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ANSWER:

the ELEMENT is Calcium

Explanation:

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ANSWER:

All metals have some amount of resistivity to ELECTRICAL currents, which is why they REQUIRE a power source to push the current through. ... Copper has low resistivity, and THEREFORE is an excellent conductor. Copper is also less oxidative than other metals.

Answer:

3

Explanation:

Question:-

How many metals are used in duralumin. What is the ALLOY used for?

ANSWER:-

There are 4 types of metals used in Duralumin.

1) Aluminium

2) Copper

3) Magnesium

4) Manganese

Duralumin is used for making air craft PARTS as it very light , boat machinery.etc...,

Explanation:

BRASS, BRONZE and SOLDER the alloys which are made with the combination of different metals. Brass is an alloy of copper and zinc. Bronze is a metal alloy consisting primarily of copper, usually with tin as the MAIN additive, but sometimes with other elements such as phosphorus, manganese, aluminum, or silicon

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ANSWER:

METALS are CONDUCTORS and NON metals are insulators

Explanation:

this is this

Answer:

A CHLORINE MOLECULE is very fatal to the ozone MOLECULES. A single chlorine atom can destroy 100,000 moelcules of ozone.

copper metal when exposed to AIR turns green in colour due to CORROSION in copper vessel is exposed during rainy season the metal REACT with gases and moisture and atmospheric gases to form a mixture of copper carbonate and copper hydroxide . this is a green colour to the surface of copper metal.

this green colour LAYER is called patina. this act as protective layer not as corrosive layer.

prevention:

it is prevented when Cooper metal comes in contact with oxygen it for a green layer known as patina which help copper from further corrosion.

★ This is because Al readily reacts with oxygen of AIR and form really stable aluminum oxide LAYER on it. This layer is so stable that it does not allow any further REACTION of aluminum. Hence it is safe to transport nitric ACID in an aluminum container.

★ A thermite reaction is basically iron oxide (rust) reacting with aluminum to produce molten iron. The products are aluminium oxide, elemental iron, and a large amount of heat. The reactants are commonly or thermite mixture is aluminum powder and iron oxide (rust) powder. When the mixture is heated, it starts reacting as the aluminum is more reactive than the iron and aluminium FORMS STRONGER and stable bonds with oxygen than iron.

Uses-

1.The reaction is used for thermite welding, often used to join rail tracks. 2.Thermites have extremely high TEMPERATURE and ALSO been used in metal refining, demolition of ammunitions, and in incendiary weapons.

3.Some thermite-like mixtures are used in fireworks.

4.A thermite reaction is used to purify the ores of some metals called as thermite PROCESS.

Explanation:

a mixture of finely powdered aluminium and iron OXIDE that produces a very high TEMPERATURE on combustion, used in welding and for INCENDIARY bombs.

it's know as THERMITE

ANSWER:

KCL IS AN IONIC COMPOUND

Explanation:

ANSWER:

A DROP of water.

Explanation:

you will GET your answer

Answer:

Use PV = NRT. SOLVING for V, we have V = nRT/P; n and R are constants here.

V₁ = 60 dm³.

P₁ = 1.05 × 10⁵ Nmˉ².

T₁ = 600 °C = 873 K.

V₂ = x dm³.

P₂ = 1.01 × 10⁵ Nmˉ².

T₂ = 273 K.

Explanation:

Answer:

amount of co2 =8.8 G

Explanation:

according to the equation ,

for 100 g of caco3⇒ 73 g of HCL is needed

here we have 20 g of caco3 and 20 g of hcl,so the limiting reagent is caco3...so product formed will be according to the amount of caco3,

thus for 100 g of caco3⇒ 44g of co2 will be produced

that is for 1 g of caco3⇒44/100 g of co2

         so 20 g of caco3⇒ 44/100 × 20 of co2 formed

                                          =8.8 g

ANSWER:

mis the wavelength of the beam

Explanation:

ACCORDING to de Broglie's equation

λ= h/m×v

where,

λ=wavelength

h=plank '=6.626×10^−34 kgm2/s

m=mass

Mass of helium ATOM =4amu.

Convert amu into KG as follows

4amu× 1g/6.022×10^23amu

=0.664×10 ^−23g

=6.64×10^−27 kg

Putting the values in the above equation as follows.

6.626×10^−34 kgm^2/s /6.64×10^−27 kg×2×10^4m/s

=0.498×10^−7m

Thus, 0.498×10^−7mis the wavelength of the beam

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ANSWER:

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Explanation:

LOOK at the above PIC

Explanation:

The EGG - shells are MADE up of calcium carbonate. When it reacts with HCl it LIBERATES CO2 gas which turns lime WATER milky. CACO3 + 2HCl → CaCl2 + H2O + CO2

➡ SYMPTOMS OF COMMON COLD :

★ NASAL congestion and discharge , SORE throat , hoarseness , cough , HEADACHE and TIREDNESS .

★ These symptoms may lasts till the immune reaction develops i.e. production of antibodies and killer cells against virus which usually tales 3-7 days .

Causative Agent - RHINO Virus

Affected Organs - Nose and upper respiratory tract but not lungs .

MCL3 => metal/mermaid MUST be TRIVALENT ....

so its SULPHATE will be M2S3

Answer:

ETHYL alcohol or ETHANOL is not a MIXTURE but is a compound

Explanation:

here the formula is C2H5OH

it is an alcohol with an ethyl GROUP on it

EXPLANATION:

In a solid the constituent particle are very closely packed and the FORCES of attaction among these particles are so strong that the constituent particles in solids have more or LESS fixed positions. They can only OSCILLATE about their mean positions. Consequently soids are rigid and have a definite shape and VOLUME .

