Review for Final and Second Quarter Benchmark
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1 Review for Final and Second Quarter Benchmark Balance the following Reactions 1. 4Al + 3O 2 2Al 2 O Ca + N 2 Ca 3 N 2 3. Mg + 2AgNO 3 2Ag + Mg(NO 3 ) Al + 3CuCl 2 2AlCl 3 + 3Cu 5. What is the coefficient in front of C when this equation is balanced correctly? 12 C 12 H 22 O 11(s) 12C (s) + 11H 2 O (l) 6. What is the coefficient in front of NaCl when this equation is balanced correctly? 1 AgNO 3(aq) + NaCl (aq) NaNO 3(aq) + AgCl (s) 7. What is the coefficient in front of O 2 when this equation is balanced correctly? 13 2C 4 H O 2(g) 8CO H 2 O (l) 8. What is the coefficient in front of H 2 when this equation is balanced correctly? 3 N 2(g) + 3H 2(g) 2NH 3(g) 9. What is the coefficient in front of H 2 O when this equation is balanced correctly? 3 2Fe (s) + 3H 2 O (g) Fe 2 O 3 + 3H What is the coefficient in front of Ga 2 O 3 when this equation is balanced correctly? 1 Ga 2 O 3 + 3H 2 O 2Ga(OH) What is the coefficient in front of Ca(OH) 2 when this equation is balanced correctly? 3 2H 3 PO 4 + 3Ca(OH) 2 Ca 3 (PO 4 ) 2 + 6H 2 O Moles 12. What element is the mass system based on? Carbon What is the mass of one of Carbon-14? 14 grams 14. How many atoms are in 1 of Carbon-12? 15. How many cules are in 1 of Oxygen (O 2 )? 16. What is a? The number of atoms, or cules in 12 grams of Carbon A is a measurement of what? The number of particles 18. One of Nitrogen-14 has how many atoms? 19. One of Nitrogen-14 has how many grams? 14 grams 20. What do you call 6.02 x of anything? A 21. One of Nitrogen, Oxygen and Chlorine all have the same number of what? Atoms
2 Moles to Particles 22. If you have 3.00 s of NaCl how many cules are there? 3.00 s x cules = 1.806x10 24 cules 23. How many cules are in 6.00 s of H 2 O? 6.00s x cules = 3.612x10 24 cules 24. How many atoms are 4.00 s of Fluorine? 4.00s x atoms = 2.408x10 24 atoms 25. How many cules are in 7.00 s of AlCl 3? 7.00s x cules = 4.214x10 24 cules 26. How many atoms are in 7.00 s of P 4? ( 1 of P 4 has four atoms) 7.00s x 4 s of atoms x atoms = x10 25 atoms 1 Particles to s 27. How many s are in x10 24 particles of Cl? 1.806x10 24 x 1 = 3 s 28. How many s are in 3.01 x10 23 cules of H 2 O? 3.01x10 23 x 1 = 0.5 s 29. How many s are in x10 23 cules of NH 3? 1.505x10 23 x 1 = 0.25 s 30. How many s are in x10 24 cules of FeBr 2? 2.408x10 24 x 1 = 4 s 31. How many s are in x10 24 atoms of P 4? ( 1 cule of P 4 has four atoms this problem has 2 steps) 4.816x10 24 atoms x 1 x 1 cule = 2 s atoms 4 atoms Moles to Grams 32. How many grams are 6.50 s of CaCl 2? 650 s x g = g 1 CaCl How many grams are 20.0 s of C 6 H 14? 20.0 s x 86g = 1720 g 1 C 6 H How many grams are 0.05 s of LiF? 0.05 s x g = g 1 LiF 35. How many grams are 2.50 s of H 3 BO 3? 0.05 s x 61.81g = g 1s H 3 BO 3 Grams to Moles 36. How many s are 32 grams of O 2? 32g x 1 = 1 32g 37. How many s are 48 grams of CH 4? 48g x 1 = 3 s 16g
3 38. How many s are grams of H 2 SO 4? 490.5g x 1 = 5 s How many s are 8.8 grams of CO 2? 8.8g x 1 = 0.2 s 44.0g Moles to Liters 40. How many liters are 7.5 s of SO 3 at STP? 7.5 x = 168 L 41. How many liters are 1.25 s of NiCl 3 at STP? 1.25 x = 28 L 42. How many liters are 3.00 s of KIO 3 at STP? 3.00 x = 67.2 L 43. How many liters are s of Br 2 at STP? x = 2.8 L Liters to Moles 44. How many s are 44.8 Liters of CO 2 at STP? 44.8 L x 1 = 2.0 s 45. How many s are 11.2 Liters of He at STP? 11.2 L x 1 = 0.5 s 46. How many s are 112 Liters of I 2 at STP? 112 L x 1 = 5 s 47. How many s are Liters of MgO at STP? L x 1 = 7 s Multi step calculations 48. How many cules are 55.8 grams of MgO? (2 steps question) 55.8 L x 1 MgO = 1.38 s g 1.38 s x = 8.33 x cules 49. How many cules are 64 grams of O 2? 64 x 1 = 2 s 32 g 2 s x = x cules 50. What is the mass in grams of 3.01 x atoms of Ag? 3.01x10 24 x 1 = 5 s 6.02 x g 5 s x 107.9g = g
4 51. What is the mass in grams of x atoms of Au? 7.224x10 24 x 1 Au = 12 s 6.02 x g 12 s x 197.g = 2364 g 1 Au 52. What is the mass in grams of 44.8 L of H 2 O at STP? 44.8L x 1 = 2 s 22.4L 2 s x 18 g = 36 g H 2 O 53. What is the mass in grams of L of NiF 3 at STP? 7.466L x 1 = s 22.4L s x g = 38.52g NiF 3 Stoichiometry 54. You have 48 grams of O 2 how many s of CO 2 can you produce? (2 steps) 2 C 2 H O 2 4 CO H 2 O 48g x 1 O 2 = 1.5 s O 2 32g 1.5 x 4CO 2 = 1.2 CO 2 CO 2 5 s O You have 23 grams of Na how many grams of H 2 can you produce? (3 steps) 2 Na + 2 H 2 O 2 NaOH + H 2 23 g x Na = 1 Na 23 g 1 Na x 1 H 2 = 0.5 Na 2 Na 0.5 Na x 2.00 g = 1.00 g H 2 1 H You have 54 grams of H 2 O how many grams of H 2 will you need? 2 Na + 2 H 2 O 2 NaOH + H 2 54 g x O 2 = 3 s 18 g
5 3 s x 1 H 2 = 1.5 H 2 2 H 2 O 1.5 H 2 x 2.00 g = 3.00 g 1 H Determine the mass of carbon dioxide produced when g of C 4 H 10 reacts with oxygen according to the following equation: 2C 4 H O 2 8CO H g x = 0.62 s C 4 H g 0.62 s x 8 CO 2 = 2.48 CO 2 2 C 4 H x 44 g = g 1 CO Determine the mass of H 2 0 produced when g of O 2 reacts according to the following equation: 2C 4 H O 2 8CO H g x O 2 = 2.00 s 32 g 2.00 s x 10 H 2 O = O H 2 x 18 g = g 1 H 2 O 59. Determine the mass of Ca(OH) 2 produced when g CaC 2 reacts with of water according to the following equation: CaC 2 + 2H 2 O Ca(OH) 2 + C 2 H g x O 2 = s g s x 1 Ca(OH) 2 = H 2 1 CaC Ca(OH) 2 x g = g 1 Ca(OH) 2
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