Test 2

Use Diagram 1. If aluminum forms a compound with this polyatomic ion, how many cations and how many anions are shown in the empirical formula for the compound? a. 3 cations, 1 anion b. 1 cation, 1 anion c. 1 cation, 3 anions d. 3 cations, 3 anions

a. 3 cations, 1 anion

How many carbon atoms are in 5Al2(C2O4)3? a. 30 b. 2 c. 6 d. 3 e. 5

a. 30

How many electrons are shared in a triple bond? a. 6 b. 8 c. 2 d. 4

a. 6

How many grams of copper are in the 25.0 g sample of CuSO4? a. 9.95 g copper b. 995 g copper c. 8.33 g copper d. 0.628 g copper

a. 9.95 g copper

What is the formula for copper (II) chloride? a. Cu2Cl b. Cu(ClO3)2 c. Cu2ClO3 d. CuCl2

a. Cu2Cl

Use Statement 7. Which of the following chemicals is a reactant? a. Na2SiO3 b. NaF c. H2O d. H2SiF6

a. Na2SiO3

Use Statement 6. What type of bonding occurs in CH2O? a. covalent b. ionic

a. covalent

The correct name for N2S4 is: a. dinitrogen tetrasulfide b. tetrasulfur dinitride c. tetrasulfodinitrogen d. dinitrogen disulfide

a. dinitrogen tetrasulfide

A cation always: a. has a positive charge b. has a negative charge c. forms covalent bonds d. contains a metal and a nonmetal e. contains a group of two or more atoms with a negative charge

a. has a positive charge

Use Statement 2. What is the best description of the representative particle of C3H8? a. molecule b. diatomic molecule c. formula unit d. atom

a. molecule

Use Statement 6. The molecule CH2O is: a. polar b. nonpolar

a. polar

Use Diagram 4. Classify both the bonds and the molecules itself: a. polar and nonpolar bonds, polar molecule b. nonpolar bonds, nonpolar molecule c. nonpolar bonds, polar molecule d. polar and nonpolar bonds, nonpolar molecule

a. polar and nonpolar bonds, polar molecule

Use Diagram 1. What is the bond angle around the carbon atom that is connected to hydrogen? a. 180 degrees b. 109.5 degrees c. 90 degrees d. 120 degrees

b. 109.5 degrees

What is the sum of the coefficients when the following equation is balanced? ______KOH + ______Co3(PO4)2 --> ______K3PO4 + ______Co(OH)2 a. 16 b. 12 c. 13 d. 8

b. 12

Use Statement 6. How many lone pairs are in the Lewis dot Structure of CH2O? a. 3 b. 2 c. 1 d. 4

b. 2

What is the sum of the coefficients when the following equation is balanced? ______NaClO3 --> ______NaCl + ______O2 a. 12 b. 7 c. 4 d. 3

b. 7

The formula for the binary ionic compound of barium and sulfur is: a. Ba2S3 b. BaS c. Ba2S d. BaS2

b. BaS

Which of the following formula and name pairs is/are correct? I. SO4^-2, sulfate II. PO4^-2, phosphate III. NO4^-1, nitrate IV. CO3^-2, carbonate V. ClO4^-1, chlorate a. III, IV, and V b. I and IV c. I, II, and IV d. II, III, and V

b. I and IV

Which of the following is NOT the correct way to write the element in a chemical reaction? a. Fr b. Ne2 c. C d. I2

b. Ne2

What is the correct formula for the phosphide ion? a. P b. P^-3 c. P^+3 d. P^+2

b. P^-3

Use Diagram 1. What is the name of this ion? a. carbonate b. acetate c. formate d. oxalate

b. acetate

Which of the following pairs is wrong? a. carbonate, CO3^-2 b. acetate, C2HO2^-2 c. hydroxide, OH^-1 d. iron (III), Fe^+3

b. acetate, C2HO2^-2

The octet rule says that: a. all of the main group elements have 8 valence electrons. b. atoms lose, gain, or share valence electrons to have 8 valence electrons. c. the noble gases react with other compounds to get 8 valence electrons. d. all of the shells in an atom hold a maximum of 8 electrons. e. all of the noble gases have 8 total electrons.

b. atoms lose, gain, or share valence electrons to have 8 valence electrons.

