Explore topic-wise InterviewSolutions in .

H2O is polar and CO2 is nonpolar.

Reasons: CO2 is linear and the bond dipole moments sum to zero, water is planar but bent and the bond dipoles and unshared electron dipole moments do not sum to zero.

Like my answer if you find it useful!

thnx for ur answer

Reasons: CO2 is linear and the bond dipole moments sum to zero, water is planar but bent and the bond dipoles and unshared electron dipole moments do not sum to zero.

Short answer: Just short of 11.5 kg.

How do I know that? Well, we have to make some assumptions.

1. that charcoal is 100% carbon.

2. that the reaction is a complete combustion of coal with oxygen in the air into carbondioxide.

With these out of the way it's pretty straight forward. We need to first establish the balanced reaction:

C(s) + O22(g) -> CO22(g)

Well that was simple enough. So one can see that there is a one-to-one molecular relationship between carbon and oxygen.

Next we need to establish how many carbon atoms there are in 1 kg coal. To reduce the size of the number one normally uses the unit mol instead (1 mol is about 6.022×102323). In the periodic system we can see that 1 mol carbon weighs 12 grams (it is in fact how we establish what one mol is). We call this number the molar mass,M.It's relatively easy to see that there is a relationship between mass,m, number of moles,n,andM:

n = m/M.

In the periodic table we also see that molar mass of oxygen is 32 g/mol (2 oxygen atoms per molecule).

We know from the balanced reaction formula thatnof C equalsnof O22but from the relation above we can also write this as:

1. Electronic configuration, 2.8.32. XCl33.X2O3.The element is Al and it forms amphoteric oxides.

DEFINITION:-Existence of an element in more than one physical forms in the same physical state is calledALLOTROPY and different physical forms are referred to as ALLOTROPES.Allotropes of an element are differing in physical properties but they have same chemical properties.Carbon exists in two allotropic forms:Crystalline formAmorphous form

CRYSTALLINE FORMS

There are two crystalline forms of carbon.DiamondGraphite

AMORPHOUS FORMS

There are a number of amorphous forms of carbon such as:coalcokelampblackanimal charcoalcarbon black etc .

अंतर्राकाशी यौगिक :

संक्रमण तत्व अंतर्राकाशी यौगिक बनाते है।

व्याख्या :

संक्रमण तत्व जब एक दूसरे के नजदीक आते है तो उनके मध्य कुछ रिक्त स्थान शेष रह जाता है इसे अंतर्राकाशी स्थान कहते है।

अंतर्राकाशी स्थान में छोटे आकार के परमाणु जैसे H , B , C , N आदि के समा जाने से जो यौगिक बनते है उसे अंतर्राकाशी यौगिक कहते है।

अंतर्राकाशी यौगिको के गुण :

कठोरता बढ़ जाती है।

गलनांक अधिक हो जाता है।

घनत्व अधिक हो जाता है।

क्रियाशीलता कम हो जाती है।

चालकता में परिवर्तन नहीं होता।

उत्प्रेरक :

अधिकांश संक्रमण तत्व उत्प्रेरक के रूप में काम आते है।

व्याख्या :

इनमे आंशिक भरे हुए d कक्षक होते है।

ये परिवर्तित संयोजकता प्रदर्शित करते है।

मिश्र धातु :

दो या दो से अधिक धातुओं के विलयन को मिश्र धातु कहते है।

जैसे : पीतल (कॉपर + Zn) , कांसा (Cu + Sn)

अधिकतर संक्रमण तत्व मिश्र धातु बनाते है।

व्याख्या :

संक्रमण तत्वों के आकार लगभग समान होने के कारण इनके क्रिस्टल जालको में से परमाणु एक दूसरे को प्रतिस्थापित कर देते है।

Clear picture please?

clear picture please?

The human body uses proteins for many things, including repairing and building tissues, acting as enzymes, aiding the immune system, and serving as hormones. Each of these important functions requires a slightly different form of protein. In spite of their differences in structure, all proteins contain the same basic sub-components.

Proteins are one of the four different types of macromolecules, in addition to carbohydrates, lipids, or fats, and nucleic acids, such as DNA and RNA.Macromoleculesare large molecules that perform specialized functions inside living organisms. The structural arrangement of a protein molecule will differ in accordance with its function.

Proteins are long chains ofamino acids. Amino acids are the building blocks of protein. In other words, amino acids are like the links in a chain. The chain itself represents the protein molecule. Protein chains are then twisted and folded together in specific ways to create certain molecules.

