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Iron is pure and brittle. Used historically for weaponry before we figured out how to add carbon to it.Pig iron has a high carbon content and is an intermediate product for making steal.Wrought iron is iron with a low carbon content, it was used in place of steel before steel became available but is now used in the steel making process.Cast iron is iron that has been shaped by being poured into a cast. Uses include pots and pans etc.Steel is iron mixed with carbon which increases strength and makes it less brittle. This is used for construction among other things.

moles of 50g Iron = 50/56 = 0.89 ✓

Moles of 5g atom of N = 5/14 = 0.35

moles of 0.1g silver = 0.1/108 < 0.89

moles of C = 1/6 moles

so , option (1) is correct

sea water freezes at a lower temperature but boils at a higher temperature because of the presence of salt in it.

the sea water just boils like fresh water but fresh water is not containing any amount of salt thus it boils at a lower temperature but sea water is containing excessive quantity of salt as compared with fresh water thus it freezes at a lower temperature.

Crop only the question that you want a solution for. We will not be able to provide solutions to multiple questions.

Atomic number is Number of electrons in an atom.Now, Most of the chemical properties depend upon its valency electrons and Electronic configuration.So,atomic number is more important to a chemist, than its relative atomic mass.

Definite Mass and Volume and Shape: Mass and Volume of a solid and liquids remain same. But unlike liquids solids also have a fixed shape. The tightly packed atoms of a solid ensure that they maintain a definite shape.

Strong Intermolecular Forces: The tight close knit packing of molecules is due to the strong intramolecular forces between particles. This also means that the intermolecular distances between particles are also very small/short. This is the reason why solids hold their shape and do not spread out like liquids or gasses.

Solids are Incompressible: As there is already no spaces between molecules, solids cannot be compressed further

Boiling Points: Solids have Boiling and Melting Points above room temperature

Thermal Energy: Solids have low thermal energy. So this means their constituent particles do not roam about freely like in liquids and gases. They only oscillate about their mean positions.

thanks

The intermolecular forcespresentbetween HF moleculesare mainly dipole interaction and Hydrogen bonds. Hydrogen bondingwhichis a dipole-dipole interaction.

Mercury is the right answer

metal is mercurynon metal is bromine

Metal=mercuryNon metel=bromine

mercury is the meatl and bromine is the non metal which exist in liquid state at room temperature.

Hydrogen bondingwhichis a dipole-dipole interaction.The intermolecular forcespresentbetween HF molecules are mainly dipole interaction and Hydrogen bonds.

thanks

To find the ratio in moles you divide by theArof each element.Using approximate values:Ratio in gramsC:H:O⇒40:6.7:53.3Ratio in moles⇒4012:6.71:53.316⇒3.33:6.7:3.33Dividing through by3.33⇒1:2:1So the empirical formula is:CH2O

In 100 g of the unknown, there are40.0⋅g12.011⋅g⋅mol−1C;6.7⋅g1.00794⋅g⋅mol−1H; and53.5⋅g16.00⋅g⋅mol−1O.

We divide thru to get,C:H:O=3.33:6.65:3.34. When we divide each elemental ratio by the LOWEST number, we get an empirical formula ofCH2O, i.e. near enough to WHOLE numbers.

Now the molecular formula is always a multiple of the empirical formula; i.e.(EF)n=MF.

So60.0⋅g⋅mol−1=n×(12.011+2×1.00794+16.00)g⋅mol−1.

Clearlyn=2, and the molecular formula is2×(CH2O)=CxHyOz.

Sat that the pressure is 100 units and the volume is 100 units

Equation :

P1V1 = P2V2P1*95 = 100*100P1 = 10,000/95P1 = 105.26 units

The pressure must be increased by 5.26%

bt hw???95 comes frm?

by determining the rate constant at 2 different temperatures

when the reaction is reversed , the equilibrium constant becomes reciprocal of the actual reaction

and when its coefficients are halved it gets 1/2 power on it

so, for the reaction shown below

the equilibrium constant will be (1/k)^(1/2)= 1/√278

It doesn't let's it to get moisture

In the case 2 hydrogen gas is released

Given mass = 50 g

Molecular weight of CaCO3 = 100 g / mol

No. of moles (n) = Given mass (m) / Molecular weight (M)

n = 50 / 100n = 1 / 2n = 0.5

No. of molecules = n * 6.022 * 10²³= 0.5 * 6.022 * 10²³= 3.011 * 10²³

No. of atoms = 5 * 3.011 * 10²³= 15.055 * 10²³

Ans :- Isobars are atoms of different chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number but have the same mass number. An example of a series of isobars would be ⁴⁰S, ⁴⁰Cl, ⁴⁰Ar, ⁴⁰K, and ⁴⁰Ca.

Isobars are atoms of different chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number but have the same mass number. An example of a series of isobars would be ⁴⁰S, ⁴⁰Cl, ⁴⁰Ar, ⁴⁰K, and ⁴⁰Ca.

