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Mole Conversions Solutions Worksheet , Exercises of Chemistry

Typology: Exercises

2020/2021

Uploaded on 04/20/2021

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1.2 Mole Conversions Solutions
PRACTICE EXAMPLES- To complete the practice examples (1) write the type of question you have, (2) write
the equation with units, (3) show the cancellation of units and (4) calculate the solution.
1. Determine how many atoms are present in 2.5 moles of Silicon? (15.05 × 1023 atoms)
MOLES ATOMS
mole
atomsmoles
_1
10022.6
1
_5.2 23
= 15.05 x 1023 atoms
2. How many moles of Silicon is 3.01 × 1023 atoms? (.5 moles)
ATOMS MOLES
atom
moleatoms
23
23
10022.6
_1
1
10011.3
= .5 moles
3. What is the mass of 4 moles of Iron? (224 grams)
MOLES GRAMS
mole
gramsmoles _9.55
1
_4
224 grams of C
4. How many atoms are in 48.6 grams of Magnesium? (12.04 × 1023 atoms)
GRAMS ATOMS
mole
atoms
grams
molegrams
_1
10022.6
_3.24
_1
1
_6.48 23
12.04 x 1023 atoms
5. How many grams are in 18 .06 x 1023atoms of Copper? (190.5 grams)
ATOMS GRAMS
mole
grams
atoms
moleatoms
_1
_5.63
10022.6
_1
1
1006.18
23
23
190.5 grams
6. How many moles of Nickel is 176 grams? (3 moles)
GRAMS MOLES
grams
moleCofgrams
_7.581
___176
3 moles
pf3
pf4

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1.2 Mole Conversions Solutions

PRACTICE EXAMPLES- To complete the practice examples (1) write the type of question you have, (2) write the equation with units, (3) show the cancellation of units and (4) calculate the solution.

  1. Determine how many atoms are present in 2.5 moles of Silicon? (15.05 × 10^23 atoms)

MOLESATOMS mole

moles atoms 1 _

2. 5 _  ^23

= 15.05 x 10^23 atoms

  1. How many moles of Silicon is 3.01 × 10^23 atoms? (.5 moles)

ATOMSMOLES atom

atoms mole 23

23

  1. 022 10

1 _

= .5 moles

  1. What is the mass of 4 moles of Iron? (224 grams)

MOLES  GRAMS ^ 

mole

moles 55. 9 _ grams 1

4 _

224 grams of C

  1. How many atoms are in 48.6 grams of Magnesium? (12.04 × 10^23 atoms)

GRAMS  ATOMS    

mole

atoms grams

grams mole 1 _

24. 3 _

1 _

48. 6 _^23

12.04 x 10^23 atoms

  1. How many grams are in 18 .06 x 10^23 atoms of Copper? (190.5 grams)

ATOMS  GRAMS  

mole

grams atoms

atoms mole 1 _

63. 5 _

1 _

23

23 190.5 grams

  1. How many moles of Nickel is 176 grams? (3 moles)

GRAMSMOLES ^ grams

grams of C mole 1 58. 7 _

176 _ _ _

3 moles

1.3 Mole Conversions Solutions