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A catalyst is a substance that alters therateof a chemicalreactionbut remains chemically unchanged afterwards. The catalyst increases therateof thereactionby providing a differentreactionmechanism to occur with a lower activation energy.

Therate lawis a differentialequation, meaning that it describes the change in concentration of reactant (s) per change in time. Using calculus, the rate lawcan beintegratedto obtain anintegrated rate equationthat links concentrations of reactants or products with time directly

option D is the right answer

need complete solution

I think (D) is a write answer

Ea= 209 kJ mol-1 = 209 x 103J mol-1T₁ = 600 K, k₁= 1.6x10-5s-1T₂= 700 K, k₂ = ?R = 8.314 JK-1 mol-1log(K₂/K₁) = Ea/2.303R [ (T₂-T₁)/T₁T₂] =209x 103/2.303 x 8.314 x [700 – 600)/ 600 x 700] =2.5989(K₂/K₁) = antilog 2.5989 = 397.1K₂ = 397.1 x K₁= 397.1 x 1.6x10-5s-1K₂ =6.35 x 10-3s-1

T1= 600K ,k1=1.60x10^-5s-1T2=700k ,k2=? ,Ea=209 kJ mol-1

Applying Arrhenius equation, logk2/k1= Ea/2.303R(1/T1-1/T2)=log(1.60x10^-5) + 209000 J mol-1/ 2.303x8.314 JK-1mol-1(700-600/600x700)=(-5+0.2041) + 2.5989 = -2.197 = 3.8030K2=antilog3.8030=6.353x10^-3s-1

Rate expressionis an equation forratelaw and it relates therateof a reaction to therate constantand concentration of the reactants.Rate constantis therateof the reaction when the concentration of the reactants is unity. It is defined by k.

this is not wrong answer

b)A rate law relates the concentration of the reactants to the reaction rate ina mathematical expression. It is written in the form rate = k[reactant1][reactant2], where k is a rate constant specific to the reaction. The concentrations of the reactants may be raised to an exponent (typically first or second power

5. Different reactions have different values of k.

Thanks.

Magnesium burns in air to form Magnesium oxide (MgO)

not understood

The question asks for volume, so we want to calculate litres, L (or mL)2.The concentration of the solution is:0.500 molL

3.Because the question involves mass, we will need to know the molar mass of H2SO4

Using a periodic table we find the molar mass of H2SO4 to be 98.1g·mol-1

Put this information together to solve the problem, arranging the information to end up with the desired unit:

L=1 L0.500 mol×1 mol98.1 g×98.0 g=2.00 L answer

a)PV=nRT

0.5v=0.7R300

so v=420R

In 2nd case the pressure will be same in both flasks and sum of moles of gas will be 0.7

Flask 1-

PV=aRT

P420R=aR300

a=1.4P

Flask2-

PV=bRT

P420R=bR400

b=1.05P

a + b = 2.45P = 0.7

P = 0.28

a= 0.294, b= 0.392

8.

CCl4 has a covalent bond. and electrovalent in CaH2

option -b

tnx

Time taken=5min=5×60s=300secspeed of signal u =3×10^8 m/sDistance=??we know thatspeed= Distance/timeDistance= Speed×Timeputting the valueDistance= 3×10^8 × 300Distance = 9×10^10m

Hello friend!!!

Your question is to find the distance of this distance of spaceship from the ground when the signal travelling at the speed 3 into 10 to the power 8 reach the ground after 5 minutes.

♦1 minute is equal to 60 seconds

♦5 minutes is equal to 60×5 seconds = 300 seconds

★So the distance = speed × time

= 300 × 3 ×10 to the power 8

=9 × 10 to the power 10 meters

★So the distance of the spaceship from the ground is 9 × 10 to the power 10 meters

yes this is a correct answer

distance=speed×timed=3×10^8×300d=9×10^10m

correct answer is 9×10^10m

A unit cell is shared by the other unit cell attached to it’s all surfaces means

A unit cell is shared by other 6 unit cell (because number of surfaces of unit cell is 6)

The maindifference between unicellularandmulticellular issome organisms are made-upofsingle cell termed asunicellularwhile multicellularare made-upoftwo or more cells.Single celledorganismis calledunicellularorganism. They depend on simple diffusion to ride out and live.

difference 1:-1.unicellular organisms are single celled organisms.2.multicellular organisms have more than one cell.

difference 2:-1.the unicellular organisms do various activities on its own.2.multicellular organisms depend on other cells to perform various activities.

difference 3:-1.unicellular organisms include eukaryotes and prokaryotes2.multicellular organisms include eukaryotic cells only.

difference 4:-1.unicellular organisms contain nucleus and some other components.2.but multicellular organisms contain all components like mitochondria so on.

difference 5:-1.unicellular organisms reproduce by asexual reproduction.2.multicellular organisms reproduce by sexual reproduction.

difference 6:-1.ex.amoeba, bacteria , paramaecium .... etc. are examples for unicellular organisms.2.plants,animals,zygote,including humanbeings are examples of multicellular organisms.

difference 7:-1.an injury of unicellular organisms affect the whole body which cause to death.2.an injury of cell in multicellular organisms doesnot affect the whole body.

difference 8:-1.life period is very short in unicellular organisms.2.life period is larger than the unicellular organisms in multicelled.

difference 91.unicellular organisms donot have certain shape2.multicellular organisms have definite shape.

difference 10

1.unicellular includes hetrotrophic.2.multicellular organisms includes both autotrophic and hetrotrophic.

