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Molar Mass Molar mass means to calculate the mass of an element or compound. The units are g/mol. Examples: Calculate the molar mass of the following elements: Na = O =
Calculate molar mass for the following compounds: Na. Cl = Ca(OH)2 = Copper(II) nitride = Aluminum sulfate =
Converting to Moles What is a mole? A unit of measurement. How do I calculate the amount of moles? Use the molar mass.
How do I convert to moles? Use the molar mass; this is the purpose of calculating it in the first place!
Create a Flow Chart Grams moles
Converting to Moles 1. Determine the number of moles of Na. Cl in 50 g of Na. Cl.
Converting to Moles 2. You are given 362. 8 g of the compound C 5 H 12. Determine the number of moles.
Converting to Moles 3. How many moles are in 25 g of water?
Try on Your Own 4. 5. 6. Determine the moles in 5 g of sodium oxide. Determine the moles in 10 g of iron (III) chloride. Determine the moles of C 3 H 8 in 2. 3 g of C 3 H 8.
Converting to Grams This is just the reverse process Grams moles 7. Determine the mass of 1. 112 mol of sodium fluoride.
Moles to Grams 8. Find the mass of 0. 89 mol of Ca. Cl 2.
Moles to Grams 9. How many grams are in 4. 50 moles of lithium oxide?
Practice: Show all your work! 1. 64 g Na. Cl = _____mol 2. 10. 2 mol Sr = ______g 3. 0. 49 g iron (III) chloride = ____mol 4. Calculate the moles in your copper sample. Show all work. Number of sample_____ Moles =____
Practice! 4. 22 mol Sr. O = _____g 5. 12 g sodium phosphate =______mol 6. 0. 89 g iron (II) iodide =_____mol
Recognize the pattern! There is only one of two ways to solve these problems.
Practice! 34. . 05 mole lead (IV) sulfate = __g 35. 16 g silver cyanide = __mol 36. 25. 3 mol vanadium (V) nitride =_g 37. 100 g strontium acetate = _mol
On Your Own 38. 5 g molybdenum sulfate = _mol 39. 325 mol platinum (II) sulfide = _g 40. 26 g ammonium sulfate = _mol
Exit Questions 1. 2. 3. Calculate the grams in 33 moles of Ba. Cl 2. Name this compound. Is this an ionic compound or a covalent compound? Explain how to tell the two types of bonding apart?
Measurement Activity Measurement of Grams and Moles Using the copper sample provided (copper #_____), determine the number of moles in the sample. Weigh out. 05 moles of sugar (C 6 H 12 O 6). Weigh out. 03 moles of aluminum.
Avogadro’s Number Avogadro’s number relates moles to atoms 6. 02 x 1023 atoms in 1 mole OR 6. 02 x 1023 atoms = 1 mole
Here is what that looks like! 6020000000. atoms in 1 mole
Using Avogadro’s Number 1. How many moles are in 23 3. 45 x 10 atoms of H 2 SO 4?
Example 2 2. Calculate the amount of moles contained in a salt dispenser that has 23. 5 x 1023 atoms?
Example 3 3. How many atoms are in 67 moles of Ca. Cl 2?
On Your Own! 1. 2. How many atoms are in 32 moles of ammonia (NH 3)? How many atoms are in 23 moles of propane (C 3 H 8)?
Going from Grams->moles->atoms 1. How many atoms are in 22 g of salt?
Going from Grams->moles->atoms 2. Calculate the number of molecules in 72. 3 g of potassium sulfide.
Equations and Stoichiometry 1. A solution of sodium hydroxide is reacted with hydrochloric acid. Given that the reaction is started with 2 g of sodium hydroxide, what mass of water can be expected?
Equations and Stoichiometry 2. Nitrogen gas and hydrogen gas combine to make ammonia. Given 5 grams of hydrogen, what mass of ammonia is produced?
Equations and Stoichiometry 3. Magnesium and hydrofluoric acid react in a beaker. If the reaction is started with 55 g of hydrofluoric acid, what mass of magnesium fluoride can be produced?
Exit Question Glucose is burned in the presence of air. If the reaction is started with 0. 0103 moles of oxygen, how much glucose is required for the reaction?
Metric and Moles 4. 6. 8 g Mg. CO 3 = _______mol 5. 84. 6 dg Hg. O = _______mol 6. 74 mol KOH = _____Dg 7. 0. 52 mg Mg. S = ____mol