Moles, Molar Mass, and Conversions

Moles, Molar Mass, and Conversions

Assessment

Flashcard

Chemistry

9th - 12th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

2.

FLASHCARD QUESTION

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

3.

FLASHCARD QUESTION

Front

How many atoms are in 1 mole of any substance?

Back

1 mole of any substance contains approximately 6.022 x 10^23 atoms, known as Avogadro's number.

4.

FLASHCARD QUESTION

Front

What is the empirical formula?

Back

The empirical formula is the simplest whole-number ratio of atoms of each element in a compound.

5.

FLASHCARD QUESTION

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, add the atomic masses of all the atoms in the compound's formula.

6.

FLASHCARD QUESTION

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18 g/mol (2*1 g/mol for H + 16 g/mol for O).

7.

FLASHCARD QUESTION

Front

What is the relationship between moles and grams?

Back

The relationship is given by the formula: grams = moles x molar mass.

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