whether the statements in questions 1) and 2) are True (T) or False (F). The mol
ID: 530492 • Letter: W
Question
whether the statements in questions 1) and 2) are True (T) or False (F). The molar masses of methanol and ethanol are 32.04 g/mol and 46.07 g/ml, respectively. The vapor pressure of ethanol is therefore expected to be higher than the vapor pressure of methanol, The equilibrium constant expression for N_2(g) + 3H_2(g) doubleheadarrow 2NH_2(g) is[H_2]^3/2[NH_3] Which one of the following is not a polyprotic acid? a) H_2SO_4 b) HCl c) H_2PO_4 d) H_2SO_3 e) H_2CO_3 Which Chloride salt is Insoluble in cold water but soluble in hot water? a)CaCl_2 b)Agcl c)Bacl_2 d)pbcl_2 e)Hg_2cl_2 which one of the following would be used to differentiate between solid Agcl and Bacl_2? a) AgNO_3 b) HCl c) H_2O d) HNO_3 e) HBr which one of the following would be used to differentiate between HNO_3 and HCl? a) H_2So_4 b) pdcl_2 c) H_2O d)AgNO_3 e) NaClExplanation / Answer
1) true
higher molar mass of ethanol so high will be vapour pressure
The relation between vapour pressure and molar mass of a gas can be found using VAPOUR DENSITY
vapour density is the ratio of mass of a volume of gas to the mass of an equal volume of hydrogen.Higher the vapour density ,higher will be the vapour pressure of a gas,
Vapour density=(mass of a given volume of a gas)/mass of same volume of hydrogen
Avogadro's law states that equal volume of all gases have same number of moles
So,vapour density=mass of n molecules of a gas/mass of n molecules of hydrogen=mass of 1 molecule of a gas/mass of 1 hydrogen molecule
or,vapour density=mass of 1 molecule of a gas/2*mass of one Hydrogen atom=relative molar mass/2
or,vapour density=relative molar mass of a gas/2
So higher the molar mass, higher the vapour density of a gas,high will be its vapour pressure
2) false
Keq=[NH3]^2/[N2][H2]^3
or
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