Isobars are atoms of different chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number but have the same mass number. An example of a series of isobars would be ⁴⁰S, ⁴⁰Cl, ⁴⁰Ar, ⁴⁰K, and ⁴⁰Ca.

In case of isobar different atomic have same atomic mass of number is called isobar

very intelligent answer

option B is the answer.

1.We should always wear a mask during spraying a pesticide.

2.We should never touch the nozzle of the container used to spray pesticide.We can come in contact with the pesticide.

3.We should cover our hands with gloves.

4.We should always spray the pesticide in the direction of air so that the pesticide doesn't come towards us.

There will be 15 spectral lines emitted when the excited electron of a Hydrogen atom in n = 6 drops to the groundstate. They are 5 transitions arising out of 6 level (6->5, 6->4, 6->3, 6->2, 6->1); 4 transitions arising out of 5 level(5->4, 5->3, 5->2, 5->1) 3 transitions arising out of 4th level (4->3, 4->2, 4->1); 2 transitions arising out of the 3rdlevel (3->2 and 3->1) and 1 transition from 2->1 for a total of 15 spectral lines.We can also use the formula no.of spectral lines = n(n-1)/2.Here n=6; therefore the no. of spectral lines = 6(6-1)/2 = 30/2 = 15 lines

Mercury vapor is bombared by the electrons

Neon is the right answer

neon is the correct answer

mercury vapor is bombarded with by the electron

Isotopes:The atoms which posses same atomic number (the atoms same element) but different mass number are called Isotopes.Ex:₁H¹,₁H², ₁H³These are the isotopes of Hydrogen.The difference in mass number is due to different number of neutrons present in the nucleus.

Isobars:The atoms which posses different atomic number with same mass number are called Isobars.Ex : ₁₈Ar⁴⁰,₂₀Ca⁴⁰

But I need some examples for solving

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom

thamks

isotpoes are the atoms of same element having same atomic no. and different atomic mass no. due to the variations in no. of neutrons present in the nucleus of the atom. Due to which there is change in physical constants . They are sometimes used in medical treatments.

.Isotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behaviour but with different atomic masses and physical properties. .Every chemical element has one or more isotopes.

The atom of the same element having same atomic number but different mass no is called isotopes

I think that isotopes are the element having same atomic number but different mass for e.g chlorine..☺️

No. of electrons in O(2-) is 8+2 = 10

1.Nickel have 1 unpaired electrons.it is 3d6 we need to fill 8 electrons in 5d orbital.5 electrons are filled and remaining 3 forming 3 pairs.2.cobalt have 2 unpaired electron.3.cr2+ has 4 unpaired electrons.4.Fe3+ has 5 unpaired electrons.

option a is correct.

Molality of the glucose =no of mole of glucose in 1 kg of waterNo of mole of glucose =weight of the glucse/molecular weight of the glucose =54/180 =.3we have ,delta Tf=Kfmdelta Tf= (1.86*.3)/.250=2.232temperature at which it will freeze=273 -2.232 K =270.768 K

Continuous plantation of crops in a field makes the soil poor in certain nutrients such as nitrogen, phosphorus, potassium, etc. Plants require nutrients for their proper growth and functioning. When a farmer continues to grow’ crops one after the other, then all nutrients available in the soil reduce and the crop yield decreases automatically

Ag + Cl = AgCl

Ag = 108

Cl = 35.5

AgCl = 143.5

143.5 g AgCl obtained from 108 g Ag

Therefore 2.87 g AgCl can be obtained from 108 x 2.87 / 143.5

= 108/50

= 2.17 g

x = 2.17 g of Agoption b

Thank you so much but be careful while writing the IUPAC name use capital letters while you begin writing the name.for eg Di not di..😊

The term Activation Energy was introduced in 1889 by Svante Arrhenius, a Swedish scientist. It is defined as the least possible amount of energy (minimum) which is required to start a reaction or the amount of energy available in a chemical system for a reaction to take place

In chemical kinetics a reactionrate constantor reactionratecoefficient, k, quantifies therateof a chemical reaction. For a reaction between reactants A and B to form product C a A + b B → c C. the reactionrateis often found to have the form: Here k(T) is the reactionrate constantthat depends on temperature

The collision frequency is defined as the number of collisions per unittime

Zero order kinetics.

First Order Reactions

mko smjh me hi ni aaya

Answer:c) Benzene

Explanation:The solutions obtained by dissolving a solute in any solvent other than water are called non aqueous solutions (non acqueous means without water). For example, if a solute is dissolved in any solvent such as benzene, alcohol, ether, carbon, disulphide, carbon tetrachloride, acetone, etc., the solution obtained is called a non aqueous solution

A phase-transfer catalyst or PTC is a catalyst that facilitates the migration of a reactant from one phase into another phase where reaction occurs. Phase-transfer catalysis is a special form of heterogeneous catalysis.