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haemoglobin contains 0.25% iron by weight. The molecular weight of haemoglobin is 896000. Calculate the number o iron atom per molecule of haemoglobin.

I need a perfect explanation to this questioncalculate the amount of Ni needed in the mond's process given below Ni + 4CO --- Ni(CO)4 if CO used in this process is obtained through a process, in which 6g of carbon is mixed with 44 g CO2 is

40ml of a mixture of c2h2 and co is mixed with 100ml of o2 gas and the mixture is exploded. the residual gases occupied 104ml and when these are passed through KOH solution, the volume becomes 48ml. all the volume are at same temperature and pressure. determine the composition of original mixture

_{2}O_{3}) by the reaction with carbon.Fe

_{2}O_{3}+ C --> Fe + CO_{2}Q3. Ethyl chloride (C

_{2}H_{5}Cl) is prepared by reaction of ethylene with hydrogen chloride :C

_{2}H_{4}(g) + HCl(g) $\stackrel{}{\to}{\mathrm{C}}_{2}{\mathrm{H}}_{5}\mathrm{CL}\left(\mathrm{g}\right)\u2206\mathrm{HH}=\u201372.3\mathrm{kJ}$What is the value of $\u2206$E( in kJ ), if 70 g of ethylene and 73 g of HCL are allowed to react at 300 K?

(A) –69.8 (B) - 180.75

(C) – 174.5 (D) – 139.6

the number of electrons present in an Azide ion (N

_{3}^{-})?_{2}thena) Oxygen is the limiting reagemt.

b) Volume of CO

_{2}produced at NTP is 50.4L.c) C and O combine in mass ratio 3:8.

d)Volume of unreacted O2 at NTP is 11.2 L.

calculate the numbers of atom of C and O in 72.5g isopropanol C3H7OH (MOLAR MASS 60)

State-1 (8.0 bar, 4.0 litre, 300 K)

State-2 (2.0 bar, 16 litre, 300 K)

State-3 (1.0 bar, 32 litre, 300 K)

Total heat absorbed by the gas in the process is:

(A) 116 J (B) 40 J (C) 4000 J (D) None of these

(a) 2 g atom of N

(b) 3×10 raised to 23 atoms of C

(c) 1 mole of S

(d) 7 g silver

Ans given as : option b.

Q.14. 1 mole of a diatomic element ${X}_{2}$ contains 34 and 40 moles of electrons and neutrons respectively. The isotopic formula of the element is

(a) ${}_{34}{}^{74}X$

(b) ${}_{17}{}^{37}X$

(c) ${}_{34}{}^{40}X$

(d) ${}_{20}{}^{40}X$

How many mL of perhydrol is required to produce sufficient oxygen to convert 2L of SO2 gas to SO3?

Q1. ${\mathrm{A}}_{2}+2{\mathrm{B}}_{2}\stackrel{}{\to}{\mathrm{A}}_{2}{\mathrm{B}}_{4}\mathrm{and}\frac{3}{2}{\mathrm{A}}_{2}+2{\mathrm{B}}_{2}\stackrel{}{\to}{\mathrm{A}}_{3}{\mathrm{B}}_{4}$

Two substance A

_{2}and B_{2}react in the above manner ; When A_{2}is limited it gives A_{2}B_{4}, When in excess gives A_{3}B_{4}, A_{2}B_{4}can be converted to A_{3}B_{4}when reacted with A_{2}. Using this information, calculate the composition of the final mixture when mentioned amount of A_{2}and B_{2}are taken(A) If 4 moles of A

_{2}and 4 moles of B_{2}is taken in reaction container(B) If $\frac{1}{2}$ moles of A

_{2}and 2 moles of B_{2}is taken in reaction container(C) If $\frac{5}{4}$ moles of A

_{2}and 2 moles of B_{2}is taken1.1*10^{-4}Kgof, 2)CO_{2}5.6 cm, 3)^{2}of Ammonia at STP0.4g of Helium gasQ). Phosphoric acid is widely used in carbonated beverages, detergents, toothpastes and fertilizers. Calculate the mass percentage of H, P and O in phosphoric acid if atomic masses are H = 1, P = 31 and O = 16. (Ans. H - 3.06%, P - 31.63%, O - 65.31%)

T= kV, find out the molar heat capacity of the gas during the process. (Assume vibrational degree of freedom to be active.)(A) $\frac{5}{2}\mathrm{R}$ (B) 3 R (C) $\frac{7}{2}{\mathrm{R}}$ (D) 4 R

Calculate the number of formula units in 159g of PbCrO

_{4}Q. What is the net work done (in calories) on 1 mole f monatomic ideal gas in a process described by 1,2,3,4 in given V-Y graph.

Use: R = 2cal/mole K

In 2 = 0.7

a. 600 cal

b. -660 cal

c. +660 cal

d. +600 cal

_{3}required to produce 5.6 litres of O_{2}at STP is-^{3}of ethyne at STP.(Don't Give Answer of Problem I Had It. Only Explain Hydrogenation.Q36. A gas mixture contains acetylene and carbon dioxide. 20 litre of this mixture requires 20 litre of oxygen under the same condition for complete combustion. The percentage of acetylene in the mixture is

(a) 50% (b) 40% (c) 60% (d) 75 %

Q37. 8.4 gram of a mixture of CaCO

_{3}and MgCO_{3}on heating gives 4.0 gram of magnesium oxide. The volume of CO_{2}produced at STP in this process is(a) 1.124 litre (b) 4.48 litre

(c) 2.24 litre (d) 3.36 litre

A. 18

B.18? Avogadro's number

C.54

D. 54?Avogadro's number

What is the change in internal energy (?U) of the gas?

an organic compound of weight 108g has c,h,n in the ratio 9:1:3:5 by weight. find molecular formula

(a)1186

(b)84.3

(c)118.6

(d)11.86

Need proper explanation and a step by step solution for the same?

Ans: option B. Why?

In fact SrF2 is most ionic, so it must be most soluble?!

An organic compund was found to contain 40% carbon, 6.66% hydrogen. finds its emperical formula

50 g of CaCO3 is allowed to react with 73.5gm of H3PO4. calculate - amount of Ca3(PO4)2 formed. amount of unreacted agent.

(200 mL)

calculate the mass of potassium chlorate required to liberate 6.72dm3 of oxygen at STP ,molar mass of potassium chlorate is112.5g /mole?

state and explain law of conservation of mass?

molality of 2%w/w NacCl solution is?

^{3}and containing 18.6 % NH_{3 }by weight. The mass of NH_{3 }per cc of the solution is.$\left(1\right)0.17g/c{m}^{3}\phantom{\rule{0ex}{0ex}}(\hspace{0.17em}2)0.34g/c{m}^{3}\phantom{\rule{0ex}{0ex}}\left(3\right)0.51g/c{m}^{3}\phantom{\rule{0ex}{0ex}}\left(4\right)0.68g/c{m}^{3}$