ANSWER:

gloves: CONCENTRATED sulphuric acid solution can hurt the human skin

goggles: FUMES can hurt your eyes

mask: not NECESARY just extra precaution

ANSWER:

assuming a SPHERICAL is SECOND Bohr ORBITS

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Answer:

E = n H C / L

E = Energy = Power * Time = 2000 J

h = Plank 's constant = 6.67 * 10^-34 J s

c = speed of light = 3 * 10^8 m/s

L = wavelength = 66 * 10^-8 m

n = no. of PHOTONS

After putting all these values ,

n = 6.6 * 10^21

I hope it helps .

Answer:

When interparticle space increases,  interparticle force decreases and the PARTICLES become more free. we can the take EXAMPLE of vaporization, i.e. when LIQUID changes to gas interparticle distance increases.

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Answer:

When SOLUTION is filtered, the impurities are SEPARATED out .

It DEPENDS on the type of FILTRATION that which type of impurities WOULD be separated .

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Answer:

2CU (NO3) + ZN =  Zn(NO3)2 + 2Cu

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ANSWER:

OPTION B is the CORRECT answer

Answer:

Measurement of Temperature on the Ideal Gas Scale

In this experiment a constant volume gas thermometer is used to measure temperature using the Ideal Gas scale.  On this scale temperature has been defined as proportional to the product of PV for a fixed mass of gas.  If the volume of the gas is kept constant, then the temperature is proportional to the pressure of the gas.



and so



If T1 and P1 are ASSIGNED the values of the temperature and pressure of the gas at the triple point of water (where T = 273.16 K), then the formula becomes



where P is the pressure of the gas at temperature T, and Ptp is the pressure of the gas at the triple point of water.





Measurement of Temperature on the Ideal Gas Scale – Page 2

Apparatus

PC, e-ProLab interface and software, pressure sensor, Celsius thermometer, large beaker, round-bottomed or conical flask, rubber stopper, glass and plastic TUBING, and a hotplate.

Diagram







Measurement of Temperature on the Ideal Gas Scale – Page 3

Method

Set up the apparatus as shown in the diagram. Add some ice to the beaker and allow the ice-water system to reach thermal equilibrium, stirring the mixture continuously until this is achieved.  Click  here for a calibrated HiScope file.  Record the pressure of the gas.  This is the pressure at the ice-point which is very close to the triple point.  Note and use this value for Ptp. Use the hotplate to heat the water in the beaker, and record the pressure of the gas for every 10 degree RISE in temperature as indicated on the Celsius thermometer.  Click  here for an Excel file to INPUT your results.  Record the Celsius temperature reading for each measurement for comparison purposes.  Calculate the corresponding temperatures on the Ideal Gas scale using the following formula.



ANSWER:

fe+s-fes.

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ANSWER:

EXPLANATION:

SORRY the QUESTION is not COMPLETE

ANSWER:

a REACTION REQUIRED is PHOTOCHEMICAL

ANSWER:

HAHA I'm not SURE what to do

Explanation:

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H2​S⇌H++HS−     Ka1​

HS−⇌H++S2−      Ka2​

H2​S⇌2H++S2−     Ka3

​Ka1​=[H2​S]/[HS−][H+]​

Ka2​=[HS−]/[H+][S2−]​

Ka3​=Ka1​.Ka2​...

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The GREAT amount of ENERGY is required to break the triple bond between non-polar elements. 4. Therefore as the triple bond is required more energy and the elements are non-polar the bond is STABLE and therefore it has the HIGHEST bond energy

Answer:

WAVE length ANGSTROM falls of LIGHT

ANSWER:

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Explanation:

N forms ccp lattice. No of atoms in ccp lattice are 4. Thus, no of N atoms are 4

M OCCUPIES one third of tetrahedral VOIDS. SINCE no of tetrahedral voids are twice no of atoms,

M =(1/3)*2*4 = 8/3

M : N = 8/3 : 4 = 8 : 12 = 2 : 3

The formula for the compound is M2N3

ANSWER:

................ydsd......

Answer: An inflorescence is a GROUP or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified PART of the SHOOT of seed plants where flowers are formed. ... The STALK of each single FLOWER is called a pedicel

Explanation:

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An ELEMENT is a SUBSTANCE whose ATOMS all have the same number of protons: another way of saying this is that all of a particular element's atoms have the same atomic number. Elements are chemically the SIMPLEST substances and hence cannot be broken down using chemical reactions.

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ANSWER:

CACL2

Ca2+ (G) + 2CL-(g) = CaCl2(s)

Answer:

The five basic TYPES of chemical REACTIONS are combination, decomposition, single-replacement, double-replacement, and combustion. ANALYZING the reactants and products of a given reaction will allow you to PLACE it into ONE of these categories.

Explanation:

there should be reaction not equation....

1 MOLE is equal to 1 moles NAOH, or 39.99711 GRAMS

ANSWER:

ANSWER

KLM

286

(a) Since, it has 6 valence electrons, it belongs to GROUP no. 16.

(b) It has 3 Valence shells, so it belongs to period no 3.

(C) The NUMBER of valence electron is 6.

(d) The valency of E is 2 because it requires 2 electrons to achieve its stability .

(e) It is a non-metal.

Explanation:

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Explanation The classic explanation of elemental SODIUM's VOLATILE reaction with WATER involves the simple reduction-oxidation chemistry of sodium and water: electrons flow from sodium metal into the surrounding water, forming sodium hydroxide and hydrogen gas. This is a very fast reaction that produces a LOT of heat

ANSWER: your ANS in the pic

Explanation:

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EXPLANATION:

METHOXY CYCLOHEXANE

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