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Unformatted text preview: CHEM 1001 Fall 2007 Exam 1 - September 25, 2007 FormB Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What is the density of 96 mL of a liquid that has a mass of 90.5 g? A) 1.1 g/mL -Q>^. j p X (% ).94 g/mL V g p . O Q ^ T ) 186.5 g/mL fVO ^ T V V <3 L 0 D) 28.4 g/mL E) none of the above y ; _ ^y-\ 2) Which of the following subatomic particles has a mass of 1.67 x 10~ 2 7 kg? A) neutrons only B) protons only /CVprotons and neutrons i3) electrons only E) none of the above 1) 2) 3) M is a member of which family? alkaline earth metals B) halogens C) noble gases D) alkali metals E) none of the above 4) Which of the following is an example of an observation? A) Flammable objects contain phlogiston. On B) Reactions occur due to the transfer of electrons. ~TV\M When a can of soda pop is opened, a fizzing sound is he D) All matter is composed of small, indestructible particles called atoms. E) none of the above 5) The distance between the two hydrogen atoms in a molecule of water is O .O .QQQQQOJQQ172 m. Express this distance in scientific notation. A)1.72xlQl<>m B) 0.172 xlO -lm C) 17.2 x 10 9 m (^)).72 x 10- 10 m E) 1.72 xlO- 9 m 6) Which of the following statements about atoms is FALSE? A) An atom is the smallest identifiable unit of an element. B) Atoms compose all matter. C) Atoms are the basic building block of nature. pXAtoms are responsible for the sensation of smell. /na)^ll of the above statements are true. 3) 4) C\) 6) CHEM 1001 Fall 2007 Exam 1 - September 25, 2007 Form B 7) How many joules are there in a 255 calorie snack bar? A)1.07xl0 6 B)2.55x!05 4 (cj>1.07x 10 3 D) 6.09 x 104 E) none of the above 8) The definition of a scientific law is: 8) /- \ number of observations and predicting new ones....
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