Mole Conversions and Calculations

Mole Conversions and Calculations

Assessment

Interactive Video

Chemistry, Mathematics, Science

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial explains how to convert atoms to moles using Avogadro's number (6.02 x 10^23 atoms per mole). It uses relatable examples like dozens of cookies to simplify the concept. The tutorial includes three examples: converting sulfur, sodium, and oxygen atoms to moles. It emphasizes the importance of using the exponent button on calculators for accurate calculations. The video concludes by highlighting that no mass calculations were involved and introduces the next tutorial, which will combine gram-mole and mole-atom problems.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the value of Avogadro's number used for converting atoms to moles?

3.02 times 10 to the 23rd

9.02 times 10 to the 23rd

12.02 times 10 to the 23rd

6.02 times 10 to the 23rd

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many items are there in a dozen?

24

12

10

6

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If you have 3.0 times 10 to the 21 atoms of sulfur, how many moles do you have?

1.5 moles

2.99 times 10 to the negative seventh moles

3.65 moles

4.98 times 10 to the negative third moles

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in converting atoms to moles?

Subtract Avogadro's number

Multiply by Avogadro's number

Divide by Avogadro's number

Add Avogadro's number

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many moles are there in 2.2 times 10 to the 24 atoms of sodium?

0.0365 moles

36.5 moles

3.65 moles

0.36 moles

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why do atoms cancel out in the conversion process?

Because they are not needed

To simplify the equation

Because they are too small

Due to unit conversion

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of dividing 1.8 times 10 to the 17 atoms of oxygen by Avogadro's number?

2.99 times 10 to the negative seventh moles

4.98 times 10 to the negative third moles

1.8 moles

3.65 moles

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