The cathode is a negatively-charged conductor, and the anode is a positively-charged conductor. Electrons, which have a negative charge, flow off the cathode and are attracted towards the anode. A small hole in the anode allows some electrons to pass through it, creating a beam of electrons.

(1) is correct option

The mainthermosettingplastics are epoxy resin, melamine formaldehyde, polyester resin and urea formaldehyde. Good electrical insulator, hard, brittle unless reinforced, resists chemicals well. Used for casting and encapsulation, adhesives, bonding of other materials.

Like my answer if you find it useful!

Thesandysoil has the largest particle size while the clay has the smallest particle size. This tells us that the percolation rate depends directly on particle size and is the highest forsandysoil while theclay soil has the highest retention capacity.

Displacement1in these reaction ,more reactive metal displace less reactive metal from its compound2 it is a slow reaction3 change of colour take place4 e.g fe++cuso4 ---->feso4++cu

double displacement1 there is an exchange of ions between two reactant2 it is a fast reaction3 precipitate are formed4 e.g agno3++nacl-->agcl++nano3

1.ShapeThey Have definite shape - solidThey do not have definite shape - liquidThey do not have definite shape - gas2.VolumeThey have definite volume - solid They do not have definite volume - liquidThey do not have definite volume - gas3.DensityThey have high density. - solidLiquids have less density than solids. - liquidLiquids have least density. - gas4.Kinetic energy of particles. Least - solidMore than solids - liquidMaximum - gas5.Compressibility Negligible - solidLow - liquidHigh - gas

Rigidity: It is the property of matter to resist the change of its shape.Compressibility: It is the property of matter in which its volume is decreased by applying force.Fluidity: It is the ability of matter to flow.Filling a gas container: On filling a gas takes the shape of the container.Shape: Having definite boundaries.Kinetic energy: It is the energy possessed by the particles of matter due to its motion.Density: It is the ratio of mass with per unit volume

An example in a toy is a Newtons Cradle. The momentum of one or more of the balls is conserved.

answer is 100

Given: Normality of H2SO4 =M1 = 0.05 M

Normality of NaOH = M2 = 0.1 M

Vol. Of NaOH= V2= 50 ml

Vol. Of H2SO4 =V1 = ?

Now,,

(M1 × V1) / n1 = (M2 × V2) / n2

Here n1 = n2 = coefficient of NaOH and H2SO4 which is 1

So,, M1×V1 = M2 × V2

Keeping values in it , we get ,.

0.05 × V1 = 0.10 × 50

V1 = (0.10×50) / 0.05

= 5/ 0.05

= [100 ml ] Ans……..

bond order of N2 = 6/2 = 3 , for O2 = (6-2)/2 = 2

for O2+ = (6-1)/2 = 5/2 = 2.5

For O2- = (6-3)/2 = 1.5

N1V1= N2V20.5*100= 0.1*V2500ml

Nylon 66is made of twomonomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid, which givenylon 66its name.

1.Addition2.Hydrolysis/ Condensation 3.condensation

Yes Terylene is example of polyester

thank u so much ##

Monomers are relatively small and simple molecules or units of a large molecule or a polymer. Monomers bond together to form a polymer. The monomers of terylene are ----1. Ethylene Glycol2. Terephthalic Acid

Terylene is a synthetic fibre used for making clothes. It is elastic, highly durable, wrinkle-free.

The acid is benzene-1,4-dicarboxylic acid (old name: terephthalic acid). The alcohol is ethane-1,2-diol (old name: ethylene glycol).

Nylon 66 is made up of 2 monomers -

Each consists of 6 carbon atoms.1) Hexamethylenediamine2) Adipic acid

I can't understand your question

exothermic reaction and endothermic reaction

tq

Terylene is extensively used in textile industry to make hard wear clothes like sarees , taoestry and dress material. Terylene is made by a process of polymerizing ethylene glycol and terepthalic acid. It is also mixed with natural fibre like cotton and wool to make more variety of clothes.

Terylene was exhibited to the Imperial Chemical Industries in 1946, and by 1948 the first polyester lace curtains were commercially available. It quickly became a very popular fabric because of its versatility. Terylene requires little time and effort to clean. In addition, polyester combines well with natural fibers, such as cotton. This winning combination make fabrics both easy to care for and comfortable.

I can't understand your question

the two types of reaction are - exothermic and endothermic reactions.

displacement reation and Double displacement reation

reduction and oxidation reaction

Fructose, or fruit sugar, is a simple ketonic monosaccharide found in many plants, where it is often bonded to glucose to form the disaccharide sucrose. ... Crystalline fructose is the monosaccharide, dried, ground, and of high purity. High-fructose corn syrup is a mixture of glucose and fructose as monosaccharides.

exact short defination

it is a hexose sugar especially found in honey and fruits.

O2= 16×2=32 gm = 1mole 1mole of volume = 22.4lt32 gm oxygen contain 22.4lt volume1 gm oxygen contain = 22.4/328 gm of oxygen contain = 22.4×8/32= 5.6 lt