Practice_Exam_1

Practice_Exam_1 - C105 Practice Exam 1 (You should take...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
C105 Practice Exam 1 (You should take this practice exam under real exam conditions, i.e. close-book, close- notes, with time limit, without any outside help. Simply memorizing how to do each problem on the practice exam without understanding of the concepts will not help you get ready for the actual exam. The actual exam 1 will contain 40 multiple choice questions.) 1. When the equation below is properly balanced, what is the coefficient of barium chloride (BaCl 2 )? AlCl 3 (aq) + Ba 3 (PO 4 ) 2 (aq) ± AlPO 4 (s) + BaCl 2 (aq) A. 2 B. 3 C. 4 D. 6 2. When the equation below is properly balanced, what is the sum of all the coefficients? Al(NO 3 ) 3 + H 2 SO 4 ± Al 2 (SO 4 ) 3 + HNO 3 A. 6 B. 9 C. 11 D. 12 3. Cr in nature is a mixture of four isotopes Mass Natural Abundance 49.946 4.35% 51.941 83.79% 52.941 9.50% 53.939 2.36% Calculate the (average) atomic mass of Cr. A. 49.94 B. 50.00 C. 51.32 D. 52.00 E. 53.17 4. Which of the following matched pairs of name and formula has an error? A. Potassium hypochlorite, KClO B. Copper(II) oxide, Cu 2 O C. Tetraantimony hexaoxide, Sb 4 O 6 D. Acetic acid, CH 3 COOH 5. Which gas does not exist as a diatomic molecule at room temperature? A. oxygen B. nitrogen C. chlorine D. neon E. hydrogen
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The answer to the following calculation, rounded to the correct significant figures, is (33.41)/(1.123+9.2) A. 3.236 B. 3 C. 3.2 D. 3.24 7. A combination of sand, salt, and water is an example of a A. homogeneous mixture. B. heterogeneous mixture. C. compound. D. pure substance. 8. If 5.76 x 10 13 neon atoms (spherical) were laid in a straight line, each touching the next, the line would measure 2.54 miles. What is the diameter of a neon atom in Å? (1 Å = 1.0 x 10 -1 nm; 1 mile = 1.6093 km) A. 0.62 B. 0.71 C. 0.92 D. 1.44 9. An unknown element X has a pre-superscript of 81 and a pre-subscript of 34. How many neutrons does it contain and what is its identity? A. selenium and 47 neutrons B. selenium and 81 neutrons C. thallium and 34 neutrons D. thallium and 34 neutrons E. rubidium and 34 neutrons 10. If an unknown element X forms the sulfide, X 2 S, the formula for the phosphate of the element would be A. XPO 4 B. X(PO 4 ) 2 C. X 2 PO 4 D. X 3 PO 4 11. Express 39.34 yd 2 in cm 2 given that 1 m = 1.0936 yd A. 0.6417 B. 1.728 x 10 4 C. 1.835 x 10 5 D. 3.289 x 10 5 E. 7.632 x 10 6 12. Which one of the following is incorrectly written? A. CaCO
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/05/2010 for the course BIO 101 taught by Professor Vaughan during the Spring '10 term at IUPUI.

Page1 / 10

Practice_Exam_1 - C105 Practice Exam 1 (You should take...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online