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ANSWER:

Explanation:

Empirical FORMULA weight=12+(2*1)+16=30

n=Molecular formula weight/Empirical formula weight=180/30=6

Molecular formula=n*Empirical formula=6*CH2O=C6H12O6,hope you UNDERSTOOD

It's not chemical but a SUGARY substance what which help pollen GRAINS to develop his pollen TUBE
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METALS ORES

SILVER (Ag) Argentite (Ag2S)

GOLD (AU) Calaverite

Aluminium (Al) Bauxite

Copper (Cu) CHALCOPYRITE (CuFeS2)

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In activity series silver is placed below the COPPER. hence copper is more reactive than silver.

The more reactive element can displace the less reactive element from its solution.
take two test TUBES in  test tube -1 take silver Sulphate solution(white in color) & in test tube-2  take copper Sulphate solution (blue in color). Add copper turnings to test tube -1 and add silver piece to test tube -2 KEEP the test tubes undisturbed for 15 minutes. After sometime observe the color changes in both test tubes. The color in test tube – 1 changed from white to blue and there is no color change in test tube-2.this indicates in test tube-1 copper displaces silver from its silver Sulphate solution forms copper Sulphate. And in test tube- 2 no displacement reaction takes place. Hence from this EXPERIMENT we are proving that copper is more reactive than silver.

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It is a GASEOUS STATE

A should have configuration 2,8,7
it's a non-metal
since a required 1 electron to GAIN NOBLE configuration and b should lose 1 e so they will form ionic bond
ab is the formula

I think it will be in liquid state.........B'cuz .......... boiling point of ACETONE is 56 degree Celsius........

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Electrons occupy shells CHARACTERISED by the principal quantum number.
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The lowest energy shell ( ) is the ground-state.
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If you have a ground state HYDROGEN ATOM, the the first EXCITATION energy is the distance to the lowest unoccupied orbital i.e. it is the lowest energy that can excite an ELECTRONIC transition.
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The intermolecular interactions are MUCH weaker than saturated molecules.
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As a result, the melting points are much LOWER for unsaturated fatty ACIDS.
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❤❤Quiz: If ROOM tempereature is 25° which of the following fatty acids is a solid or liquid at room tmeperature❤❤

When we MELT solid the IMPURITY have less boiling point so they MAKE vapour on the TEMPREATURE by which solid into LIQIUD

Egg shell is MADE of calcium carbonate. We KNOW that when calcium carbonate reacts with nitric ACID, it gives carbon dioxide, calcium NITRATE and water. Same reaction happens when nitric acid is poured over egg shell.

Answer:

Matter typically exists in one of three states: SOLID , liquid , or GAS . The state a given substance exhibits is also a physical property. Some substances EXIST as gases at room TEMPERATURE (oxygen and carbon dioxide), while others, like water and mercury metal, exist as LIQUIDS. Most metals exist as solids at room temperature. All substances can exist in any of these three states. In addition to existing in one of the three states, matter can also undergo a change of state. A change of state occurs when matter is converted from one state to another state for example when a liquid is converted to a gas or a solid is converted to a liquid.

we know that density of water is 1gm/ml.

molar vmass of water 18 GM/mole

number of moles in 1 gm =1/18=0.55 moles

18 gm CONTAINS 6.022×1023 molecules of H2O

no of MOLECULE in one gram water 6.022×1023/18=0.33×1023

1 h2o molecule =1/0.

The chemical formula of WASHING soda is Na2CO3.10H2O. Washing soda can be obtained by heating baking soda. On heating, baking soda gives sodium carbonate, CARBON dioxide and water. CONSEQUENTLY, the RECRYSTALLISATION of sodium carbonate gives washing soda. The chemical equations INVOLVED in the process are: Washing soda is used in glass, soap and paper industries.

