Question 1: Consider the molecule ammonia (NH3), which has a ∆Hvap of 24.7 kJ/mol. a. Draw the Lewis structure of ammonia. b. What is the strongest intermolecular force present in ammonia? c. At -38 °C the Pvap for ammonia is 597 torr. What is Pvap at -73 °C?
Question 1: Consider the molecule ammonia (NH3), which has a ∆Hvap of 24.7 kJ/mol. a. Draw...
Which substance below has the weakest intermolecular forces? DX2, ∆ Hvap= 26.2 kJ/mol C3X2, ∆ Hvap= 33.2 kJ/mol BY2, ∆ Hvap= 26.7 kJ/mol A2X, ∆ Hvap= 44.3 kJ/mol EY3, ∆ Hvap= 22.2 kJ/mol
QUESTION 11 The ammonia molecule, NH3, can be accurately described by which of the following statements? O None of the other statements accurately describe the ammonia molecule. O Ammonia has a trigonal planar molecular geometry. O The hydrogens in ammonia have a partial negative charge The nitrogen atom of ammonia contains two lone pairs. The ammonia molecule has no net dipole. QUESTION 12 Which of the following bonds is the strongest? O O=O bond energy = 498 kJ/ mol O...
Ammonia (NH3) is a covalently bonded molecule, made up of three N-H bonds. For this question, you should use the following values: H-N bond energy = 388 kJ mol-1 Atomic mass of nitrogen =14.007 g mol-1 Atomic mass of hydrogen =1.008 g mol-1 (a) Calculate the molecular mass of NH3 . Give your answer in g mol-1 to three significant figures. (2 marks) (b) Calculate the number of moles in 76 grammes (g) of NH3 . Give your answer to...
14 Which of the following is true if a molecule possesses lone pairs on the central atom but is not hydrogen bonded? (A) the molecule will have a hydrogen bonded directly to an N, O, or F (B) the molecule will be nonpolar (C) the molecule will be an ionic crystal lattice structure where there are strong clectrostatic (D) the molecule will be polar 15 A substance with strong intermolecular forces will have (A) low boiling point (B) high reactivity...
Consider the molecule below: o=s=o: Select ALL the intermolecular forces that are expected to be present between two of these molecules. Select as many answers as are applicable, however points will be deducted for incorrect guesses. Select one or more: Dispersion forces Dipole/dipole forces Hydrogen bonding Check What amount of thermal energy (in kJ) is required to convert 136 g of ice at -16 °C completely to water vapour at 217 °C? The melting point of water is 0°C and...
1. The simplest ammonia formation is from nitrogen and hydrogen. Consider the reversible reaction N2(g) + 3H2(g) → 2NH3(g) The standard enthaply and Gibbs free energy of formation one mole NH3 is ∆H◦ m = −46.11 kJ mol−1 and ∆G◦ m = −16.78 kJ mol−1 . (a) What is equilibrium constant at standard condition (25°C and 1 atm)? (b) What is equilibrium constant at 60°C and 1 atm? (c) What is the Gibbs free-energy change relative to that under standard...
Question 16 (1 point) Which substance below has the weakest intermolecular forces? BY2, AHvap=29.2 kJ/mol A2X, AHvap= 41.2 kJ/mol C3X2, AHvap= 33.2 kJ/mol DX2, AHvap= 25.2 kJ/mol EY3, AHvap= 20.5 kJ/mol Question 3 (1 point) The spheres below represent atoms of Si, Ge,C, and Sn (not necessarily in that order). r=110 pm - 140 pm T-75 pm (a) r=120 pm (c) Which one of these spheres represents an atom of Si? sphere (c) sphere (b) sphere (a) sphere (d) KYC...
1.Given a solution in which [Cu2+] = 0.20 mol/L and [NH3] = 1.40 mol/L, what is the equilibrium concentration of free Cu2+? The complex Cu(NH3)42+ has Kf = 5.0 X 1013. The answer to the question is 3.1 X 10 -14 I just need how to do it with the work shown. 2. You titrate a 20.00 mL sample of ammonia (Kb = 1.8 X 10-5) to the equivalence point using 10.00 mL of .20 M HCl solution. What is...
9. Draw all of the possible hydrogen bonds between the following molecule and water molecules. Indicate the hydrogen bonds with dotted lines. :N-CEN: H 10. Polar molecules can contain more than one type of attractive force. Fill in the following table answering the question "Is this attractive force present between molecules of the given compound?" Write yes or no for each force. Molecule Ionic Attraction H-Bond Dipole-Dipole London CHCl3 CH3OH NH2 65- *NH3-C-COO 11. For each of the following pairs...
Knut Sickle Question 16 2 pts :CI: Ge: :CI: :CI: Consider the Lewis structure draw above and select the answer which best describes what's wrong with it. O chlorine atoms have too many lone pairs the molecule has too many electrons Hide O nothing the structure is drawn correctly Proctorio is sharing your screen. Stop sharing germanium atoms do not have enough lone pairs DELL Principles of Chemistry weak Bas: NH3 sciples of Chemistry JK acid : HE CH3 Coolt...