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Gen Chem > Composition of Substances/Solutions > Flashcards

Composition of Substances/Solutions Flashcards

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1
Q

Formula Mass

A

Sum of the average masses for all atoms represented in a chemical formula; for covalent compounds, this is also the molecular mass

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2
Q

Mole

A

Amount of substance containing the same number of atoms, molecules, ions, or other entities as the number of atoms in exactly 12 grams of ^12C

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3
Q

Avogadro’s Number (NA)

A

Experimentally determined value of the number of entities comprising 1 mole of substance, equal to 6.022 x 12^23mol^-1

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4
Q

Molar Mass

A

Mass in grams of 1 mole of a substance

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5
Q

Percent Composition

A

Percentage by mass of the various elements in a compound

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6
Q

Empirical Formula Mass

A

Sum of average atomic masses for all atoms represented in an empirical formula

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7
Q

Concentration

A

Quantitative measure of the relative amounts of solute and solvent present in a solution

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8
Q

Solvent

A

Solution component present in a concentration that is higher relative to other components

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9
Q

Dissolved

A

Describes the process by which solute components are dispersed in a solvent

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10
Q

Aqueous Solution

A

Solution for which water is the solvent

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11
Q

Solute

A

Solution component present in a concentration less than that of the solvent

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12
Q

Dilute

A

Qualitative term for a solution containing solute at a relatively low concentration

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13
Q

Concentrated

A

Qualitative term for a solution containing solute at a relatively high concentration

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14
Q

Molarity (M)

A

Unit of concentration, defined as the number of moles of solute dissolved in 1 liter of solution

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15
Q

Dilution

A

Process of adding solvent to a solution in order to lower the concentration of solutes

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16
Q

Mass Percentage

A

Ratio of solute-to-solution mass expressed as a percentage

17
Q

Volume Percentage

A

Ratio of solute-to-solution volume expressed as a percentage

18
Q

Mass-Volume Percent

A

Ratio of solute mass to solution volume, expressed as a percentage

19
Q

Parts per Million (ppm)

A

Ratio of solute-to-solution mass multiplied by 10^6

20
Q

Parts per Billion (ppb)

A

Ratio of solute-to-solution mass multiplied by 10^9

Gen Chem (9 decks)

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