Presentation on theme: "What is a Mole How many socks come in a pair? 2 How many eggs are in a dozen? 12 How many eggs come in a gross? 144 How many pencils come in a ream? 500."— Presentation transcript:
Molar Mass of a Compound Determine the molar mass of each of the following compounds: NaOH CaCl 2 KC 2 H 3 O 2 C 2 H 5 OH HCN CCl 4 (NH 4 ) 3 PO 4
Converting moles to mass The characteristic odor of garlic is due to the compound (C 3 H 5 ) 2 S. What is the mass of 2.5 moles of (C 3 H 5 ) 2 S? What is the mass of 3.25 mol of H 2 SO 4 ?
Converting Mass to Moles Calculate the number of moles in 325 g of Calcium hydroxide Ca(OH) 2 ? Calculate the number of moles in 22.6 g of AgNO 3.
Mass to Number of Particles How many Aluminum Chloride molecules are present in 35.6 g of AlCl 3 How many Al atoms are there? How many Cl atoms are there?
Example Aluminum oxide (Al 2 O 3 ) when dissolved in water breaks apart into ions (Al 3+ and O 2- ) how many moles of Al 3+ will be produced when 1.5 moles of Al 2 O 3 are dissolved in water?
Examples 1. What is the molar mass of ethanol C 2 H 5 OH? How many ethanol molecules are present in 45.6 g? How many carbon atoms are there in 45.6 g of ethanol? How many hydrogen atoms are there in 45.6 g of ethanol? How many oxygen atoms are there in 45.6 g of ethanol? 2. A sample of sodium sulfite Na 2 SO 3 has a mass of 2.25 g How many molecules of sodium sulfite are there? How many atoms of sodium are there? How many atoms of Sulfur are there? How many atoms of oxygen are there?