If 6.89 g of calcium phosphide are produced from 12.45 g of calcium cyanide, what is the percent yield in the following unbalanced reaction?   (molar masses:  Ca(CN)2 = 92.12 g/mol,  Co3P2 = 238.73 g/mol,  Co(CN)2 = 110.97 g/mol,  Ca3P2 = 182.18 g/mol)                      Ca(CN)2   +   Co3P2   -->   Co(CN)2  +   Ca3P2

When 24.5 g of NH3 reacts, the actual yield of H20 is 26.5g. What is the percent yield? 4NH3(g) + 6NO (g) -> 5N2(g) + 6H20(l)

The useful metal manganese can be extracted from the mineral rhodochrosite by a two-step process. In the first step, manganese(II) carbonate and oxygen react to form manganese(IV) oxide and carbon dioxide: 2MnCO,(G) + 0,(g) 2M1O,(G) + 2C0, (g) In the second step, manganese(IV) oxide and aluminum react to form manganese and aluminum oxidide: 3 MnO, (s) + 4Al(s) 3 Mn(s) + 2 Al,O3 (s) Suppose the yield of the first step is 95.% and the yield of the second step is 84.%. Calculate the mass of manganese(II) carbonate required to make 10.0 kg of manganese. Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits. olo

Combustion of methane is an important fuel source. The combustion produces CO2 and H2O. What is the percent atom economy for the production of H2O in the reaction below?CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)

DEET, C12H17NO, is the active ingredient in many insect repellents. If you want to produce 25.0 mg of DEET from the reaction of C8H7OCl and C4H11N, what is the minimum amount of C4H11N that is needed? C8H7OCl (l) + C4H11N (l)  ->  C12H17NO (l) + HCl (g) MULTIPLE CHOICE: A) 2.50 x 101 g B) 9.56 x 100 g C) 9.56 x 10-3 g D) 3.50 x 102 g E) 4.04 x 10-2 g

What is the mass of silver chloride produced if 18.75 g of aluminum chloride react in the following unbalanced reaction?  (molar masses:  AgNO3 = 169.87 g/mol;  AlCl3 = 133.33 g/mol;  AgCl = 143.32 g/mol;  Al(NO3)3 = 213.00 g/mol)      AgNO3   +  AlCl3   -->   AgCl   +   Al(NO3)3

Dichlorine monoxide, Cl,0, is sometimes used as a powerful chlorinating agent in research. It can be produced by passing chlorine gas over heated mercury(I) oxide according to this equation: HgO+Cl2 → HgCl, + Cl20 What is the percent yield, if the quantity of reactants is sufficient to produce 8.90 g of Cl,0 but only 2.10 g is obtained? Answer in standard notation to the nearest tenth of a percent

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[Rele If baking soda (sodium hydrogen carbonate) is heated strongly, the following reaction occurs: 2NAHCO, (s)Naz CO3 (s) + H20(9) + CO2 (g) Calculate the mass of sodium carbonate that will remain if a 1.08 g sample of sodium hydrogen carbonate is heated. g Naz CO3

Aspirin (C,Hs04) may be synthesized by mixing salicylic acid (C,H,O;) with excess acetic anhydride (C4H6O3). When 2.0 g of salicylic acid is mixed with excess acetic anhydride, 1.7 g of aspirin is collected. What is the percent yield of this reaction? 42. The balanced equation is C;H,O3 + C,H,O3 → C,HgO4+ CH,O2 А. 98% В. 85% С. 77% D. 65 % Е. 55 % 110//1