Unit 3 Review

Unit 3 Review

Assessment

Flashcard

Chemistry

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

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15 questions

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1.

FLASHCARD QUESTION

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of representative particles (atoms, molecules, etc.) in one mole of a substance.

2.

FLASHCARD QUESTION

Front

What is the mass of 0.02 moles of potassium atoms?

Back

0.02 moles of potassium atoms has a mass of 0.782 g.

3.

FLASHCARD QUESTION

Front

How many molecules are in 1 mole of a substance?

Back

1 mole of a substance contains 6.022 x 10^23 molecules.

4.

FLASHCARD QUESTION

Front

What is the relationship between moles and mass?

Back

The mass of a substance in grams can be calculated by multiplying the number of moles by the molar mass of the substance.

5.

FLASHCARD QUESTION

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

6.

FLASHCARD QUESTION

Front

How do you calculate the number of molecules from moles?

Back

To calculate the number of molecules from moles, multiply the number of moles by Avogadro's number (6.022 x 10^23).

7.

FLASHCARD QUESTION

Front

What is the molar mass of AlCl3?

Back

The molar mass of AlCl3 (Aluminum Chloride) is approximately 133.33 g/mol.

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