Question

please answer all pleass

NAME: BIS Test No. Answer following questions clearly with set-ups. You may not be given any credit if the final answer is written without showing any set-up and/or equations. Please print. 1. (28) a. Write the balanced chemical equation of the combustion reaction of liquid pentane (CsHs). b. Write the complete ionic equation equation of the precipitation reaction of aqueous Pb(NOs) and aqueous Na:S? c. Write the net ionic equation of combining aqueous solutions of FeCl:(aq) and KOH(aq) d. Write the molecular equation for the precipitation reaction of aqueous solutions of NaS and ZnCl2. e. Calculate pH of a 0.386 M of HCl solution? fi. Balance the following equation: Al:Os (s) O2 (g) Al (s)+ ii. Which chemical has an oxidation reaction? Explain. g Complete combustion of a 0.30-mol sample of a hydrocarbon, CaH,, gives 1.80 mol of CO2 and 1.20 mol of H2O. What is the molecular formula of the original hydrocarbon?

Answer 1

1)a) 205 Hip 5 coola) + 10 H₂O(g) 9 20g Hio (l) + 10 0₂ (9) 6) pb et aa) +2 Pbat caa) +200 (aa) + 2 Natiaa) atsiaa) > PbS (s) + 2Na+ (aq) + 2NO3 (aq) Fe 2+ (aq) +204- (aq) Fe(OH)2 (5) Nas (aq) + Zucla (aq) + 2 Nald (aa) + ZnS (s) e) Chce] = 0.386 M . [H+] = 0.386M pH = -log[ht] =- log (0.386) = 0.413 5 3 4 Alls) + 30,19) — 2 Al2O3 1. Al is oxidized because it's oxidation state changes from o to the That means it has lost 3 é. 3 Gbg molar ratio of Cx Hy , co, and . H20 18 0. 30: 1.80: 1.20 = 1:6:4 Cetty + no 6CO₂ at 4H₂O x 26 and y28 . Molecular formula C6H8

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