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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Jess8219 Jess8219
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4 years ago
Indigo, C16H10N2O2 is the common name of the dye that gives blue jeans their colour. Calculate the mass of oxygen in 25.0g of Indigo.
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#1
Educator
4 years ago
Hi Jess8219

Sorry for the late response.

Molar mass is 262.27 g/mol

Oxygen alone is 2 times its molar mass of 16.00 = 32.00

32.00 / 262.27 = 0.1220 or 12.2% is oxygen

Take this decimal number and multiply by 25.0

25.0 * 0.1220 = 3.05 is oxygen ONLY

Hope that helps
Jess8219 Author
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#2
4 years ago
that helps thanks
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#3
Educator
4 years ago
Please mark your topic as solved Slight Smile
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