chem UNIT 5.4 Review:  Mole Concept

chem UNIT 5.4 Review: Mole Concept

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Chemistry

7th 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, ions, 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 the molar mass of Ti(NO3)4?

Back

The molar mass of Ti(NO3)4 is approximately 292.11 g/mol.

4.

FLASHCARD QUESTION

Front

How many moles are in 675 grams of Ti(NO3)4?

Back

2.28 mol Ti(NO3)4.

5.

FLASHCARD QUESTION

Front

What is the molar mass of BaCO3?

Back

The molar mass of BaCO3 is approximately 197.34 g/mol.

6.

FLASHCARD QUESTION

Front

How many moles are in 540 grams of BaCO3?

Back

2.737 mol BaCO3.

7.

FLASHCARD QUESTION

Front

What is the molar mass of CO2?

Back

The molar mass of CO2 is approximately 44.01 g/mol.

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