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Honors Chemistry Worksheet 1 Mass-Moles-Particles Molstoiws09. doc Name Date Period Concept Questions 1. One mole is defined as 2. The mole only applies to chemistry in other words you couldn t have a mole of cars or a mole of stars. Circle one True / False 3. The mole is a unit whereas grams is a unit. 4. The coefficients in a balanced chemical equation can be used with which of the following for setting up ratios Circle all that apply Moles Grams Molecules/Atoms 5. To convert from grams to moles of a substance you must 9. The molar mass of a compound is found by 10. The mole has the numerical value of and is known as Problem Solving Perform the following calculations using the example below as a guide Example Problem Convert 20. 0g of HCl to moles of HCl 1molHCl. 55mol HCl Answer 20. 0gHCl 36. 46 g Molar mass of HCl Convert to moles 1. 15. 5g of H2O mol g 2. 125. 0g of H2SO4 3. 16. 10g of lithium nitrate 4. 100. 0g of dinitrogen tetraoxide Convert to grams 1. 0024mol NH3 2. 6. 5x10-4 mol CO 3. 4. 0mol carbon tetrachloride 4. 2. 5mol nitrogen gas Synthesis Questions 1. How many grams of HCl contain the same number of units as there are in 60. 0g of CaCl2 2. How many moles of HCl contain the same number of grams as there are in. 45mol of CaCl2 3. How many times more particles are there in 10. 0g of H2O than in 10. 0g of CO2 4. If you wanted a 2 to 1 ratio of H2O molecules to CO2 molecules and you had 50. 0g of H2O how many grams of CO2 would you need Hint It isn t 25 5. Which element has a molar mass of 126. 9g/mol 6. For which element does 2. 5 moles have a mass of 518g 7. You performed an experiment on a diatomic element and found that. 25g of the substance contained 6. One mole is defined as 2. The mole only applies to chemistry in other words you couldn t have a mole of cars or a mole of stars. Circle one True / False 3. The mole is a unit whereas grams is a unit. 4. The coefficients in a balanced chemical equation can be used with which of the following for setting up ratios Circle all that apply Moles Grams Molecules/Atoms 5. Circle one True / False 3. The mole is a unit whereas grams is a unit. 4. The coefficients in a balanced chemical equation can be used with which of the following for setting up ratios Circle all that apply Moles Grams Molecules/Atoms 5. To convert from grams to moles of a substance you must 9. The molar mass of a compound is found by 10. To convert from grams to moles of a substance you must 9. The molar mass of a compound is found by 10. The mole has the numerical value of and is known as Problem Solving Perform the following calculations using the example below as a guide Example Problem Convert 20. The mole has the numerical value of and is known as Problem Solving Perform the following calculations using the example below as a guide Example Problem Convert 20. 0g of HCl to moles of HCl 1molHCl. 55mol HCl Answer 20. 0gHCl 36. 46 g Molar mass of HCl Convert to moles 1. 0g of HCl to moles of HCl 1molHCl. 55mol HCl Answer 20. 0gHCl 36. 46 g Molar mass of HCl Convert to moles 1. 15. 5g of H2O mol g 2. 125. 0g of H2SO4 3. 16. 10g of lithium nitrate 4. 100. 0g of dinitrogen tetraoxide Convert to grams 1.