- #1
gokugreene
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Hey could you guys tell me whether I am on the right track with this or not.
First Problem:
A tablespoon of sugar, [tex]C_1_2H_2_2O_1_1[/tex], weighs 2.85g.
molar mass of sugar = 352g
molar mass of oxygen = 16g
A.) How many moles of sugar are there in a tablespoon?
(2.85g of sugar/1)(1 mole/352g of sugar)
B.) How many grams of O are there in a tablespoon?
(2.85g of sugar/1)(1 mole/352g of sugar)(16g of Oxygen/1 mole)(11 atoms of oxygen)
Am I doing those right? My teacher never went over it in class and I can't find any examples on the net.
Second Problem:
Sample A is [tex]1.555~x~10^{-5}[/tex] mole of [tex]AlK (SO_4)_2~12H_2O[/tex]
molar mass of [tex]AlK (SO_4)_2~12H_2O[/tex] = 462g
molar mass of oxygen = 16.00g
A.) How many grams of O are present?
([tex]1.555~x~10^{-5}[/tex]/1)(462g/1 mole)(16g of oxygen/1 mole)(22 atoms of oxygen)
Is this how you do it?
Thanks
First Problem:
A tablespoon of sugar, [tex]C_1_2H_2_2O_1_1[/tex], weighs 2.85g.
molar mass of sugar = 352g
molar mass of oxygen = 16g
A.) How many moles of sugar are there in a tablespoon?
(2.85g of sugar/1)(1 mole/352g of sugar)
B.) How many grams of O are there in a tablespoon?
(2.85g of sugar/1)(1 mole/352g of sugar)(16g of Oxygen/1 mole)(11 atoms of oxygen)
Am I doing those right? My teacher never went over it in class and I can't find any examples on the net.
Second Problem:
Sample A is [tex]1.555~x~10^{-5}[/tex] mole of [tex]AlK (SO_4)_2~12H_2O[/tex]
molar mass of [tex]AlK (SO_4)_2~12H_2O[/tex] = 462g
molar mass of oxygen = 16.00g
A.) How many grams of O are present?
([tex]1.555~x~10^{-5}[/tex]/1)(462g/1 mole)(16g of oxygen/1 mole)(22 atoms of oxygen)
Is this how you do it?
Thanks