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Home»FORUM»Organic Chemistry»organic

3. Which molecule has the largest dipole moment? 


a. HCl 


b. CCl4 


c. H2S 


d. CO2

4 years ago

Answers : (1)

The Dipole Moment is defined by the charge separated multiplied by the distance (separation) between the CHARGES. Hcl as the largest Ionic character, because as we move up the group, electro-negativity increases. 
These are the actual VALUES: 
HCl 1.08 
HBr 0.80 
HI 0.42

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The molar MASS of OXYGEN is 32g. Thus, there are 6.022 X 1023 molecules of O2 in 32g of O2. 

So

 32g of O2 = 6.022 X 1023 molecules of O2

 1g of O2 = (6.022 X 1023 / 32) molecules of O2  

 40g of O2 = (6.022 X 1023 X 40) / 32 molecules of O2  

 = 7.5275 X 1023 molecules of O2

Thus, there are 7.5275 X 1023molecules of O2 in 40g of O2. Now, the molar mass of carbon dioxide gas (CO2) is 44G. Thus, there are 6.022 X 1023 molecules of CO2 in 44g of CO2. So

 mass of 6.022 X 1023 molecules of CO2 = 44g 

 mass of 1 molecule of CO2 = 44 / (6.023 X 1023) g 

 So, mass of 7.5275 X 1023 molecules of CO2 = (44 X 7.5275 X 1023) / (6.022 X 1023) g of CO2

 = 55g of CO2

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0.00volt potential of HYDROGEN because it has tendency to LOOS and GAIN of electron EQUAL

2into NA that is AVOGADRO's NUMBER

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With more than eight million tonnes going into the oceans every year, it is estimated there will be more plastic than fish by 2050 and 99 per cent of all the seabirds on the planet will have consumed some. It is thought the sea now CONTAINS some 51 trillion microplastic particles – 500 TIMES more than stars in our galaxy.

It is found all over the planet, with 300 billion pieces in the once-pristine Arctic and a remote island in the Pacific, the uninhabited HENDERSON Island, one of the Pitcairns, believed to have the highest concentration of plastic pollution in the world.

Is it dangerous?


Plastic in the sea smells like food to fish, finds new study

Some plastic is toxic and it can disrupt hormones crucial for a healthy existence. Even when it is not dangerous itself – or not known to be – plastic acts like a magnet for a range of other POISONS and pollutants we have spilled into the natural world.

To sea turtles, plastic bags in the water can look like jellyfish, floating on the surface plastic can appear to be a tasty snack for a seagull, based on millennia of experience, and to baby perch it appears more appetising than the plankton they are supposed to eat.

Unsurprisingly, gulping down all this indigestible poison instead of food is bad for their health. So far, it is known that marine litter harms more than 600 species amid what some regard as the beginning of the sixth mass extinction of life on Earth.

empirical formula of the compound is CH2O, its molecular formula can be written as N(CH2O) = C(n)H(2n)O(n),It is given that 0.25 MOLES of the compound contains 1G of H i.e 0.25 mol -> 1g of H,This means (2n)(0.25) moles of H in the compound contains 1g of H i.e (2n)(0.25) -> 1g,(2n)(0.25) = 1,2n = 12 or n = 6,So the molecular formula of CH2O is C6H12O6

Because it is an electrolyte☺☺☺
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Explanation:

/, C7H6O2 (or C6H5COOH), is a colorless CRYSTALLINE solid and a SIMPLE aromatic carboxylic acid. The name is DERIVED from gum benzoin, which was for a long time its only known source. Benzoic acid occurs naturally in MANY plants and serves as an intermediate in the biosynthesis of many secondary metabolites.

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C) INCREASED by 45.5%.

These are the group 17 elements arranged in order as we move down the group. Thus the correct order of decreasing electronegativity will be

Cl

F

Br

I

The electronegativity decreases as we move down the group. But the electron gain enthalpy of Cl is more than that of F because of the small SIZE of F which LEADS to REPULSION in the electrons.

