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Problem of the week - 20/05/2013

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Borek:
When a sample of a rose red, rare mineral is reacted with 115.8 mL of 0.1 molar HCl, number of mLs of produced carbon dioxide (measured at 0°C and 1 atm) is identical to the molar mass of produced chloride. Identify the metal, name the mineral.

Schrödinger:
Pbonyg ; Fcunrebpbonygvgr

delta609:
I think it's Rhodocrosite (MnCO3), but the calculations don't add up. 

MnCO3 + 2HCl  :rarrow: MnCl2 + CO2 + H2O

115.8 L of 0.1 molar HCl will produce .1289 mL CO2; whereas, the molar mass of MnCl2 is 125.9 g/mol. 

Borek:
Calculations don't add up, because it is not the correct answer. But you are not that far.

DrCMS:
Sphaerocobaltite?

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