BIOL 2112 Lecture Notes - Lecture 2: Volumetric Flask, Garden Ornament, Molar Concentration
19 Nov 2018
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Ca = 40, 2 x cl = 2 x 35 = 70 total formula weight = 110 grams. 110 grams / liter = 1 molar solution (3 liters) (110 grams / mole) (1. 5 moles / liter) = 495 grams cacl2. In a volumetric flask, add 495 grams cacl2 to ~ 2 liters of h2o while stirring. 1 liter of . 2m nacl combined with . 2 liters of . 5 m nacl. Remember: molarity is moles/liter (. 1 liter) (. 2 moles / liter) + (. 2 liters) (. 5 moles / liter) = A mating pair is sitting ~2 feet apart. The female is in a puddle containing ~100 milliliters of water. The male is sitting on a fancy copper garden ornament that weighs ~400 grams. It is a very warm day; the temperature of both the ornament and water are 33oc. The sun"s rays provide an additional 10,000 joules of energy to both the water and the ornamental perch.
