1. Mole / Gram Conversion Steps (Dimensional Analysis) 1.Determine the starting point and final destination in the problem. 2.Using the information gathered from the question, write your starting point and your final destination. 3.Determine & write out the chemical formula for the compound given in the problem. 4.Find the relationship between moles and grams by calculating the molar mass of the compound… remember that g mol -1 = grams per mole which means that there are x moles in 1 mole of the substance. 5.Create a fraction by placing your starting point over one. 6.Multiply between fractions. 7.Write in the bottom unit of the new fraction. This should be the same as the top unit of the previous fraction. 8.Write the final destination 9.Write one set of “connections” or conversion factors into the fraction. Your bottom unit will guide you. 10.Cancel any units that are diagonal. (This should leave you with only the units that represent your final destination) 11.Multiply the top of the fractions…multiply the bottom of the fractions…divide the top by the bottom. 12.Write your answer and make sure to include units!!!

2. Practice Conversions 1.How many moles are in 6 grams of water? 2.How many grams are in 5.0 moles of water? 3.If you put 2.78 grams of salt on your chicken, how many moles is that? 4.The average American consumes 80.89 moles of sugar a year. Assuming it is all sucrose (C 12 H 22 O 11 ), how many grams is that? http://discovermagazine.com/2009/oct/30-20-things-you-didnt-know-about-sugar 5.If Mr. Pruett’s Chia Tea Latte has 120.0 mg of caffeine (C 8 H 10 N 4 O 2 ), how many moles has she consumed?

3. How many moles are in 6 grams of water? 6 grams of water  moles H 2 O (6 grams) 1 ( ) mole grams 0.33296 moles H 2 O 1 18.02 = (6 moles) (18.02) = Step 1 – Read the question and determine what information it provides you with (starting point & final destination) Step 2 – Write down your starting point and your final destination 18.02 g = 1 mole H 2 O Step 3 – Determine how you will get from your starting point to your final destination (list any “connections” or conversion factors) Step 4 – Create a fraction by placing your starting point over one Step 5 – Multiply between fractions Step 6 – Write in the bottom unit of the new fraction (this is the same as the top unit of your previous fraction) Step 7 – Write the appropriate conversion factor into the fraction. Your bottom unit will guide you. Step 8 – Determine if this top unit is the desired unit (your final destination). In this case the answer is YES, so we move on to step 9 Step 9 – Cancel all diagonal units. Once this is done, your final destination should be the only unit left – in this case seconds Step 10 – Multiply the top of the fractions; multiply the bottom of the fractions; divide the product of the top by the product of the bottom Starting Point Final Destination

4. How many grams are in 5.0 moles of water? 5.0 moles  grams H 2 O 5.0 moles 1 ( ) grams mole 90.1 grams of water 18.02 1 = (5.0)(18.02 g) (1)(1) = Step 1 – Read the question and determine what information it provides you with (starting point & final destination) Step 2 – Write down your starting point and your final destination 18.02 g = 1 mole H 2 O Step 3 – Determine how you will get from your starting point to your final destination (list any “connections” or conversion factors) Step 4 – Create a fraction by placing your starting point over one Step 5 – Multiply between fractions Step 6 – Write in the bottom unit of the new fraction (this is the same as the top unit of your previous fraction) Step 7 – Write the appropriate conversion factor into the fraction. Your bottom unit will guide you. Step 8 – Determine if this top unit is the desired unit (your final destination). In this case the answer is YES, so we move on to step 9 Step 9 – Cancel all diagonal units. Once this is done, your final destination should be the only unit left – in this case centimeters Step 10 – Multiply the top of the fractions; multiply the bottom of the fractions; divide the product of the top by the product of the bottom Starting Point Final Destination

