How do you convert grams into moles.?

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How do you convert grams into moles.?

An examle of this would be how would you convert 12.4 g of sucrose (C12H22O11) into moles of sucrose?

2007-09-21 08:44:48 · 2 answers · asked by Robbie B 2 in Science & Mathematics ➔ Chemistry

2 answers

Calculate the molecular weight of the compound. Then divide grams by the molecular weight. In this case, the m.w. of sucrose = 342, so 12.4 g = 0.0363 mole.

2007-09-21 08:51:41 · answer #1 · answered by PaulCyp 7 · 0⤊ 0⤋

grams divided by grams/mol = moles

find grams per mole using periodic table.

For carbon = 12*12.01 = 144.12 g/mol
For Hydrogen = 22*1.01 = 22.22 g/mol
For Oxygen = 11*16.00 = 176.0 g/mol
Total g/mol for C12H22O11 is = 342.34

# of grams / 342.34g/mol = # of moles

2007-09-21 08:54:28 · answer #2 · answered by texasnewf 1 · 0⤊ 0⤋