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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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OldSpice OldSpice
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9 years ago
A 25.0 mL solution of sodium dichromate, Na2Cr2O7 (261.98 g/mol), with a mass of 25.950 g, is evaporated to dryness. If the orange residue has a mass of 1.295 g, what is the mass/mass percent concentration and molarity of the solution?
A) 4.99% and 0.190 M
B) 4.99% and 0.198 M
C) 4.99% and 0.396 M
D) 5.18% and 0.190 M
E) 5.18% and 0.198 M
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ElectricElectric
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9 years ago
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.silent.boss

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OldSpice Author
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#2
9 years ago
Perfect!

..Thank you so much for your support
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#3
9 years ago
My pleasure
.silent.boss
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#4
4 years ago
thanks
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#5
4 years ago
thanks
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#6
3 years ago
Arigato Moisamas
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#7
3 years ago
thanks
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#8
3 years ago
Thank you
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