Moles/Molar Mass

Moles/Molar Mass

Assessment

Flashcard

Chemistry

10th Grade

Hard

Created by

Wayground Content

FREE Resource

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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

How do you calculate the number of moles from grams?

Back

Number of moles = mass (grams) / molar mass (g/mol).

3.

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.

4.

FLASHCARD QUESTION

Front

What is the molar mass of potassium sulfide (K2S)?

Back

The molar mass of K2S is approximately 110.26 g/mol.

5.

FLASHCARD QUESTION

Front

How many atoms are in one mole of a substance?

Back

One mole of a substance contains approximately 6.022 x 10^23 entities, known as Avogadro's number.

6.

FLASHCARD QUESTION

Front

What is the molar mass of sodium hydroxide (NaOH)?

Back

The molar mass of NaOH is 40 g/mol.

7.

FLASHCARD QUESTION

Front

How do you convert atoms to moles?

Back

To convert atoms to moles, divide the number of atoms by Avogadro's number (6.022 x 10^23).

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