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Calculate the standard entropy of vaporization (ΔS°vap) of CF2Cl2(l).?
The standard enthalpy of vaporization for CF2Cl2 is 165.20 J/g at its normal boiling point of -29.79°C.
Answer to the nearest 0.1 J K-1 mol-1.
1 AnswerChemistry2 years agoSolid RbBr has the NaCl structure.The shortest distance between the centre of rubidium cation and the centre of a bromide anion is 343.5pm.?
Calculate the length of the edge of the conventional face-centred cubic unit cell of RbBr.
Calculate the density of solid RbBr.
Calculate the shortest distance (centre to centre) between two bromide anions in solid RbBr.
1 AnswerChemistry2 years agoIntermolecular forces?
Which has the greatest heat of vaporization?
H2Te
H2S
H2O
H2Se
Which has the smallest vapour pressure at 25°C?
H2O
CO2
SiO2
Which has the lowest normal boiling point?
Hg
NaCl
N2
Which has the least viscosity?
CH3CH2OH
HOCH2CH2OH
CH3(CH2)3CH3
Which has the smallest heat of vaporization?
H2O
CH4
NH3
1 AnswerChemistry2 years agoFor each of the following reactions, answer: True or False? -- "This is an oxidation-reduction (redox) reaction."?
6KCN(aq) + FeCl3(aq) --> K3Fe(CN)6(aq) + 3KCl(aq)
2H2CrO4(aq) -->H2Cr2O7(aq) + H2O(l)
Hg2Cl2(s) + 5HNO3(aq) --> 2Hg(NO3)2(aq) + HNO2(aq) + 2HCl(aq) + H2O(l)
3H2O(l) + P4(s) + 3KOH(aq) --> 3KH2PO2(aq) + PH3(g)
H2Cr2O7(aq) + 3H2C2O4(aq) + 6HCl(aq) --> 2CrCl3(aq) + 6CO2(g) + 7H2O(l)
4Au(s) + 16KCN(aq) + 3O2(g) + 6H2O(l) --> 4KAu(CN)4(aq) + 12KOH(aq)
CuS(s) + 2AgNO3(aq) -->Cu(NO3)2(aq) + Ag2S(s)
2HNO3(aq) + CuO(s) --> Cu(NO3)2(aq) + H2O(l)
1 AnswerChemistry2 years agothe number of electrons transferred from the reducing agent to the oxidizing agent for the conventionally balanced equation (full reaction)?
Balance each of the following equations occuring in basic aqueous solution.
NH2OH + CO2 --> N2 + CO
S2- + MnO4- --> S + MnO2
Re + HPbO2- --> ReO4- + Pb
SnO22- + Bi(OH)3 --> Bi + SnO32-
1 AnswerChemistry2 years agowhat is the molarity of the S2O32- solution?
Thiosulfate ion, S2O32-, reacts with iodine in acidic solution to produce tetrathionate ion, S4O62-, and iodide ion .
If exactly 80.0 mL of S2O32- solution is required to react completely with 85.0 mL of 4.50×10-4 M I2 solution
1 AnswerChemistry2 years agowhat is the molarity of the oxalic acid solution?
Oxalic acid, H2C2O4, reacts with dichromate ion, in acidic solution to produce carbon dioxide and chromium(III) ion.
If exactly 80.0 mL of an oxalic acid solution is required to react completely with 85.0 mL of a 0.0500 M dichromate solution
2 AnswersChemistry2 years ago
Balance the following equations,using either the half-reaction method or the oxidation number method, and enter the coefficients?
The coefficients must be the smallest possible integers.
1 AnswerChemistry2 years agoCalculate S° for the reaction product in the equation shown below if ΔS° for the reaction is -134.0 J K-1?
C2H4(g) + Cl2(g) --> CH2ClCH2Cl(g)
S° (J K-1 mol-1) S° (J K-1 mol-1)
C2H4(g) 219 Cl2(g) 223
1 AnswerChemistry2 years agoIndicate how entropy of the system changes for each of the physical processes shown below?
Entropy increases, decreases, or no change???
evaporating
melting
diffusion
sublimation
mixing
2 AnswersChemistry2 years agoCalculate the standard entropy of vaporization (ΔS°vap) of C2Cl3F3(l). Answer to the nearest 0.1 J K-1 mol-1?
The standard enthalpy of vaporization for C2Cl3F3 is 146.79 J/g at its normal boiling point of 47.57°C.
1 AnswerChemistry2 years agoFor each of the following pairs of molecules, choose the one which has a higher boiling point:?
A) CH3COOH or B) C4H10
A) I2 or B) Br2
A) CH3OH or B) (CH3)2O
A) C2H5OH or B) C3H8
1 AnswerChemistry2 years agoFor each of the following pairs of molecular substances, predict which member of the pair would have the higher boiling point.?
A) N2 and B) NO
A) AsH3 and B) PH3
A) NH3 and B) PH3
A) Br2 and B) Cl2
A) H2O and B) H2S
A) F2 and B) Cl2
1 AnswerChemistry2 years agoCalculate the pH of a buffer solution containing a weak acid (concentration 0.46M) and its conjugate base (concentration 0.49M).?
The Ka for the weak acid is 6.10E-7.
1 AnswerChemistry2 years agoWhich has the least viscosity? CH3(CH2)3CH3 HOCH2CH2OH CH3CH2OH?
1 AnswerChemistry2 years ago
