TTU General Chemistry
Chem 1110 - Chapter 1: Chemistry and MeasurementPractice Quiz 41. The EPA emission standards limit each automobile exaust to 23.0 g of carbon monoxide (CO) per mile. In an average city there are 82,700 cars, each driven an average 13.5 miles/day. How much CO (in kg) can be legally discharged into the atmosphere each day?a) 48.7b) 2.45 x 105c) 2.57 x 104d) 141e) 3.5 x 1042. Of the following properties of sucrose, which ones are chemical properties?I. It dissolves in water.II. When treated with yeast it produces alcohol.III. It is a white solid.IV. It has a density of 1.587 g/cm3.V. Upon heating in air, it turns black and emits a caramel odor. a) I, IV, and Vb) I and IIc) II and Vd) I, II and IVe) III and IV3. Which branch of chemistry deals with determining the identity and composition of matter?a) analyticalb) organicc) physicald) biochemistrye) inorganic4. Which of the following processes are exothermic?I. Combustion of natural gas. II. Freezing water. III. Melting ice. IV. Boiling water. V. Condensing steam. a) III, IV and Vb) I, II, and IIIc) III and IVd) I, II and Ve) all of them5. Which of the following properties would not be useful in charecterizing a substance?a) densityb) shapec) colord) melting pointe) tendency to burn6) Which of the following statements is FALSE?a) Different mixtures of the same substance can have different compositions. b) Compounds are composed of two or more elements in fixed proportions. c) A solution is a homogeneous mixture. d) Elements cannot be decomposed into simpler substances by chemical means. e) A heterogeneous mixture has a constant composition throughout. 7. Which of the following materials is NOT a pure substance?a) ethyl alcoholb) saltc) aspirind) irone) cheese8. In Biblical times, volume was measured by the OMER and weight by the SHEKEL. Given the conversions below, calculate the density of gasoline (0.680 g/mL) in sheckels/omer.1.00 sheckel = 14.1 g 1.00 omer = 3.964 La) 12.2b) 82.2c) 38.0d) 191e) 0.2429. Nichrome is an alloy (mixture) commonly used to make heating elements. It is composed of 60% nickel, 24% iron and 16% chronium. If you have 2.15 g of nichrome wire, how much of each element do you have?a) 1.6g Ni, 0.31g Fe, 0.24g Crb) 1.6g Ni, 0.41g Fe, 0.14g Crc) 1.3g Ni, 0.52g Fe, 0.34g Crd) 1.2g Ni, 0.61g Fe, 0.14g Cre) 1.3g Ni, 0.41g Fe, 0.43g Cr10. The same amount of heat is added to a 25 g sample of each of the metals below. If they are all initially at 25oC, which will reach the highest temperature?a) nickel, msp.ht. = 0.444 J/goCb) beryllium, sp.ht. = 1.82c) calcium, sp.ht = 0.653d) copper, sp.ht = 0.385e) gold, sp.ht = 0.12911. The density of octane is 0.702 g/mL. What is the volume of 63.0 g of octane?a) 84.7 mLb) 89.7 mLc) 45.6 mLd) 22.5 mLe) 108 mL12. The statement that the total mass does not change in a chemical reaction is the Law of:a) Conservation of Matterb) Definite Proportionsc) Evolutiond) Greatest Simplicitye) Thermodynamics13. From the decomposition of an unknown solid, one obtains a gas and a new solid, both of which are pure substances. From just this information it can be said, without a doubt, that:a) one of the products is an elementb) neither product is an elementc) both products are elementsd) the original solid is not an element14.
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Which of the following properties do liquids and gases have in common?a) they expand slightly on heatingb) they will flowc) they are rigidd) they are easily compressede) they expand to fill their container15. The fact that compound calcium carbonate is made up of 40% calcium, 12% carbon, and 48% oxygen is an illustration of the Law of:a) Constant Compositionb) Conservation of Matter and Energyc) the Jungled) Multiple Proportionse) Transmutation