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General Chemistry > Chapter 4 > Flashcards

Chapter 4 Flashcards

1
Q

molecule

A

2 or more atoms held together by covalent bonds

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2
Q

atomic weight

A

the weighted average of the masses of the naturally occurring isotopes of an element (not their weight)

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3
Q

molecular weight

A

the sum of the atomic weights of all the atoms in a molecule

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4
Q

molar mass

A

the mass of one mole of a compound
g/mol

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5
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

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6
Q

empirical formula

A

gives the simplest whole-number ratio of the elements in the compound

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7
Q

molecular formula

A

gives the exact number of atoms of each element in the compound

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8
Q

percent composition

definition

A

the percent of a specific compound that is made up of a given element

ex. percent of carbon in glucose molecule

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9
Q

percent composition

definition

A

the percent of a specific compound that is made up of a given element

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10
Q

percent composition (by mass)

equation

A

percent composition = [ (mass of element in formula) / (molar mass) ] x 100%

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11
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

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12
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

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13
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

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14
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

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15
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

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16
Q

combustion reactions

A

a fuel (usually a hydrocarbon) and an oxidant (typically oxygen) react, forming the 2 products H2O and CO2

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17
Q

displacement reactions

A

atoms or ions of one compound are replaced with atoms or ions of another compound

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18
Q

single-displacement reactions

A

an atom or ion of one compound is replaced by an atom or ion of another element

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19
Q

double-displacement reactions

A

elements from two different compounds trade places with each other to form two new compounds

20
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

21
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

22
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

22
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

22
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

23
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

24
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

24
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

24
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

25
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

26
Q

mole

A

a quantity of any substance (atoms, molecules, kittens, etc…) equal to the number of particles that are found in 12 grams of carbon-12

27
Q

avogadros number

A

the number of particles found in 1 mole

6 x 10^23

27
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

27
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

27
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

28
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

29
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

30
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

31
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

32
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

32
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

33
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

33
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

33
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

34
Q

how to determine moles in a given sample substance

A

moles = mass of sample (g) / molar mass (g/mol)

34
Q

combination (synthesis) reactions

A

two or more reactants combine to form one product

34
Q

decomposition reactions

A

a single reactant is chemically broken down into two or more products

General Chemistry (19 decks)

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