5. If you put 2.78 grams of salt on your chicken, how many moles is that? 2.78 grams of salt  moles NaCl (2.78 grams) 1 ( ) mole grams 0.04757 moles of NaCl 1 58.44 = (2.78 moles) (58.44) = Step 1 – Read the question and determine what information it provides you with (starting point & final destination) Step 2 – Write down your starting point and your final destination 58.44 g = 1 mole NaCl Step 3 – Determine how you will get from your starting point to your final destination (list any “connections” or conversion factors) Step 4 – Create a fraction by placing your starting point over one Step 5 – Multiply between fractions Step 6 – Write in the bottom unit of the new fraction (this is the same as the top unit of your previous fraction) Step 7 – Write the appropriate conversion factor into the fraction. Your bottom unit will guide you. Step 8 – Determine if this top unit is the desired unit (your final destination). In this case the answer is YES, so we move on to step 9 Step 9 – Cancel all diagonal units. Once this is done, your final destination should be the only unit left – in this case seconds Step 10 – Multiply the top of the fractions; multiply the bottom of the fractions; divide the product of the top by the product of the bottom Starting Point Final Destination

6. The average American consumes 80.9 moles of sugar a year. Assuming it is all sucrose (C 12 H 22 O 11 ), how many grams is that? 80.9 moles  grams C 12 H 22 O 11 (80.9 moles) 1 ( ) grams mole 27,695.306 grams of sucrose 342.34 1 = ( 27,695.306 g) (1 x 1) = Step 1 – Read the question and determine what information it provides you with (starting point & final destination) Step 2 – Write down your starting point and your final destination 1 mole = 342.34 grams C 12 H 22 O 11 Step 3 – Determine how you will get from your starting point to your final destination (list any “connections” or conversion factors) Step 4 – Create a fraction by placing your starting point over one Step 5 – Multiply between fractions Step 6 – Write in the bottom unit of the new fraction (this is the same as the top unit of your previous fraction) Step 7 – Write the appropriate conversion factor into the fraction. Your bottom unit will guide you. Step 8 – Determine if this top unit is the desired unit (your final destination). In this case the answer is YES, so we move on to step 9 Step 9 – Cancel all diagonal units. Once this is done, your final destination should be the only unit left – in this case seconds Step 10 – Multiply the top of the fractions; multiply the bottom of the fractions; divide the product of the top by the product of the bottom Starting Point Final Destination

7. If Mr. Pruett’s Chia Tea Latte has 120.0 mg of caffeine (C 8 H 10 N 4 O 2 ), how many moles has she consumed? 120.0 mg  moles (120.0mg) 1 ( ) gram mg 0.000617856 moles of caffeine 1 1,000 = 120.0 x 1 x 1 (1 x 1,000 x 194.22 = Step 1 – Read the question and determine what information it provides you with (starting point & final destination) Step 2 – Write down your starting point and your final destination 1,000 mg = 1 gram 194.22 grams = 1 mole C 8 H 10 N 4 O 2 Step 3 – Determine how you will get from your starting point to your final destination (calculate the molar mass in this step) Step 4 – Create a fraction by placing your starting point over one Step 5 – Multiply between fractions Step 6 – Write in the bottom unit of the new fraction (this is the same as the top unit of your previous fraction) Step 7 – Write the appropriate conversion factor into the fraction. Your bottom unit will guide you. Step 8 – Determine if this top unit is the desired unit (your final destination). In this case the answer is NO, so we move back to step 5 Step 9 – Cancel all diagonal units. Once this is done, your final destination should be the only unit left – in this case minutes Step 10 – Multiply the top of the fractions; multiply the bottom of the fractions; divide the product of the top by the product of the bottom Starting Point Final Destination ( ) mole grams 1 194.22 Step 5 – Multiply between fractions Step 6 – Write in the bottom unit of the new fraction (this is the same as the top unit of your previous fraction) Step 7 – Write the appropriate conversion factor into the fraction. Your bottom unit will guide you. Step 8 – Determine if this top unit is the desired unit (your final destination). In this case the answer is YES, so we move on to step 9

8. Online Tutorials http://www2.wwnorton.com/college/chemistry/gilber t/tutorials/ch1.htmhttp://www2.wwnorton.com/college/chemistry/gilber t/tutorials/ch1.htm (click on “view tutorial” for dimensional analysis) http://www.wfu.edu/~ylwong/chem/dimensionanalysis /practice/index.htmlhttp://www.wfu.edu/~ylwong/chem/dimensionanalysis /practice/index.html (click on examples under dimensional analysis on the left side of the page) http://chemistry.alanearhart.org/Tutorials/DimAnal/ Interactive Quiz http://chem.lapeer.org/Exams/DimAnalQuiz.html