The first law is USUALLY formulated by saying that the change in the internal ENERGY of a CLOSED thermodynamicsystem is equal to the DIFFERENCE between the heat supplied to the system and the amount of WORK done by the system on its surroundings.

His paper attempts to provide a historical survey of structure of various types of hexaferrites. It provides information about synthesis, characterization, structural, magnetic and dielectric properties of Y-type hexagonal ferrites using various chemical routes. We have prepared a series of cobalt doped Sr 2 Cu 2-x Co x Fe 12 O 22 (x = 0.0 to 1.0) hexaferrites using a wet chemical co-precipitation technique. The prepared hexaferrite precursors were calcined at 950 ºC for 4 hours in a furnace and slowly cooled to room temperature. The CRYSTAL structure of Y-type hexaferrites is RATHER complicated. The chemical and structural changes were examined in detail by X-ray DIFFRACTION (XRD), Differential scanning calorimetry (DSC), Scanning electron microscopy (SEM), and Fourier transform infra-red (FTIR) spectroscopy. X-ray diffraction studies showed that sintering temperature as low as 950°C was sufficient to produce a single-phase Y-type hexaferrite material. The dielectric measurements were carried out over the frequency range of 100 Hz to 2 MHz at room temperature using an LCR meter to study the variation of dielectric constant and loss tangent with frequency. The magnetic properties of hexaferrite samples were investigated using a VIBRATION sample magnetometer (VSM), and a superconducting quantum interference device (SQUID) magnetometer in the temperature range 30K to 200K. A change from ferromagnetic STATE to super paramagnetic state has been observed in Co doped Sr 2 Cu 2-x Co x Fe 12 O 22 (x= 0.6 to 1.0) hexaferrite. The novel applications of all types of hexaferrite materials have been described.
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Fluorine acts as a STRONG OXIDISING agent because of its higher electronegativity. Among HALOGENS fluorine is the highest electronegativity atom because of its smaller size.fluorine has only NEGATIVE oxidation state while others have negative as well as positive oxidation state.

The aufbau PRINCIPLE states that in the ground state of an ATOM or ion, electrons fill ATOMIC orbitals of the lowest available energy levels before occupying higher levels. For example, the 1s SHELL is filled before the 2S subshell is occupied. ... Aufbau is a German noun that means construction or "building-up".

The no of protons in an ELEMENT is are considered to be the atomic number....
Eg : H = 1( there is only one protein)
Li = 3 ( have three protons)


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The valency of an element is the NUMBER of hydrogen atoms that can combine with or replace (EITHER directly or indirectly) one atom of the element. ... For example, oxygen has six valence electrons, but its valency is 2. Some elements MAY have more than one combining POWER (or valency), while others have just one.

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Meaning of name Visharad - Name Visharad MEANS Lord Shiva, LEARNED, WISE, Skilful, Famous, Confident, Bold, Name of Shiva.

Definition of resident - a person who lives somewhere permanently or on a long-term basis,

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As we move from left to right in a PERIOD, the no of ELECTRONS in the outer shell of the ATOM increase,which results in increase in nuclear charge of the nucleus ,as the same no of protons are ADDED to nucleas. This increases the force of attraction between nucleus and electrons in outer shell.

Due to this increased force ,the size of the atom shrinks towards the nucleus, and hence the size decreases…

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The scandium hydride complex [(Cp* SiNR)(PMe3) Sc (~-H)] 2,(1)((Cp* SiNR)=((q5-C5Me4) SiMe2 (q1-NCMe3)}) is prepared by hydrogenation of (Cp* SiNR) SCCH (SiMe3) 2 in the presence of trimethylphosphine. The hydride complex is a catalyst precursor for the polymerization of a-olefins, yielding atactic products of low molecular weight (M,= 3000-7000). GC/MS ANALYSIS of VOLATILE, oligomeric products revealed that all scandium centers are active during the polymerization. Selectivity for head-to-tail insertion is HIGH (> 99%) and …


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