12 notes ChemCalculations2_ppt [Compatibility Mode]

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1 1 1 Lecture 12 Chemical Calculations, Chapter 9: The Mole and Chemical Formula 2 What is the Mass of one Mole ? square4 Molar Mass of an Element The mass in grams that is numerically equivalent to the atomic mass of that element. units of molar mass are: grams/mole atomic mass of 12 C: 12 amu 1 mole of 12 C atoms weighs 12 g/mole 3 Molar Mass of a Compound The mass in grams that is numerically equivalent to the formula mass of that compound. NO 2 formula mass: 46.01 amu molar mass: 46.01 g/mole The molar mass of any substance is the mass in grams of one mole of that substance. units of g/mole 4 What is the mass in grams of 0.250 moles of Na 2 CO 3 , an industrial chemical used in the making of glass?
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2 2 5 Substance Dissolved in a Liquid - concentration square4 Molarity (Chapter 13.8 pg 581) The number of moles of substance ( solute ) dissolved in one litre of solution - gives us the concentration Molarity (M) = moles of solute litres of solution 1 Molar solution of CuSO 4 contains 1 mole of CuSO 4 in
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