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English-metric conversions (2 pts each/4 pts total)

English-metric conversions (2 pts each/4 pts total) Relevant Conversion factor : 1 lb =454 g = 0.454 kg =16 oz. Ex. How many oz in 567.5 g ? _______oz in 567.5 g. 20. 2.2. Metric-metric symbols and conversions (16 pts). 10 -12. p. Ex. 200  g = ?? kg . = 200*10 -9. =2*10 -7.

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English-metric conversions (2 pts each/4 pts total)

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  1. English-metric conversions (2 pts each/4 pts total) Relevant Conversion factor : 1 lb =454 g = 0.454 kg =16 oz • Ex.How many oz in 567.5 g ? • _______oz in 567.5 g 20 2.2. Metric-metric symbols and conversions (16 pts) 10-12 p Ex. 200 g = ?? kg =200*10-9 =2*10-7

  2. 2.3. unknown metal density determination (4 pts) See density lab and review metal density determination 2.4 egg arithmetic (2 pt each/8 pts total)) A dozen monstrously large eggs from Aldi’s weighs 2000 g. Assuming 1 dozen =12 count: Ex. • If you have 50,000 grams of eggs, how many eggs do you have ? __________ egg count 300

  3. 2.5. Simple mole-weight-count conversions (3 pts each/18 pts total) SHOW WORK !!! Assuming that a mole count= 6*1023 and the gram atomic masses: C=12 g/mol O=16 g/mol H= 1 g/mol Ex. Glucose has the molecular formula C6H12O6 . What is its’ molecular weight ? ______g/mol 180 How many molecules of glucose are in 9 grams of glucose ? ______ molecules glucose in 9 grams Ex. 3*1022

  4. 2.6. Stoichiometry Problems (`Body Parts’): Show work ! (5 pts each/25 pts total) The molecular mass of dynamite=TNT (C7H5N3O6) is 227 g/mol. Given the atomic masses C=12 g/mol, H = 1 g/mol, N = 14 g/mol O=16 g/mol Ex. • How many grams of N are in a sample of TNT • containing 0.714 mol H ? _______ g N 6

  5. 2.7. % Composition problems and combustion problems ( 3 pts each/9 pts total) Ex. n/nmin n=w/at. wt 5 6 26.667 32 Ex. 0.8333 1 C6H32O1 Empiric formula=: ____________________ Ex. CxHy is burned to form 4.4 g CO2 and 1.8 g H2O. What is the empiric formula of CxHy ?

  6. 2.8 combustion analysis Ex. CxHy is burned to form 4.4 g CO2 and 1.8 g H2O. What is the empiric formula of CxHy ? CH2 2.9 Reaction Balancing (2 pt each/ 6 pts total) Balance these reactions: ___ C2 H6 + ___O2___CO2 + __H2O 6 4 2 5

  7. 2.9 Naming ( 1 pt/name; 4 pts total) Review Stock namingmethod presented in lab Given: carbonate = CO3-2 nitrate = NO3-1 Use the Periodic Table provided to name or determine the formula of the compounds below: CuCO3 name=_______________ Copper (II) carbonate Calcium acetate =_____________ Ca(C2H3O2)2

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