Question

Chlorine gas reacts with phosphorus to produce phosphorus pentachloride as shown in the chemical equation below. What is the maximum number of grams of PCls are produced from 3.5 g of Cl2 and excess P? 5C12(g) + 2P(s) → 2PC13(s) 2) What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr2O3 with 8.00 g of aluminum according to the unbalanced chemical equation below? Al(s) + Cr2O3(s) → Al2O3(s) + Cr(s) Ammonia reacts with oxygen to form nitric oxide and water vapor: 4NH3 + 502 → 4NO + 6H2O When 20.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent (reactant)? How many grams of excess reactant are left over after the reaction is completed? 4) Consider unbalanced chemical equation: Mg2Sis) + H2O + Mg(OH)2(aq) + SiH4(g) How many moles of excess reactant are left over if we start with 39.1 g of each reactant? 5) 75.5 g of solid CaO is reacted with 50.0 g of C according to the unbalanced equation below. Determine the mass of the excess reactant is left over after the reaction is completed. CaO(s) +Cs) + CaC2(s) + CO2(g) Ferrocene, Fe(CH3)2(s), can be prepared by reacting 3.0 g of FeCl (s) with an equal mass of cyclopentadiene, C3H6(1), and an excess of KOH, as shown in the following reaction FeCl2 + 2C5H6 + 2KOH → Fe(CsH3)2 + 2H20 + 2KCI a) What is the limiting reagent? b) What mass of Fe(CsH3)2 could theoretically be formed? c) A student who carried out this reaction obtained 2.7 g of ferrocene. What was the percent yield for this reaction? 7) The first step in the Ostwald process for producing nitric acid is 4NH3(g) + 502(g) → 4NO(g) + 6H2O(g). If the reaction of 0.15kg of ammonia with 0.15kg of oxygen gas yields 87g of nitric oxide, what is the percent yield of this reaction? The process for the production of aluminum involves the reaction of aluminum oxide with elemental carbon to give aluminum metal and carbon monoxide. If the yield of this reaction is 75%, what mass of aluminum metal is actually produced from the reaction of 1.65 x 10°g of aluminum oxide with 1.50 x 100 g of carbon?

Answer 1

© Given reaction is 50l+ap apcls from the balanced reaction 5 moles cļ produce a moles pils : 1 mole cl, = 70.99/mol, 1 mole Poly = 208.99/mo .; 5(70.99) of clk 2 (208.29) of pok . 354.59 of Cl₂ a 4 16:49 of PC! 3.59 of Ch g of pck. A maximum number of gopic is 416.49 of pals 354 .5g of C X 3.5g of ch. = 4.19 of pels : 4.1g of pals produced.