Quantity 1. Mass of crucible + cover 2. Mass of crucible + cover. Magnesium 3. Mass of Magnesium 4. Mass of crucible + cover+ magnesium oxide 5. Mass of magnesium oxide 7. Atomic mass of magnesium 6. Mass of oxygen that combined with subtract 84-82 the magnesium 8. Atomic mass of oxygen 9. Moles of magnesium 10. Subtract #2 #1 Moles of oxygen Subtract #4 #1 From the periodic table From the periodic table Divide #3/87 (In other words, divide the grams of magnesium by 24.3 to get the moles of magnesium) Your value Find the simplest whole number ratio 11. Empirical formula of magnesium between #9 and #10. Those whole oxide based on this data numbers become of the subscripts of the formula 20.00 g 24.86 g 28.06 g 24.3 16.0 moles of Mg Divide #6/88 (In other words, divide the moles of moles of O oxygen by 16.0 to get the moles of oxygen *For example, if the moles of Mg were found to be 2.0 moles, and the moles of O were found to be 6.0 moles, then you would write the following: Mg₂06 Next, divide each of the subscripts by 2 to generate whole numbers. Mg₂O This gives us Mg₁O3 which is the empirical formula based on the data in this example. Another student repeats the experiment and gets the following data. Complete the table and show the empi formula for magnesium oxide based on this student's data: Quantity 1. Mass of crucible + cover 2. Mass of crucible cover+ Magnesium 3. Mass of Magnesium 4. Mass of crucible +cover+ magnesium oxide 5. Mass of magnesium oxide 7. Atomic mass of magnesium 6. Mass of oxygen that combined with subtract #4-82 the magnesium 8. Atomic mass of oxygen 9. Moles of magnesium Subtract #2 #1 10. Moles of oxygen Subtract #4 #1 From the periodic table From the periodic table 20.00 g 11. Empirical formula of magnesium Find the simplest whole number ratio oxide based on this data between #9 and #10 Your value 24.86 g Divide #3/87 (In other words, divide the grams of magnesium by 24.3 to get the moles of magnesium) Divide #6/88 (In other words, divide the moles of oxygen by 16.0 to get the moles of oxygen 24.3 31.26 g 16.0

Chemical Principles in the Laboratory
11th Edition
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Chapter4: Determination Of A Chemical Formula
Section: Chapter Questions
Problem 2ASA: If one can find the ratio of the number of moles of the elements in a compound to one another, one...
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Quantity
1. Mass of crucible + cover
2. Mass of crucible + cover +
Magnesium
3. Mass of Magnesium
4. Mass of crucible + cover +
magnesium oxide
5. Mass of magnesium oxide
6. Mass of oxygen that combined with
the magnesium
7. Atomic mass of magnesium
8. Atomic mass of oxygen
9. Moles of magnesium
10.
Moles of oxygen
Subtract # 2 - #1
Subtract #4 - #1
Subtract #4 - #2
From the periodic table
From the periodic table
Divide #3/#7
(In other words, divide the grams of
magnesium by 24.3 to get the moles
of magnesium)
Your value
Find the simplest whole number ratio
11. Empirical formula of magnesium between #9 and # 10. Those whole
oxide based on this data
numbers become of the subscripts of
the formula*
20.00 g
24.86 g
28.06 g
24.3
16.0
moles of Mg
Divide #6/#8
(In other words, divide the moles of moles of O
oxygen by 16.0 to get the moles of
oxygen
*For example, if the moles of Mg were found to be 2.0 moles, and the moles of O were found to be 6.0 moles,
then you would write the following: Mg₂O6
Next, divide each of the subscripts by 2 to generate whole numbers.
Mg2O6 This gives us Mg₁03 which is the empirical formula based on the data in this example.
Another student repeats the experiment and gets the following data. Complete the table and show the empirical
formula for magnesium oxide based on this student's data:
Quantity
1. Mass of crucible + cover
2. Mass of crucible + cover +
Magnesium
3. Mass of Magnesium
4. Mass of crucible + cover +
magnesium oxide
5. Mass of magnesium oxide
7. Atomic mass of magnesium
6. Mass of oxygen that combined with Subtract #4 - #2
the magnesium
8.
Atomic mass of oxygen
9. Moles of magnesium
Subtract #2 - #1
10. Moles of oxygen
Subtract # 4 - #1
From the periodic table
From the periodic table
Divide #3/#7
(In other words, divide the grams of
magnesium by
24.3 to get the moles
of magnesium)
Divide #6/#8
(In other words, divide the moles of
oxygen by 16.0 to get the moles of
oxygen
11. Empirical formula of magnesium Find the simplest whole number ratio
oxide based on this data
between #9 and #10.
Your value
20.00 g
24.86 g
31.26 g
24.3
16.0
Transcribed Image Text:Quantity 1. Mass of crucible + cover 2. Mass of crucible + cover + Magnesium 3. Mass of Magnesium 4. Mass of crucible + cover + magnesium oxide 5. Mass of magnesium oxide 6. Mass of oxygen that combined with the magnesium 7. Atomic mass of magnesium 8. Atomic mass of oxygen 9. Moles of magnesium 10. Moles of oxygen Subtract # 2 - #1 Subtract #4 - #1 Subtract #4 - #2 From the periodic table From the periodic table Divide #3/#7 (In other words, divide the grams of magnesium by 24.3 to get the moles of magnesium) Your value Find the simplest whole number ratio 11. Empirical formula of magnesium between #9 and # 10. Those whole oxide based on this data numbers become of the subscripts of the formula* 20.00 g 24.86 g 28.06 g 24.3 16.0 moles of Mg Divide #6/#8 (In other words, divide the moles of moles of O oxygen by 16.0 to get the moles of oxygen *For example, if the moles of Mg were found to be 2.0 moles, and the moles of O were found to be 6.0 moles, then you would write the following: Mg₂O6 Next, divide each of the subscripts by 2 to generate whole numbers. Mg2O6 This gives us Mg₁03 which is the empirical formula based on the data in this example. Another student repeats the experiment and gets the following data. Complete the table and show the empirical formula for magnesium oxide based on this student's data: Quantity 1. Mass of crucible + cover 2. Mass of crucible + cover + Magnesium 3. Mass of Magnesium 4. Mass of crucible + cover + magnesium oxide 5. Mass of magnesium oxide 7. Atomic mass of magnesium 6. Mass of oxygen that combined with Subtract #4 - #2 the magnesium 8. Atomic mass of oxygen 9. Moles of magnesium Subtract #2 - #1 10. Moles of oxygen Subtract # 4 - #1 From the periodic table From the periodic table Divide #3/#7 (In other words, divide the grams of magnesium by 24.3 to get the moles of magnesium) Divide #6/#8 (In other words, divide the moles of oxygen by 16.0 to get the moles of oxygen 11. Empirical formula of magnesium Find the simplest whole number ratio oxide based on this data between #9 and #10. Your value 20.00 g 24.86 g 31.26 g 24.3 16.0
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