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Tani Gupta 2 years, 7 months ago

Xb= 1/4, Xa=3/4

Arpit Agnihotri 2 years, 8 months ago

46%(w/w) C2H5OH = 46 gram of C2H5OH (solute) present in 100 gram of solution(solvent:water) mole fraction = (mole of solute)/ (mole of solute + mole of solvent) so, mole fraction of C2H5OH = [46/(2*12+6*1+1*16]/[{46/(2*12+6*1+1*16}+{54/2*1+1*16}] = [46/46]/[{46/46}+{54/18}] = 1/[1+3] = 1/4 hence, ans : mole fraction of C2H5OH = (1/4) molar mass of: C - 12; H - 1; O - 16 mole = mass / molar mass

Deepam Rawat 2 years, 8 months ago

.25 of ethylene gycocol
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Arpit Agnihotri 2 years, 7 months ago

total weight of solution(NaOH+H20) = 40+54 = 94 mole = mass/molar mass the molar mass of Na =40; O =16;H=1 mole fraction = mole of substance to be founded/mole fraction of solution now, mole fraction of NaOH = moles of NaOH/ (Mole of NaOH+Mole of H2O) = (40/40)/[(40/40)+(54/1*2+16*1)] = 1/[1+3] = 1/4 so, mole fraction of NaOH in the solution = 1/4 mole fraction ( solute+solvent) = 1 therefore mole fraction of H2O = 1-(1/4) mole fraction of H2O=3/4

Rohit 2 years, 8 months ago

1/4

Anshul Pratap Singh 2 years, 8 months ago

1
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Aman Soni 8083 2 years, 8 months ago

Hii
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Shehnaz Shehnaz 2 years, 8 months ago

I.C.T teacher
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Yukti - 2 years, 7 months ago

Prime factors=3²*5²*17

Shreya Agnihotri 2 years, 8 months ago

3×3×5×5×17
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Aryan Kumar 2 years, 8 months ago

Copy writer
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Siddesh Gadre 2 years, 8 months ago

4/9×2/4=2/4×4/9 2/9=2/9 Therefore LHS=RHS

Vedanshi Dabhi 2 years, 8 months ago

Fgh vv
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Rahi Patel 2 years, 8 months ago

Word meaning
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Parv Jain 2 years, 8 months ago

16ⁿ = (2×2×2×2)ⁿ Prime factorisation of 16ⁿ does not contain the prime factor 5. Therefore, 16ⁿ cannot end with digit 0 for any natural number n
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Mayank 1234 2 years, 7 months ago

Hi
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Muskan Saha 2 years, 8 months ago

These are the different method for controlling soil erosion are: 1) afforestation 2) contour farming 3)strip cropping 4) checking overgrazing 5) conservation tillage 6) minimum cultivation

Pavan Kumar 2 years, 8 months ago

Social mcq

Pavan Kumar 2 years, 8 months ago

Hii

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