A chemical bond resulting from the electrostatic attraction between positive and negative ions is called a(n)a) covalent bondb) ionic bond c) charged bondd) dipole bond
b) ionic bond
The chemical bond formed when two atoms share electrons is called a(n)a) ionic bondb) orbital bond c) lewis structure d) covalent bond
d) covalent bond
If two covalently bonded atoms are identical, the bond isa) nonpolar covalent b) polar covalent c) nonionic d) coordinate covalent
a) nonpolar covalent
If the atoms that share electrons have an unequal attraction for the electrons, the bond is calleda) nonpolarb) polarc) ionic d) dipolar
b) polar
The B--F bond in BF3 (electronegativity for B is 2.0; electronegativity for F is 4.0) is a) polar covalent b) ionic c) nonpolar covalent d) pure covalent
b) ionic
In metallic bonds, the mobile electrons surrounding the positive ions are called a(n)a) Lewis Structureb) electron seac) electron cloud d) dipole
b) electron sea
The concept that electrostatic repulsion between electron pairs surrounding an atom causes these pairs to be separated as far as possible is the foundation of a) VSEPR theoryb) the hybridization modelc) the electron-sea modeld) Lewis theory
a) VSEPR theory
What is the formula for the compound formed by calcium ions and chloride ions?a) CaClb) Ca2Clc) CaCl3d) CaCl2
d) CaCl2
What is the formula for the compound formed by lead (II) ions and chromate ions?a) PbCrO4b) Pb2CrO4c) Pb2(CrO4)3d) Pb(CrO4)2
a) PbCrO4
Name the compound Ni(ClO3)2a) nickel chlorateb) nickel chloride c) nickel chlorite d) nickel peroxide
a) nickel chlorate
Name the compound Fe(NO3)2a) iron(II) nitrateb) iron (II) nitrite c) ferric nitrate d) ferrous nitride
b) iron (II) nitrite
Using the stock system, name the compound PbOa) plumbous oxide b) lead oxide c) potassium oxide d) lead (II) oxide
d) lead (II) oxide
Name the compound N2O3a) dinitrogen oxideb) nitrogen trioxide c) nitric oxided) dinitrogen trioxide
d) dinitrogen trioxide
What is the formula for nitrogen trifluoride?a) NiF3b) NF3c) N3Fd) Ni3F
b) NF3
What is the oxidation number of magnesinum in MgO. a) -1b) 0c) +1d) +2
d) +2
What is the formula mass of ethyl alcohol, C2H5OH?a) 30. 328b) 33. 271c) 45. 061d) 46. 069
d) 46. 069
The molar mass of CCl4 is 153.81 g/mol. How many grams CCl4 are needed to have 5.000 mol?a) 5gb) 30.76c) 769. 0 gd) 796. 05 g
c) 769. 0 g
The molar mass of NH3 is 17. 03 g/mol. How many moles of NH3 are present in 107.1 g? a) 0. 1623 molb) 3. 614 molc) 6. 289 mold) 107. 1 mol
c) 6. 289 mol
How many OH- ions are present in 3.00 mol of Ca(OH)2?a) 3.00b) 6.00c) 3.61 x 10^24d) 2.06 x 10^23
c) 3.61 x 10^24
What is the percentage composition of chlorine NaCl?a) 35. 45%b) 50%c) 50.7 %d) 64. 5%
c) 50.7 %
The molecular formula for vitamin C is C6H8O6. What is the empirical formula?a) CHOb) CH2Oc) C3H4O3d) C2H4O2
c) C3H4O3
A compound's empirical formula is N2O5. If the formula mass is 108 amu, what is the molecular formula?a) N2O5b) N4O10c) NO3d) N2O4
a) N2O5
To balance a chemical equation, it may be necessary to adjust the a) coefficients b) subscripts c) formulas of the productsd) number of products
a) coefficients
When the equation Fe3O4 + Al --> Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?a) 3b) 4c) 6d) 9
d. 9
In what kind of reaction do two or more substances combine to form a new compound?a) decomposition reactionb) ionic reactionc) double-reaction reactiond) synthesis reaction
d) synthesis reaction
What is the balanced equation when aluminum reacts with copper (II) sulfate?a) Al + Cu2S -> Al2S + Cub) 2Al + 3CuSO4 -> Al2(SO4)3 + 3Cuc) Al + CuSO4 -> AlSO4 + Cud) 2 Al + Cu2SO4 -> Al2SO4 + 2Cu
b) 2Al + 3CuSO4 -> Al2(SO4)3 + 3C
For the reaction 2Na + 2H2O → 2NaOH + H2, how many grams of sodium hydroxide are produced from 3.0 mol of water?a) 40. gb) 80. gc) 120 gd) 240 g
c) 120 g
for the reaction Cl2 + 2KBr --> 2KCl + Br2, how many grams of potassium chloride can be produced from 300 g each of chlorine and potassium bromide?a) 0. 119 molb) 0. 236 molc) 0. 581 mol d) 1.00 mol
d) 1.00 mol
For the reaction 2Na + 2H2O -> 2NaOH + H2, how many grams of hydrogen are produced if 120 g of sodium and 80 g of water are available?a) 4.5 gb) 44 gc) 80 gd) 200 g
a) 4.5 g
What is the electron configuration of Vanadium
1s^2 2s^2 2p^6 3p^6 4s^2 3d^3
sodium phosphate
Na3PO4
aluminum sulphate
Al2 (SO4)3
Magnesium carbonate
MgCO3
P4O10
Phosphorus pentoxide
CO
carbon monoxide
MgS
magnesium sulfide
Na2S
nitrogen sulfide
SrCO3
strontium carbonate
What is the electronic configuration of the sodium ion?
1s^2 2s^2 2p^6 3s^1
What type of ions have names ending in -ide?
anions