Quiz 1 Version A

Chapter 1 & 2 10/9/19

If you are sitting next to someone with the same version of the quiz both people will loose 1 point. On the ParScore form, you need to fill in your perm number, test version, and name. Failure to do any of these things will result in the loss of 1 point. Your perm number is placed and bubbled in under the “ID number.” Do not skip boxes or put in a hyphen; unused boxes should be left blank. Bubble in your test version (A) under the “test form.” If there is writing on your ParScore form other than your answers you will get a 0 on the quiz. Note: your ParScore form will not be returned to you, therefore, for your records, you may want to mark your answers on this sheet. Each question is worth 1.2 points.

1. What is the correct formula for chromium(VI) oxide? A) Cr6O B) Cr22O6 C) CrO6 D) CrO3 E) None of the above

2. Which of the following pairs of compounds can be used to illustrate the law of multiple proportions? A) H2O and HI B) CH4 and CO2 C) CaO and CaCl2 D) NO and NO2 E) None of the above

3. How many mm in 2.3×104 nm? A) 2.3×10-8 mm B) 2.3×10-5 mm C) 2.3×10-3 mm D) 2.3×10-2 mm E) None of the above

4. Select the group of symbols that would correctly complete the following statements, respectively. ___ is the heaviest noble gas.

___ is the transition metal that has 24 electrons as a 3+ ion.

___ is the halogen in the third period.

___ is the alkaline earth metal that has 18 electrons as a stable ion.

A) Ra, Sc, Br, K B) Rn, Co, Cl, Ca C) Ra, Co, Cl, K D) Rn, Cr, Br, Ca E) None of the above

5. Which of the following is not the correct name for the formula given? A) CoO cobalt(II) oxide B) NCl3 nitrogen trichloride C) CaSO4 calcium sulfite D) Cr2O3 chromium(III) oxide E) All of the above are correct

6. The following data was collected. If it is known that experiment 1 has the formula XY what is the formula of experiment 2.

Experiment Mass of X Mass of Y

1 2.55 g 12.75 g

2 1.70 g 4.25 g

A) XY3 B) XY2 C) X2Y D) X3Y E) None of the above

7. Which of the following statements is most like a scientific theory? A) A gas is composed of small particles in constant motion. B) When the pressure on a sample of oxygen gas is increased 10%, the volume of the gas

decreases 10%. C) The volume of a gas is inversely proportional to its pressure. D) A gas sample has a mass of 15.8 g and a volume of 10.5 liters.

8. When 3.0 L of hydrogen gas (H2) reacts with 1.0 L of nitrogen gas (N2), 2.0 L of gaseous product is formed and there is no excess reactants. All volumes of gases are measured at the same temperature and pressure. What is the formula of the product? A) N3H B) N2H3 C) NH D) NH4 E) None of the above

9. An element's most stable ion forms an ionic compound with chlorine having the formula XCl2. If the mass number of the ion is 24 and it has 10 electrons, what is the element and how many neutrons does it have? A) Ne, 14 neutrons B) O, 16 neutrons C) Mg, 12 neutrons D) Ne, 16 neutrons E) None of the above

10. Which among the following represent a set of isotopes? Atomic nuclei containing I. 20 protons and 20 neutrons. II. 21 protons and 19 neutrons. III. 22 neutrons and 18 protons. IV. 20 protons and 22 neutrons. V. 21 protons and 20 neutrons.

A) III, IV B) I, II, III C) I, V D) I, IV and II, V E) No isotopes are indicated.

Volume Conversion Factors

1 L = 103 cm3

1.000 gal = 3.785×103 cm3

1.00 ft3 = 2.83×10-2 m3

1.00 qt = 9.46×102 cm3

Energy Conversion Factors

1 cal = 4.184 J

1 eV = 1.62018×10-19 J

1 eV = 96.485 kJ·mol-1

1 C·V = 1 J

1 kWh = 3.600×103 kJ

1 L·atm = 101.325 J

Mass Conversion Factors

2.205 lb = 1.000 kg

1.000 lb = 453.6 g

1.000 oz = 28.35 g

1.000 ton = 907.2 kg

1 u = 1.6605×10-27 kg

Length Conversion Factors

1.094 yd = 1.000 m

0.3937 in = 1.000 cm

0.6214 mi = 1.000 km

1 Å = 10-10 m

Pressure Conversion Factors

1 atm = 1.01325×105 Pa

1 atm = 760 Torr

760 mm Hg

1 atm = 14.70 psi

1 bar = 105 Pa

Fundamental Constants

Avogadro's number NA 6.02214×1023

Gas constant R

8.3145

0.08206

Faraday's constant F 96,485

Planck's constant h 6.62608×10-34 J·s

Boltzmann’s constant k 1.38066×10-23

Speed of light c 2.9979246×108

Electron's mass

9.10939×10-31 kg

0.00054858 u

Electron's charge e -1.60218×10-19 C

Proton's mass

1.672623×10-27 kg

1.0073 u

Proton's charge 1.60218×10-19 C

Neutron's mass

1.672493×10-27 kg

1.0087 u

Hydrogen-1 mass 1.0078 u

Gas a b

He 0.034 0.0237

Ne 0.211 0.0171

Ar 1.35 0.0322

Kr 2.32 0.0398

Xe 4.19 0.0511

H2 0.244 0.0266

N2 1.39 0.0391

O2 1.36 0.0318

Cl2 6.49 0.0562

CO2 3.59 0.0427

CH4 2.25 0.0428

Avg. Bond Energy

H-H 432

H-Br 363

H-F 565

H-Cl 427

C-H 413

C-C 347

C-N 305

C-O 358

N-H 391

N-N 160

O-H 467

O-O 146

F-F 154

Cl-Cl 239

Br-Br 193

O=O 495

C=O* 745

CO 1072

NN 941

CN 891

*C=O (CO2) = 799