University of New Haven Tagliatela College of Engineering Department of Chemistr

Question

University of New Haven Tagliatela College of Engineering Department of Chemistry and Chemical Engineering 2016. Final E Dr. M ary Khalili Student Name: Instructions: Answer all questions in the spaces provided or choose the correct answer whichever is applicable. YOU MUST PEN NOT PENCIL For multiple choice questions, circle the correct answer. Show work to get credit for open end questions, no credir is given for answers with no work even if the answer is correct 1) Which of the following is an example of a homogeneous mixture? A) sand mixed with oil B) salt dissolved in water C) table sugar D) gasoline mixed with water E) ball bearings in a box 2) A solution has a density of 1.22 gmL. What volume of the solution has a mass of 48.2 g A) 0.00253 mL B) 58.8 mL. C) 39.5 mL. D) 49.4 mL E) 1.22 mL. 3) Which of the following is a characteristic of the modem periodic table? A) A group is a horizontal row on the periodic table. B) A period is a column on the periodic table. properties. C) The elements in each group have similar chemical D) The B groups contain the representative elements. 4) Chromium is an example of an element that is a A) transition element B) nonmetal C) metalloid D) gas element E) representative

Explanation / Answer

Q.No - 1(B)

Salt dissolved in water to make homogeneous mixture.

Q.No-02

Given , density = 1.22 g/ml

Mass = 48.2 g

We know, Volume = Mass / density = 48.2 g / 1.22 g/ml = 39.5 ml

Answer is (c)

Q.No-03 (c)

Elements present in the same group show same physical and chemical properties.

Q.No-04 (A) Transition element because outer shell configuration is 4S13d5

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