Ch1&2 Practice Question F18 KEY PDF

Preview

Summary

Download Ch1&2 Practice Question F18 KEY PDF

Description

CHAPTER 1 AND 2 PRACTICE QUESTIONS KEY 1.

Generally, observed behavior that can be formulated into a statement, sometimes mathematical in nature, is called a(n) a) observation b) measurement c) theory d) law e) experiment

2.

Which of the following statements are incorrect? a) The state of matter for an object that has a definite volume but not a definite shape is a liquid state b) The state of matter for an object that has both definite volume and definite shape is solid state c) The state of matter for an object that has a definite shape and is highly compressible is gaseous state d) The state of matter for an object that has no definite volume and takes the shape of its container is gaseous state e) The state of matter for an object that is rigid is solid state

3.

An example of a pure substance is a) elements b) compounds c) pure water d) carbon dioxide e) all of these

4.

Which of the following are incorrectly classified? Substance Classification a) chicken noodle soup heterogeneous mixture b) powerade homogeneous mixture c) air inside a balloon heterogeneous mixture d) diamond (C) element e) baking soda (NaHCO3) compound

5.

Which of the following metric relationships is incorrect? a) 1 microliter = 10–6 liters b) 1 gram = 103 kilograms c) 103 milliliters = 1 liter d) 1 gram = 102 centigrams e) 10 decimeters = 1 meter

6.

Calculate the volume of silver metal that weighs exactly 2.50 kg. The density of silver is 10.5 g/cm 3. a) 0.238 mL b) 238 mL c) 26.25 mL d) 4.20 mL e) 0.00420 mL

7.

Select the correct answer below given the following numbers. 4250600 0.0560030 Significant Figures Scientific Notation Significant Figures Scientific Notation a) 5 4.2506 x 106 5 5.6003 x 10-2 6 b) 4 4.251 x 10 8 5.60030 x 10-2 c) 5 4.2506 x 106 6 5.60030 x 10-2 4 d) 5 4.2506 x 10 3 5.63 x 10-2 6 e) 6 4.25060 x 10 7 5.6003 x 10-2

8.

424 Kelvin equals a) b) c) d) e)

8.

151 °F 273 °F 697 °F 151 °C 697 °C

4.2x1012 ng is equal to a) b) c) d) e)

10.

4.2 kg 4200 kg 4.2 x 1014 kg 4.2 x 1017 kg 0.042 kg

Accuracy refers to ________. a) b) c) d) e)

11.

Which one of the following statements about the atomic structure of at atom is false? I. An atom is mostly empty space. II. Almost all of the mass of the atom is concentrated in the nucleus. III. The protons and neutrons in the nucleus are very tightly packed. IV. The number of protons and neutrons is always the same for all neutral atoms of that element. V. Ions are formed by adding or removing either protons or electrons. a) b) c) d) e)

12.

how close a measured number is to zero how close a measured number is to the calculated value how close a measured number is to other measured numbers how close a measured number is to the true value how close a measured number is to infinity

I, II, and III only IV and V only V only I and V only All statements are true, no statements are false.

There are ________ electrons, ________ protons, and ________ neutrons in an isotope of sulfide ion-33. a) b) c) d) e)

16, 16, 16 18, 16, 16 16, 17, 18 18, 16, 17 16, 16, 18

13.

Which one of the following is not one of the postulates of Dalton's atomic theory? a) Atoms are composed of protons, neutrons, and electrons. b) All atoms of a given element are identical; the atoms of different elements are different and have different properties. c) Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions. d) Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms. e) Each element is composed of extremely small particles called atoms.

14.

The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is ________ amu. a) b) c) d) e)

219.7 220.4 220.42 218.5 221.0

Isotope Abundance X 74.22 220 X 12.78 218 X 13.00 221

Mass 220.9 220.0 218.1

15.

Which of the following pairs of compounds can be used to illustrate the law of multiple proportions? a) NH4 and NH4Cl b) ZnO2 and ZnCl2 c) H2O and HCl d) NO and NO2 e) CH4 and CO2

16.

Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties? a) H, Li b) Cs, Ba c) Ca, Sr d) Ga, Ge e) C, O

17.

How many oxygen atoms are there in 4 formula units of Al2(CO3)3? a) 9 b) 24 c) 36

18.

The correct name for LiCl is a) lithium monochloride b) lithium(I) chloride c) monolithium chloride d) lithium chloride e) monolithium monochloride

19.

All of the following are in aqueous solution. Which is incorrectly named? a) HC2H3O2, acetic acid b) HBr, bromic acid c) H2SO3, sulfurous acid d) HNO2, nitrous acid e) HClO3, chloric acid

20.

Which of the following pairs is incorrect? a) NH4Br, ammonium bromide b) K2CO3, potassium carbonate c) BaPO4, barium phosphate d) CuCl, copper(I) chloride e) MnO2, manganese(IV) oxide

d)

13

e)

39...