Homework Help: chemistry

Posted by saddee on Tuesday, April 28, 2009 at 4:42pm.

A 0.5215 gram sample of CaCO3 is dissolved in 12M HCl and the resulting solution is diluted to 250.0 mL in a volumetric flask.

How many moles of CaCO3 are used?

chemistry - DrBob222, Tuesday, April 28, 2009 at 5:18pm
grams/molar mass = moles. How many moles "were used" I don't know? How many mL did you use of the 250.
Moles used = moles in flask x (mL used/250) = ??
chemistry - Anonymous, Wednesday, March 14, 2012 at 12:03am
What mass of natural gas {\rm{(CH}}_4 ) must you burn to emit 271 kJ of heat?

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