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Moles of Compounds

Moles of Compounds

Assessment

Flashcard

Science

9th - 12th Grade

Easy

Created by

Barbara White

Used 1+ times

FREE Resource

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10 questions

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1.

FLASHCARD QUESTION

Front

Mole Noun

[mohl]

Back

Mole


The SI base unit for the amount of a substance, representing 6.022 × 10²³ representative particles of that substance.

Example: This image shows that one mole is a specific quantity (6.022 x 10^23 particles) and has a mass that can be measured, like 12 grams for carbon.
Media Image

2.

FLASHCARD QUESTION

Front

Representative Particle Noun

[rep-ri-zen-tuh-tiv par-ti-kuhl]

Back

Representative Particle


The smallest unit in which a substance naturally exists, which can be an atom, a molecule, or a formula unit.

Example: For an ionic compound like salt, the representative particle is a 'formula unit,' which is the smallest whole-number ratio of ions in the crystal.
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3.

FLASHCARD QUESTION

Front

Molar Mass Noun

[moh-ler mas]

Back

Molar Mass


The mass in grams of one mole of a pure substance, which is expressed in units of grams per mole (g/mol).

Example: The molar mass of a compound is calculated by adding the atomic masses of each atom in the molecule, as shown for water (H₂O).
Media Image

4.

FLASHCARD QUESTION

Front

Chemical Formula Noun

[kem-i-kuhl for-myoo-luh]

Back

Chemical Formula


A representation of a compound indicating the types and numbers of atoms present in one unit of the substance.

Example: This image shows a model of a methane molecule and its chemical formula, CH₄, which indicates it contains one carbon (C) and four hydrogen (H) atoms.
Media Image

5.

FLASHCARD QUESTION

Front

Subscript Noun

[suhb-skript]

Back

Subscript


A number in a chemical formula written slightly below and to the right of a symbol to show atom quantity.

Example: The subscript '2' in the chemical formula CO₂ indicates that there are two oxygen atoms for every one carbon atom in a molecule of carbon dioxide.
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6.

FLASHCARD QUESTION

Front

Mole Ratio Noun

[mohl rey-shee-oh]

Back

Mole Ratio


A conversion factor from a formula's subscripts that relates the moles of elements within one mole of the compound.

Example: This image shows that for every two molecules of hydrogen (H₂) and one molecule of oxygen (O₂), two molecules of water (H₂O) are formed.
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7.

FLASHCARD QUESTION

Front

Avogadro's Number Noun

[ah-vuh-gah-drohz nuhm-ber]

Back

Avogadro's Number


The number of representative particles in one mole of a substance, which is approximately 6.022 × 10²³ particles per mole.

Example: This image shows that Avogadro's number (6.022 x 10^23) is the quantity of atoms found in exactly 12 grams of carbon.
Media Image

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