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The mass of 7.02 x 10E-23 molecules of a diatomic molecule X2 is 296.0g. Calculate (to two decimal places) the Atomic Weight (amu) of the element X.
7.02×1023/6.023×10231.166296/1.166= 253.86g
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Determine of pH of acid solutions like 0.1m hcl,0.5m hcl,0.025m hcl,0.0125m hcl by using quinhydrone and calomel electrode .compare the values of pH with theoretically calculated values.
pH = -lg [H + ]; 0.1m hcl: pH = 1; 0.5m hcl: pH = 0.3; 0.025m hcl: pH = 1.6; 0.0125m hcl: pH = 1.9.
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The pure rotational spectrum of 1H131I consists of a series of lines separated by 13.10 cm−1 Calculate (a) the moment of interia, and (b) the internuclear distance.
Moment of inertia = r^2 = 13.1^2= 171.61 kg. cm^2Internuclear distance = 171.61/131×13.1 × 10^1= 171.61pm
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The experimentally observed dipole moment of HCl is 1.08D. what magnitude of charge on the H and Cl atom would lead to this dipole moment if the bond length of the HCl molecules is 1.24Å
1.08 × 1.24 × 4.8u= 6.38×10−30
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Balanced equations for the following does reaction occur thank you
Fe + HCl
Cu + HCl
Zn + HCl
Fe + HNO3
Cu + HNO3
Zn + HNO3
Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g) – reaction occurs Cu(s) + 2HCl(g) → CuCl2(s) + H2(g) – reaction occurs at 600 Celcius Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)...
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How many mL of concentrated HCL solution are needed to provide 90.0g of HCL? Concentrated HCL solution is 37.0% HCl by weight and has a density of 1.19 g/mL.
p =m/V 1,19 = 90/V V = 75,63 ml - it's volume of 37% HCL Need to solve a mass of full solution ( x = V(HCL)+(H2O) ), then 75,63...
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Which half reaction balanced show work
3io3+ 16h++18e is is+ 9h2o
Io3+6h++4e is is+3h2o
3io3 +18h+ 15e is 3i3+9h2o
3io3+12h+10e is i3 +6h2o
the half reaction with IO32IO3--+12H++10e--=I2+6H2OThis reaction all is mistaked
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6.) A 11.5 ml solution of HCl has 0.531 g/L of HCl in solution. Calculate the concentration, amount of moles of HCl, and pH of the solution.
1)C(HCl)=0.531/36.5=0.0145 mol/L2)n(HCl)=0.531*0.0115/36.5=1.673 *10^-4 mol3)pH=-lg[H+]=-lg(1.673*10^-4)=3.78
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A 11.5 ml solution of HCl has 0.531 g/L of HCl in solution. Calculate the concentration,
amount of moles of HCl, and pH of the solution
0.0115 x 0.531/36.5 = 1.67e-4 moles.1.67e-4/0.0115=0.0145 M.pH: 1.83863199777
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what is the wavelength of a proton(mass =1.673 x 10e-27kg) traveling at a speed of 4.55 x 10e6 m/s?
Given mass of proton, M = 1.673 x 10e-27kgspeed of proton, V = 4.55 x 10e6 m/sMomentum of this proton, p = MV kg.m/s = 1.673 x 10e-27 × 4.55×10e6...
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