Understanding Mole Conversions: Conversion Factors & Two-Step Conversions, Study notes of Dimensional Analysis

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MOLE CONVERSIONS

USING DIMENSIONAL ANALYSIS!

CONVERSIONS

• CONVERSIONS USING DIMENSIONAL ANALYSIS:
• RELATIONSHIPS BETWEEN 2 VALUES THAT ARE EQUAL TO EACH OTHER CAN CREATE CONVERSION

FACTORS

• EX:
• 1 FOOT = 12 INCHES
• WE CAN USE THIS RELATIONSHIP TO DEVELOP TWO DIFFERENT CONVERSION FACTORS:

OR

THESE CONVERSION FACTORS ARE EQUAL

TO EACH OTHER!!!!

MOLE-ATOM CONVERSIONS

• WE CAN CREATE CONVERSION FACTORS FOR OUR MOLE VALUES!
• 1 MOLE = 6.022 X 10^23 PARTICLES

=

• *PARTICLES = ATOMS, MOLECULES, IONS, FORMULA UNITS, ETC.

MOLE-ATOM CONVERSIONS

• EX. CONVERT 4.23 MOLES OF CALCIUM TO ATOMS OF CALCIUM.
• GIVEN = 4.23 MOL CA
• FIND = ATOMS CA
• 1 MOLE CA = 6.022 X 10^23 ATOMS CA

ସ.ଶଷ ௠௢௟ ஼௔ ଺.଴ଶଶ ௫ ଵ଴మయ^ ௔௧௢௠௦ ஼௔

=

(ସ.ଶଷ ௠௢௟ ஼௔)(଺.଴ଶଶ ௫ ଵ଴మయ^ ௔௧௢௠௦ ஼௔)

= 2.55 X 10^24 ATOMS CA

MOLE-GRAM CONVERSIONS

• EX. CONVERT 124.6G OF MANGANESE TO MOLES OF MANGANESE
• GIVEN = 124.6 G MN
• FIND = MOLES MN
• 1 MOLE MANGANESE = 54.94 G MANGANESE

=

= 2.27 MOL MN

2-STEP MOLE CONVERSIONS

• YOU CAN USE BOTH CONVERSION FACTORS TO CONVERT BETWEEN GRAMS AND PARTICLES!
• 1 MOLE = 6.022 X 10^23 PARTICLES 1 MOLE = MOLAR MASS IN GRAMS

• 6.022 X 10^23 PARTICLES = 1 MOLE = MOLAR MASS IN GRAMS
• THE MOLE IS THE INTERMEDIATE STEP!

2-STEP MOLE CONVERSIONS

• EX. CONVERT 83.2 G OF CHLORINE TO ATOMS OF CHLORINE
• GIVEN = 83.2 G CL
• FIND = ATOMS CL

=

= 2.35 MOL CL

ଶ.ଷହ ௠௢௟ ஼௟ ଺.଴ଶଶ ௫ ଵ଴మయ^ ௔௧௢௠௦ ஼௟

=

(ଶ.ଷହ ௠௢௟ ஼௟)(଺.଴ଶଶ ௫ ଵ଴మయ^ ௔௧௢௠௦ ஼௟)

= 1.42 X 10^24 ATOMS CL

2-STEP MOLE CONVERSIONS

• EX. CONVERT 83.2 G OF CHLORINE TO ATOMS OF CHLORINE
• GIVEN = 83.2 G CL
• FIND = ATOMS CL ଼ଷ .ଶ ௚ ஼௟ ଵ ௠௢௟ ஼௟ ଷହ.ସହ ௚ ஼௟

଺.଴ଶଶ ௫ ଵ଴మయ^ ௔௧௢௠௦ ஼௟

=

(଼ଷ .ଶ௚ ஼௟)(ଵ ௠௢௟ ஼௟)(଺.଴ଶଶ ௫ ଵ଴మయ^ ௔௧௢௠௦ ஼௟)

= 1.41 X 10^24 ATOMS CL