AccelePrep for the ACT Test 2nd Edition Student Text

P OWER U P ! T HE E XCLUSIVE C AMBRIDGE S AMPLE E XAM • 287

7. Which of the following graphs most accurately †‡’‹…–• –Š‡ †‡•‹–› ‘ˆ –Š‡ ϐ‹”•– –‡ ƒŽƒ‡• ƒ• ƒ function of the number of atoms in the carbon „ƒ…„‘‡ ‹ –Š‡ ƒŽƒ‡•ǫ A.

1. According to the table, as the number of carbon atoms in the backbone of the alkane molecule increases, the: A. molecular mass decreases. B. boiling point increases. C. melting point decreases. D. density at 290°C decreases. 2. Which of the following is the structural formula ˆ‘” „—–ƒ‡ǫ F. CH 3 —CH 3 —CH 3 —CH 3 G. CH 2 —CH 3 —CH 3 —CH 2 H. CH 3 —CH 2 —CH 2 —CH 3 J. CH 12 —CH 10 —CH 10 —CH 12 3. Considering the alkanes listed, if alkane X has a higher boiling point than alkane Y, then alkane X also has: Ǥ ƒ Ž‘™‡” ϐŽƒ•Š ’‘‹–Ǥ B. a lower molecular mass. C. more carbon atoms. D. fewer hydrogen atoms. 4. The alkane undecane has a backbone of 11 carbon atoms. What is the approximate molecular mass of the compound expressed in ƒ–‘‹…ƒ•• —‹–•ǫ F. 154 G. 155 H. 156 J. 157 5. The alkane dodecane has a backbone of 12 carbon atoms. The compound has how many Š›†”‘‰‡ ƒ–‘•ǫ A. 14 B. 24 C. 26 D. 28 6. Which of the following is not a gas at room –‡’‡”ƒ–—”‡ǫ F. Methane G. Ethane H. Butane J. Hexane

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