1307EX1Atest

# 1307EX1Atest - Equations: o K = oC + 273.15 o F = 1.8 (oC)...

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Equations: o K = o C + 273.15 o F = 1.8 ( o C) + 32 Constant: Density of water: 1.00 g/mL Coversions: 1 mile = 1.609 km 1 hour = 60 minutes 1 minute = 60 seconds The space below is designated for scratching purpose.

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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. A bowl of mint choc chip ice cream is best described as (a) An elemental substance (b) a homogeneous mixture (c) a heterogeneous mixture (d) a compound (e) a chemical reaction between water and milk 2. Which of these is the correct formula for potassium phosphate? (a) KPO 4 (b) K 2 PO 4 (c) K 3 PO 4 (d) K(PO 4 ) 3 (e) K 3 P 3. Determine the solution to this problem with correct number of significant figures. (12.7 + 0.23) ÷ 23.42 (a) 0.6 (b) 0.55 (c) 0.552 (d) 0.5521 (e) 0.55209 4. Identify the spectator ions in this reaction. BaCl 2 (aq) + ZnSO 4 (aq) (a) Zn 2+ , Cl - (b) Ba 2+ , Cl - (c) Zn 2+ , SO 4 2- (d) Ba 2+ , SO 4 2- (e) Zn 2+ , Ba 2+ 5. Which of these is the lowest temperature? (a) 37 o C (b) 54 o F (c) 313 K (d) B and C (e) All are equal 6. What is the coefficient in front of sodium hydroxide when the equation is balanced? S (s) + O 2 (g) + NaOH (aq) Na 2 SO 4 (aq) + H 2 O (l) (a) 1 (b) 2 (c) 3 (d) 4 (e) 5
7. Identify the element X 35 17 . (a) bromine (b) chlorine (c) argon (d) tellurium (Te) (e) silver (Ag) 8. How many electrons are there in a Sn 2+ ion? (a) 48 (b) 50 (c) 52 (d) 81 (e) 69 9. Which of the following is the empirical formula for hexane, C 6 H 14 ? (a) C 12 H 28 (b) C 6 H 14 (c) C 3 H 7 (d) CH 2.3 (e) C 0.43 H 10. Choose correct chemical name for Fe 2 S 3 . (a)

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## This note was uploaded on 04/07/2008 for the course CHEM 1307 taught by Professor Li during the Spring '08 term at Texas Tech.

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1307EX1Atest - Equations: o K = oC + 273.15 o F = 1.8 (oC)...

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