This example shows our primary protein chain as it's twisted into a helical shape, folded into a sheet, and then twisted all over again into an intricate globular shape. In this case, the final product is a protein molecule known as hemoglobin, which can be found in your blood.

sources of protein:Earlier, we mentioned that protein plays a role in tissue repair, and that's why it's so important to have protein in your diet. But what are the best sources of protein? And, are there different types of protein? Let's explore these questions. Afterwards, you might take a look in your refrigerator and decide whether your diet is protein rich or protein poor.

Protein can be found in all living things. The type and amount of protein within foods can vary, but inevitably, it's there in some form. Meats, cheeses, and nuts tend to have a higher protein content than many plant-based sources. To determine the protein content of a food, we'll need to read its nutrition label.

van der Waals constant a is a measure of intermolecular forces and b is a measure of molecular size.A greater value of a and lesser value of b supports liquefication of a given gas. Therefore, chlorine is more easily liquefied than ethane because a for Cl2 > a for C2H6 but b for Cl2 < b for C2H6

Thevan der Waals' equation can be written as follows:Significance of van der Waals'parameter'a': It is the measure of the magnitude of attractive forces between the molecules of a gas. Larger the value of 'a', larger will be the intermolecular force of attraction.

Real GasesBehave Differently. ... Originally, the idealgas lawlooks like this: PV = nRT. P is the pressure in atmospheres, V is the volume of the container in liters, n is the number of moles ofgas, R is the idealgasconstant (0.0821 L-atm/mol-K), and T is the temperature in Kelvin

Thevan der Waals equation of stateapproaches the ideal gas law PV=nRT as the values of these constants approach zero. ... Constant b is a correction for finite molecular size and its value is the volume of one mole of the atoms or molecules.

Let the force be F,Mass is M,time for which it is accelerated = 2svelocity is increased from 3m/s to 7m/sso, acceleration is , a = (7-3)/2 = 2m/s²The force applied is, F = ma = (5)(2) = 10 NNow, the force is applied for 5s, the velocity after 5s will be,v=u+at=> v =3+(2)(5)=>v=13m/s , this is final velocity.

manure contains large quantities of organic matter

The bee - sting causes pain and irritation because it contains methanoic acid which causes pain and irritation.Baking soda being alkaline neutralises acid and gives relief.

Classificationofcostmeans, the grouping ofcostsaccording to their common characteristics. The important ways ofclassificationofcostsare: By Nature or Traceability: DirectCostsand Indirectcosts. DirectCostsare Directly attributable/traceable toCostobject.

HeliumAs rest are all metals whereas Helium is a gas.

1) molecules - all others are building unit of atoms2) Lavoisier - not related to atomic discovery3) carbon - not an isotope of hydrogen4) barium - not radio active

John Daltondevised the first atomic symbols, but they looked alittledifferent from the ones we use today. __1803: __Englishchemist-physicist John Daltonstarts using symbols to represent the atoms of different elements.

Principlesof EffectiveTreatment. Addiction is a complex but treatable disease that affects brain function and behavior. Drugs of abuse alter the brain's structure and function, resulting in changes that persist long after drug use has ceased.

a) Bronze is an alloy consisting primarily of copper, commonly with about 12% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.

b) It is the process of refining of metal in which impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of metal salt is used as an electrolyte.

Molecular weight of KNO3 is 101.1So, percentage of K = 39.1 / 101.1 = 0.387 or 38.7%percentage of N = 14 / 101.1 = 0.138 or 13.8%percentage of O = 48 / 101.1 = 0.475 or 47.5%

Atornadois a narrow, violently rotating column of air that extends from the base of a thunderstorm to the ground. Because wind is invisible, it is hard to see atornadounless it forms a condensation funnel made up of water droplets, dust and debris. Tornadoes are the most violent of all atmospheric storms.

Zr and Hf exhibit similar propertiesdue to lanthanoid contraction. Electrons present in f subshell didn'tdogood shielding due to which with the increasing atomic number or increasing effective nuclear charge size gets constricted and size of Halfenium and Zirconium becomes almost equal.

