MOLE CONVERSIONS.

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Presentation transcript:

MOLE CONVERSIONS

Remember….. 1 mole = 6.02 x 1023 atoms of element/molecules of chemical compound Atomic mass of element Formula mass of a compound

Example 1: Calcium has a mass of 10.0g. How many moles of Calcium? Atoms? 0.25 mole Ca 1.5 x 1023 atoms Ca

Example 2: 86.2 grams C2H4. How many moles of C2H4? How many molecules? 3.08 moles C2H4 1.85 x 1024 molecules C2H4

Formula Mass Sum of atoms/ions’ masses in a chemical formula. Molecular mass— Refers to the sum of atom masses in a molecular formula.

Example 1: NaCl

Example 2: Which of the following contains the same number of atoms as 4.032g of hydrogen atoms? 1 mole of H2 6.022 x1023 moles of H 6.022 x 1023 moles of H2 (2)(6.022x1023) moles of H2 D

Practice C22H24N2O8 (tetracycline) 2) C5H8NNaO4 (MSG)