1/9/18 Opener How many moles are there if you have 3.08 x 1024 particles of Ag? Please get out your weekend homework assignment, periodic table, & a calculator.

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Presentation transcript:

1/9/18 Opener How many moles are there if you have 3.08 x 1024 particles of Ag? Please get out your weekend homework assignment, periodic table, & a calculator.

Atoms, Mass, & the Mole SWBAT convert between grams, moles, & Atoms to complete 2 step problems

Atoms to Grams Step 1: Convert Atoms to Moles 1 mole = 6.02 x 1023 Divide by Avogadro’s number Step 2: Convert Moles to Grams Find the molar mass: X g = 1 mole Multiply by the molar mass Given number of particles 6.02 x 1023 1 mole X grams 1 mol

Practice Problem What is the mass of 4.08 x 1022 particles of NaCl? How many particles are in a mole? What is the molar mass of NaCl?

Grams to Atoms Step 1: Convert Grams to Moles Find the molar mass: X g = 1 mole Divide by the molar mass Step 2: Convert Moles to Atoms 1 mole = 6.02 x 1023 Multiply by Avogadro’s number Given grams 1 mol 6.02 x 1023 1 mole X grams

Practice Problem How many particles make up 452 grams of HF? What is the molar mass of HF? How many particles are in a mole?

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