55. Which of the gases in the graph has the largest molar mass? (All of the gase

Question

55. Which of the gases in the graph has the largest molar mass? (All of the gases are at the 62. 500 1000 100 2000 molecular speed (/secd (A) A (B) B (CCD)D 56. Which gas will have the highest rate of effusion? (A) Are) (B) CoA) (O HO) ()o4s) A balloon containing Xe is filled with the same number of atoms as another balloon containing He. Which statement is true for these balloons at the same temperature and pressure? 57. (A) The balloons have the same volume. (B) The balloons have the same mass of gas (C) The balloons contain gases with the same density (D) The balloons contain atoms with the same average speed A 1500 mL balloon is filled with He gas at 25-C with an atmospheric pressure of 1.04 atm. How many moles of 58, He are in the balloon? (A) 0.064 mol (C) 23 mol What is the oxidation number of manganese, Mn, in (B) 0.76 mo (D) 16 mol 59. Ca(Mnoh (A) +3 (B) (C +S (D) +7 Which statement is true for this oxidation-reduction 60. reaction? 2Pe.zr2Fe2+ +12 (A) ion is oxidized and its oxidation number decreases. (B) ion is oxidized and its oxidation number increases. (C) ion is reduced and its oxidation number decreases. (D) I ion is reduced and its oxidation number increase. 100 J of energy as heat is transferred to equal mass samples of four metals at the same initial temperature. Which metal reaches the highest temperature? (The specific heat of each metal is given in parentheses in unit 61. (A) aluminum (0.902)(B) copper (0.385) (C) gold (0.129) (D) iron (0.450)

Explanation / Answer

55. From the graph,

highest molar mass is of,

(A) A

speed is inversely proportional to molar mass

56. gas with highest rate of effusion is (one with lowest molar mass),

(C) H2O(g)

57. True statement,

(A) The balloons have the same volume.

58. moles of He gas = PV/nR = 1.04 atm x 1.5 L/0.0821 L.atm/K.mol x (25oc + 273)K = 0.064 mol

(A) 0.064 mol

59. Oxidation number of Mn in Ca(MnO4)2 is,

(D) +7

MnO4-

Mn = -1+8 = +7

60. True statement,

(A) I- is oxidized and its oxidation number decreases

61. If 100 J ios heat is supplied, the metal to reacch highest temperature first would be one with lowest specific heat,

dT is inversely proportional to specific heat

(C) gold

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.