Homework Help: 9th grade

Posted by Anonymous on Wednesday, May 26, 2010 at 10:22am.

if you weighed 14.00 grams of MgCO3 how many moles of MgCO3 did you weigh

math needs help - SraJMcGin, Wednesday, May 26, 2010 at 10:28am
NOT 9th grade as the School Subject.

Sra
Chemistry - Damon, Wednesday, May 26, 2010 at 10:53am
14.00 grams of MgCO3 how many moles of MgCO3
Mg = 24.3 g/mol
C = 12 g/mol
30 = 3*16 = 48 g/mol
so
MgCO3 = 84.3 g/mol
14/84.3 = .166 mol

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