0.4 (given)

n₁= moles of ethanol

n₂= moles of water

0.4= n₁/n₁+n₂

4/10= n₁/n₁+n₂

n₁=4 and n₂= 10-4= 6

Molality (m)= moles of solute/1 kg of solvent

Solvent= 6 moles*18 gm/mol

            = 108 GMS

            = 0.108 kg

m= 4/.108

  = 37.03 m

ANSWER:

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ANSWER:

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Answer:

a) 2H2O→4H+O2+4e−

Q=4F

=4×96500Cmol−1

=38600cmol−1

(b) ZN is oxidized and AG2O is REDUCED to Ag

E0cell=E0Ag+/Ag−E0zn2+/zn

=[0.344−(−0.76)V]V

=1.104V

AG0=−nFE0cell

=−2×96500cmol−1×1.10V

=−213×105Jmol−1

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HERE IS YOUR ANSWER:-

When calcium CARBONATE reacts with dil.HCL it produces CaCl2 and CO2 and H2O.

CaCO3 + 2HCL ----> CaCl2 + CO2 + H2O

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Explanation:

SALICYLALDEHYDE FORMS intramolecular hydrogen bonding and its PARA isomer forms intermolecular hydrogen bonding .....

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Answer:

Yes.

EXPLANATION:

The change in physical CONDITIONS can alter the rate of change of reaction. It EITHER INCREASES or DECREASES the rate as per the case may be.

YES CONDUCTIVITY DECREASES

EXPLANATION:

because water is a SOURCE of ENERGY E and it's very important for the survival of living organisms plants to do photosynthesis and animals for their daily requirements

Answer:

Displacement reaction: Chemical reaction in which one reactant is being displaced by another reactant to obtain the ION .There is only single EXCHANGE of ion taking place.

Example:

Zn+2HCl=ZnCl2+H2

In this zinc REPLACES hydrogen and forms zinc chloride

Double Displacement reaction: Chemical reaction in which two reactants exchanges each other ions to form NEW compounds.

Example: AgNO3+NaCl=AgCl+NANO3

In this exchange of ions is taking place between Ag &Na.

Na replaces Ag to form NaNO3 and Ag takes place of Na and forms NaCl.

Answer:

physical EDUCATION certificate for the BACK and FORTH between the first one is STRICTLY prohibited by federal express their and I have been working with

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ANSWER:

silver is the full FORM Ag in CHEMISTRY

it's the element

Answer:

REDUCING AGENT is no one

EXPLANATION:

because all are balanced

ACCORDING to ATOMS

1) An acid - from sulphur dioxide gas

Ans:

2) An ALKALI - from a basic oxide - sodium oxide

Ans: To obtain alkali from DISSOLVE basic oxide in WATER.

chemical EQUATION are BALANCED in ORDER to SATISFY the law of CONSERVATION of matter which state that in closed system matter is neither created nor destroyed.

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ANSWER:

melting POINT is a point in which SOLIDS melts to GET CONVERTED into liquid state

We know that volumes of various solutions are not additive in nature.

Therefore, we can infer that 100 of Hydrogen Sulphate and 400 of water do not actually make 500 of the RESULTING SOLUTION but instead create a solution which has a lesser amount than that.

Yet, we have 150 G of acid 1M + 400g of water, which is equivalent to 550 g of material as well as a final DENSITY of 1.25 . Then;

Initially, we had;

The amount derived is that of .

Therefore;

Ans) (d) 0.227 M

Answer:

POPULATION DENSITY- It is the measurement of population per unit area or or unit volume.this is frequently applied on humans.

                                                 (OR)

In simple terms we can SAY that the no. of people living in an area per kilometer square.

Explanation:

The two major population density can be different in years but according to recent serve the high population density zones are of Southeast Asia and some other that also falls in this category are Cairo and Lagos of AFRICA.

whereas an impure SUBSTANCE have two or more than two particle! A pure element or compound CONTAINS only one substance, with no other substances mixed in. Impure materials MAY be MIXTURES of elements, mixtures of compounds, or mixtures of elements and compounds.

Answer:

Read below:

Explanation:

THERMAL HEAT capacity is the amount of heat energy REQUIRED to raise the temperature of the whole body by 1°C.

Whereas:

Specific heat capacity of a body is the amount of heat energy required to raise the temperature of 1 GRAM of the substance through 1°C.

It will form an ionic bond.

Or a GermaniumQuadflouride  bond  

An ionic bond is formed between a METAL and a non metal,because it involves complete transfer of electrons.

In this case,Germamium is a metal while Florine is a non metal.

The metallic element gives ATOMS for the non metallic element.

When a metal LOSES its atom,it becomes an ion.

Fluorine will lose its atom and become a fluorine ion.

Germamium and fluorine IONS will now have equal but  differently charged ions,and since DIFFERENT charges attract,they will attract each other to form an ionic bond.

Answer:

LEARN PERIODIC table from INTERNET you can FIND it or U just tell me I will send u pic

ANSWER:

classical isosters are MOLECULES or iron with the SIMILAR shape and often electronic properties.

what in CASE of PLZ POST FULL QUESTION

Explanation:

There is a broad spectrum of mineral phosphate chemistries; but in arid to semiarid SOILS the predominant FORMS are the CALCIUM phosphates. Calcium phosphates are soluble to varying degrees in the presence of the WIDE array of organic ACIDS produced by microorganisms.

1) A direct combination reaction between phosphorus and a NEUTRAL gas.

Ans:

2)A soluble salt of lead FORMED from an INSOLUBLE base by double decomposition - neutralisation.

Ans:

3) A thermal decomposition reaction of a salt which results in the formation of nitrogen gas

Ans:

4) A synthesis reaction between a metal & a non-metal resulting in formation of an insoluble salt of iron

Ans:

The adsorption of gases increases with increasing PRESSURE and decreases with the decrease in press. On the other HAND it decreases with increasing TEMPERATURE and increases with increase in temperature.

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Answer:

Determine the MOLECULAR formula of a compound. In the PREVIOUS SECTION, we discussed the RELATIONSHIP between the BULK mass of a

ANSWER:

because they are not in a ORBIT but are just in the NUCLEUS in any DIRECTION

Answer:

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Answer:

EXPLANATION:

Dimitri MENDELEEV

In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical ELEMENTS by atomic mass. He PREDICTED the discovery of other elements, and left spaces open in his periodic table for them.

EXPLANATION:

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why are aryl halides LESS reactive towards nucleophilic substitution reactions than alkyl halides ?

Aryl halides are more stable and less reactive DUE to resonance where the LONE pair of electrons are in conjugation with a pie BOND whereas in alkyl halides the carbon halogen bond is a sigma bond MAKING aryl halides more stable than alkyl halides.

• So the bond energy between C-Cl increases so reactivity decrease.

ANSWER:

Exhaustable Resource:

The resources which could get completely over or eatened up are CALLED exhaustable resources.

Inexhaustible Recources:

The resource which WOULD NEVER end untill the end of universe are CALL inexhaustible resouces.

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