The correct name for C4H10 is: a. propane b. butane c. ethane d. methane

b. butane

Which of the following pairs is wrong for molecular nomenclature? a. di, two b. quadra, four c. penta, five d. deca, ten

b. quadra, four

Use Statement 6. What types of bonds are in the Lewis structure of CH2O? a. double bonds only b. single and double bonds c. double and triple bonds d. single bonds only

b. single and double bonds

Use Diagram 1. What is the shape around the carbon atom that is connected to oxygens? a. tetrahedral b. trigonal planar c. square planar d. linear

b. trigonal planar

Use Statement 6. How many electrons are shown in the Lewis dot structure of CH2O? a. 20 b. 3 c. 12 d. 8

c. 12

Use Statement 7. If 1.50 X 10^24 molecules of HF react, how many grams of water are produced? a. 44.9 g b. 1.01 X 10^25 g c. 16.8 g d. 50.5 g

c. 16.8 g

Use Statement 7. Calculate the molar mass of water. a. 54 g b. 16 g c. 18 g d. 17 g

c. 18 g

Use Statement 2. What is the mass of this sample of C3H8? a. 0.892 g b. 880 g c. 39.3 g d. 10.2 g

c. 39.3 g

Use Diagram 1. How many electron domains are around the carbon atom that is connected to hydrogens? a. 3 b. 2 c. 4 d. 1

c. 4

Use Statement 2. What is the molar mass of C3H8? a. 13 b. 39 c. 44 d. 104

c. 44

When a metal forms a bond with a nonmetal, which of the following are true? I. An ionic bond is formed. II. Electrons are transferred. III. A molecular compound is formed. a. I only b. II and III c. I and II d. II only

c. I and II

Use Statement 5. Which of the following show only a formula? I. N2(g) II. 2NH3(g) --> N2(g) + 3H2(g) III. NH3(g) IV. N2(g) + 3H2(g) --> 2NH3(g) a. II and IV b. III only c. I and III d. IV only

c. I and III

Use Diagram 3. Which of these shapes are used for substances with 3 electron domains? a. IV only b. II and IV c. I only d. I and IV

c. I only

Use Statement 2. How many moles are in this sample of C3H8? a. 1.12 moles b. 4.00 moles c. 0.455 moles d. 0.893 moles

d. 0.893 moles

Use Statement 7. If 2.50 moles of hydrofluoric acid react, how many grams of water are produced? a. 18.0 g b. 45.0 g c. 5.63 g d. 16.9 g

d. 16.9 g

Use Statement 7. If 1 mole of sodium silicate reacts, how many moles of sodium fluoride are produced? a. 3 b. 8 c. 1 d. 2

d. 2

What is the sum of the coefficients when the following equation is balanced? ______Ag2S --> ______Ag + ______S8 a. 8 b. 3 c. 32 d. 25

d. 25

Use Statement 8. What is the percent by mass of copper in CuSO4? a. 20.1% b. 57.0% c. 89.2% d. 39.8%

d. 39.8%

Use Statement 2. How many representative particles are in this sample of C3H8? a. 1.20 X 10^25 particles b. 2.74 X 10^23 particles c. 0.893 particles d. 5.38 X 10^23 particles

d. 5.38 X 10^23 particles

The formula for the binary ionic compound of aluminum and sulfur is: a. Al2S b. AlS2 c. AlS d. Al2S3

d. Al2S3

Use Diagram 3. Which of these shapes has bond angles of 109.5 degrees? a. I and IV b. I only c. I and III d. II and IV

d. II and IV

Which of the following statements about balanced chemical equations are FALSE? I. A balanced chemical equation contains the same number of atoms of a given element on both sides of the equation. II. The process of balancing requires you to change the subscripts in each chemical formula until the equation is balanced. III. A coefficient applies to all of the elements in the formula that follows the coefficient. IV. A plus sign (+) separates reactants from products, and an arrow (-->) separates reactants from other reactants, and products from other products a. I, II. and III b. I and III c. I, II, and III d. II and IV

d. II, and IV

What is the symbol for the ion with 19 protons and 18 electrons? a. K^-1 b. Ar^+1 c. Cl^-1 d. K^+1

d. K^+1

Use Statement 5. Which chemical(s) is/are the product(s)? a. N2 and H2 b. H2 only c. N2 only d. NH3 only

d. NH3 only

Which of the following elements has the smallest electronegativity? a. Cl b. Ti c. As d. Sr

d. Sr

Use Diagram 1. What is the formula of this ion? a. C2H3O2 b. CH3COO^-1 c. C2H3O2^-1 d. both b and c

d. both b and c

What is the name of CuSO4? a. copper sulfate b. copper sulfide c. copper (II) sulfide d. copper (II) sulfate

d. copper (II) sulfate

The correct name for I2O5 is: a. diiodopentoxide b. iridium pentoxide c. pentaoxodiiodine d. diiodine pentoxide

d. diiodine pentoxide

To form an ion, an oxygen atom: a. loses one electron. b. gains one electron. c. loses two electrons. d. gains two electrons.

d. gains two electrons.

Use Diagram 9. Classify both the bonds and the molecule itself. a. nonpolar bonds, polar molecule b. polar bonds, polar molecule c. nonpolar bonds, nonpolar molecule d. polar bonds, nonpolar molecule

d. polar bonds, nonpolar molecule

Use Statement 2. What is the name of C3H8? a. butane b. tricarbon tetrahydride c. carbon hydride d. propane

d. propane

Use Diagram 3. Structure IV is called: a. bent b. linear c. tetrahedral d. trigonal planar e. trigonal pyramidal

e. trigonal pyramidal