Let the total no. of moles be 1

now, mole fraction of ethanol is 0.04 , so no. of moles of ethanol is 0.04/1 = 0.04

so, moles of water will be 1-0.04 = 0.96 moles

so, mass of water will be 0.96*18 = 17.28gm

and since the density of water is (1gm/ml)

so, volume of water (solvent will be ) = 17.28/1 = 17.28ml

so, the molarity = moles of ethanol/(volume of solution) = 0.04*1000/17.28 = 2.26M

THELOSS OF STATIC ELECTRICITY AS CHARGES MOVE OFFAN OBJECT IS CALLEDELECTRIC DISCHARGE. SOMETIMESELECTRIC DISCHARGEOCCURS SLOWLY. FOR EXAMPLE, CLOTHES STUCK TOGETHER BYSTATIC ELECTRICITYWILL EVENTUALLY SEPARATE ON THEIR OWN BECAUSE THEIRELECTRIC CHARGESARE TRANSFERRED TO WATER MOLECULES IN THE AIR OVER TIME.

so the answer electric discharge

(a) Zinc(Zn)

(b) Copper (Cu)

(c) Copper sulphate (CuSO4)

(d) Displacement reaction; CuSO4 (aq) + Zn (s) ZnSO4 (aq) + Cu (s)

(e) Brass

2) is correct answer

2)2:1 is the right answer of the following

(2) 2:1 I'd answer of this problem.

2) is the correct answer

Ablackbody(sometimes spelled "black body") is a theoretically ideal radiator and absorber of energy at all electromagnetic wavelength s. The term comes from the fact that a cold blackbodyappears visuallyblack. The energy emitted by ablackbodyis calledblackbodyradiation.

djvxjdvsjkrgjddnjdjd

by mistake sorry please

The above statement is false. A mixture of ideal gases cannot be liquefied as there are no attraction forces present in an ideal gas.

the componets used for making alloys of steel and stainless steel is nickel, chromium and iron

ty

b)Oxygen occurs as O2 molecule due to pπ-pπ bonding because of which the intermolecular forces in it are weak van der Waals forces as it is small in size with high electron density which tend to repel the other O2 molecules. As a result it exists asgas.

On the other hand, sulphur does not form strong S=S double bonds hence exists as S8 held together by strong covalent bonds and exists as a polyatomic molecule, in which intermolecular forces are strong so, it exists as asolid.

Fill in the blanks1)does not change2)an irreversible3)exothermic4)solvent5)hydrogen6)moisture

A simple combustion reaction is given for methane. The combustion of methane means that it is possible to burn it.

Chemically, this combustion process consists of a reaction between methane and oxygen in the air.

When this reaction takes place, the result is carbon dioxide (CO2), water (H2O), and a great deal of energy. The following reaction represents the combustion of methane:

CH4[g] + 2 O2[g] -> CO2[g] + 2 H2O[g] + energy .

Respiration is the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells)Types of respiration1)BREATHING or ventilation.2)EXTERNAL RESPIRATION, which is the exchange of gases (oxygen and carbon dioxide) between inhaled air and the blood.3)INTERNAL RESPIRATION, which is the exchange of gases between the blood and tissue fluids.4)CELLULAR RESPIRATION

Let the edge length of cube be a.

Then the volume of total cube is a3.

As in simple cubic cell, the atoms are present only at the corners and touches each other therefore a = 2r

Hence, Volume in terms of radius = (2r)3

= 8r3.

The number of atoms present in simple cube is 1 atom per lattice.

Therefore the volume of one atom whose radius is r = 4/3 π r3.

Hence the fraction of total volume occupied by the atoms present in a simple cube is = 4/3 π r3/ 8r3× 100 %

= π/6 × 100 %

= 52.4 %.

answer=52.4%is the correct

Given condition :Weight of N2gas = 7gTemperture = 27oCPressure = 750mm Hg = 75/760 = (75 mmHg / 760.0 mmHg/atm ) = 0.98 atm 'n' for 7 g N2gas = 7/14 = 0.5 molesRearrange the Ideal Gas Law equation is given as

V = nRT / P= (0.5 mol x 0.08206 L atm/mol/K x 300 K )/ 0.98 atm = 1250 L Answer

Silver is the best conductor

Cement:Calciumoxide is a key ingredient for the process of making cement. As a cheap and widely available alkali. About 50% of the total quicklime production is converted tocalcium hydroxidebefore use. Both quick- and hydrated lime are used in the treatment of drinking water.

17 1)a)double displacement reactionb)decomposition reactionc) decomposition

option c is the answer

10 molecules of sodium sulphide

0.375 mole into oxyzen