AP CHEM Final EXAM ANSWERS 100% Correct!

Which hydrocarbon is 84.1% carbon by mass? (A) CH4 (B) C2H6 (C) C4H10 (D) C8H18 - ANSWER(D) C8H18 Lithium hydrogen carbonate, LiHCO3, decomposes when heated to form Li2O, CO2, and H2O. How many moles of H2O are formed when 0.50 mol LiHCO3 decomposes? (A) 0.25 mol (B) 0.50 mol (C) 0.75 mol (D) 1.0 mol - ANSWER(A) 0.25 mol A vessel contains 66 g CO2 and 16 g O2 at a pressure of 10.0 atm. What is the partial pressure of CO2? (A) 5.0 atm (B) 6.0 atm (C) 7.5 atm (D) 8.0 atm - ANSWER First-generation automobile airbags were inflated by the decomposition of sodium azide (M = 65.02): - ANSWER - ANSWER - ANSWER - ANSWER - ANSWER - ANSWER - ANSWER - ANSWER - ANSWER - ANSWER 2 NaN3(s) → 2 Na(s) + 3 N2(g) - ANSWER What mass of sodium azide would be required to inflate a - ANSWER 16.0 L airbag to a pressure of 1.20 atm at 17 ºC? - ANSWER (A) 34.9 g (B) 52.4 g (C) 78.6 g (D) 157 g - ANSWER 5. Wh