Basic Mole Conversions (Reg) Review

Basic Mole Conversions (Reg) Review

Assessment

Flashcard

Chemistry

11th 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 6.02 x 10^23, which represents the number of representative particles (atoms, molecules, etc.) in one mole of a substance.

2.

FLASHCARD QUESTION

Front

How many molecules are in one mole of a substance?

Back

There are 6.02 x 10^23 molecules in one mole of a substance.

3.

FLASHCARD QUESTION

Front

What is the formula to calculate the number of moles from mass?

Back

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

4.

FLASHCARD QUESTION

Front

What is the molar mass of Potassium Chloride (KCl)?

Back

The molar mass of KCl is approximately 74.55 g/mol.

5.

FLASHCARD QUESTION

Front

How do you calculate percent by mass?

Back

Percent by mass = (mass of component / total mass) x 100%.

6.

FLASHCARD QUESTION

Front

What is the percent by mass of Copper (Cu) in CuBr2?

Back

The percent by mass of Cu in CuBr2 is 28.4%.

7.

FLASHCARD QUESTION

Front

What is the relationship between moles and grams?

Back

Moles can be converted to grams using the formula: grams = moles x molar mass.

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