(1.3)(Question 42 on page 40) Which of the following represent(s)' homogeneous mixture'? (b) (c) O (a) and (c) O (a) O (b) O (c) and (d) O (b), (c) and (d) 83 (d)
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- (1.3)Which of the following techniques can separate the homogeneous mixture of two liquids with different boiling points? O All of these O decanting O filtration O distillationWhich of the following will be homogeneous mixture? (A) All of them (B) N2 and Ar (C) C2H5OH and H2O (D) NH4Cl and H2O (E) C6H6 and C7H81.13 For each of the following molecules, determine the number of carbon atoms present and then determine the number of hydrogen atoms connected to each carbon atom: (a) *.8 (c) (b) (d) (e) .O: (f)
- 3.5 (a) and (b) please help!3. 4) Which substance is a mixture? (could be more than 1) (a) Gold. (b) Water. (c) Milk. (d) Fruit cake. (2) Which property of trinitrotoluene is most likely a chemical property? (a) yellow color (b) melting point is 80.1° C. (c) Explosive. (d) can generate 3.8 x 1014 KJ heat per gram TNT. (3) Which change is a chemical change? (a) The condensation of dew on a cold night. (b) A forest fire. (c) The smoothening of rocks by ocean waves. (d) paper rip into pieces.(7) question is in the photo below
- 2.6 is wrong ?A glass of lukewarm milk is suggested for people who cannot sleep. Milk at 52C can be characterized as lukewarm. What is the temperature of lukewarm milk in F? In K?(6) A group of students collected 125 empty aluminum cans to take to therecycling center. If 21 cans make 1.0 lb aluminum, how many liters ofaluminum (D=2.70 g/cm3) are obtained from the cans? (Example worked inclass)
- [3] e a: b: c: d: e: f: g: 1o4) ½N2(g) + 02(g)= NO2(g) Kc = 1.04 x 10° N2(g) + 202(g) = N204(g) Kc = 7.42 x 10-18 Calculate Kc for each of the following. (a) 2NO,(g)= N½(g) + 20,(g) (b) N2(g) + 202(g) = N;O«(g) (c) 2NO2(g) = N;O4(g)What is the mass of 3.30 × 10 ²³atoms of silver, Ag? (Sec. 8.4) (a) 0.549 g (b) 25.8 g (c) 59.1 g (d) 85.7 g (e) 197 g