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thread starter Leafyy Sep 07 2010
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| I've been stuck on this chemistry question for ages. "What mass of sodium carbonate decahydrate contains 5.47 x 10 ^ 23 atoms of oxygen?" The back of the textbook keeps telling me that my answer is wrong. Can anyone help me figure it out? Sigh, chemistry homework on the first day of school. :l |
My Characters: LeafyLemons - 38 Windia F/P Wizard
arrowarrow 09/07/10
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| [quote] RoadRoster : Na2CO3*10H2O Each mole has 3 + 10 = 13 x 6.02 x 10^23 atoms of O = 7.83 x 10^24 Moles Na2CO3*10H2O = 5.47 x 10^23 / 7.83 x 10^24 =0.0699 Molar mass = 286 g/mol Mass = 0.0699 mol x 286 g/mol =20.0 g [/quote] ninja'd. yeah that's right |
CygnusSalad 09/07/10
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| Leafyy pokemon.com > all. jk. anywayz, i hope you get an answer. |
My Characters: LidoSin01 - 122 Bera Night Lord
Leafyy 09/07/10
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| [quote] RoadRoster : Na2CO3*10H2O Each mole has 3 + 10 = 13 x 6.02 x 10^23 atoms of O = 7.83 x 10^24 Moles Na2CO3*10H2O = 5.47 x 10^23 / 7.83 x 10^24 =0.0699 Molar mass = 286 g/mol Mass = 0.0699 mol x 286 g/mol =20.0 g [/quote] Thanks for taking the time to help me. Greatly appreciated. |
My Characters: LeafyLemons - 38 Windia F/P Wizard
doomzdragonz 09/07/10
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My Characters: AcemagicianX - 68 Bera I/L Wizard
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