chem test prep

In a lewis structure, a dash represents

a shared pair of electrons

The salts NaCl and CaCl2

are held together by ionic bonds

the weak intermolecular forces resulting from polar molecules are called

dipole dipole forces

you can estimate the degree to which a bond between two atoms is ionic or covalent by calculating the

difference in the atoms electronegativities

metals are malleable because when struck, one plane of metal atoms

can slide past another plane without breaking bonds

which of these is responsible for the good electrical conductivity of metals?

the ability of electrons to move freely about the crystal structure

atoms seldom exist as independent particles in nature because

atoms are more stable when they combine with other atoms

the arrangement of valence electrons in a metallic bond is best described as

a sea of free moving electrons

the chemical bond formed from the electrostatic attraction between oppositely charged particles

ionic bond

which of the following covalent molecules has the strongest bond

the one with the triple bond

which is the strongest intermolecular force

hydrogen bonding

a charged group of covalently bonded atoms is known as a

polyatomic

which are the intermolecular forces that can act between non polar molecules

london dispersion forces

the unequal sharing of two pairs of electrons is known as

double, polar covalent bond

bond energy is the energy

required to break a chemical bond and form separate neutral atoms

anhydrates can be defined as

compounds that have had their water molecules removed

a compound with water molecules incorperated into its crystal structure would be called

a hydrate

which of the following could be an empirical formula

N2O3

the lowest whole number ratio of the elements in a compound is called the

empirical formula

ribos has a formula mass of 150 amu and a chemical composition that is 40% carbon, 6.67 hydrogen, and 53% oxygen. what is the molecular formula of this compound?

C5H10O5

what is the percent composition of potassium in potassium nitrate?

38.67%

what is not true about empirical and molecular formulas?

the empirical formula of a compound can be triple its molecular formula

What is the empirical formula for indium sulfide if it is 70.48% Indium and 29.52% sulfur?

In2S3

what is the empirical formula for benzene, C6H6?

CH

What is the correct molar mass of Ag3PO4

418.58 g/mol

what is the percent composition of iron in iron(III)chloride, FeCl3?

34.43%

the percent composition of a compound is

the percentage by mass of each element in the compound

what is the molecular formula for the compound with an empirical formula of NO2 and a formula mass of 92.02u?

N2O4

what is the correct formula for zinc hydroxide Zn(OH)2?

99.41g

chemical properties such as reactivity and bond energy are influenced by what force?

intermolecular

london dispersion force has an impact on what properties of a compound?

boiling point