C5 Ha+80, > 5 CO2 +6 Ha0 Calcelate the #of moles of He0 produced if 3.0 moles A CSHI2 reacts? Cs Hiz+80z ->5 COz +6 HzO hmes → 山 3.0 3.0 24 15 18
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- When the reactionP4O10 + KOH → K3PO4 + H2Ois balanced, how much KOH is required toreact with 3 moles of P4O10?1252. WG compound weighing 1980 h pressure, yielding An unknown organi d 360 mg of water- 12 my s fully combusted at hig ‘9’30 g of carbon dioxide an hat is its empirical formula? A) CHO, B) CHO, ©) CHO, D) CH,0,Write the empirical formula for the hydrated KAl(SO4)2, based on moles of anhydrous KSI(SO4)2= 0.046 mol molar mass of H2O= 18g/ mol moles of H2O= 0.0444mol ratio pf moles H20 to moles of anhydrous KAI(SO4)2= 9.65/1 . Show all work including units. Hint: if the ratio of moles of H2O to moles of anhydrous KAl(SO4)2 was 4, then the empirical formula would be: KAl(SO4)2•4H2O.
- A well is punched into a slab of gelatin and a solution ofequimolar amounts of NaCl and KCl is placed in it. After anhour the concentration of Na+ and K+ present in the well ismeasured. Which ion, Na+ or K+, would be present ingreater abundance in the well? Explain your answer.Sample: Saline 0.900% (m/v), in sodium chloride (NaCl). Data: M.A. (g/mol): Na = 22.9898; K = 39.0983; Cr=51.9961; Ag = 107.8682; Cl = 35.453; N=14.0067; O = 15.9994. Material available in the laboratory's warehouse: Reagents: distilled water; standardized solution of silver nitrate (AgNO₃), at a concentration of 0.09980 mols/L; Potassium chromate solution (K₂CrO₄) 1%; ammoniacal ferric alum solution [Fe(NH₄)(SO₄)₂] and; nitrobenzene (or cooking oil, alternatively); 0.1000 mols/L potassium thiocyanate (KSCN) standard solution. Glassware: beakers of all sizes available on the market; 50, 100, 150, 200 and 250 ml Erlenmeyers; 10.00 and 25.00 mL volumetric pipettes; 15.00 mL burette; 30.00, 50.00 and 100.00 mL volumetric flasks Calculate the molarity of saline, in terms of the NaCl concentration (concentration in mols/L). (a) 0.900 mols/L (b) 5.84 mols/L (c) 0.154 mols/L (d) 0.0154 mols/LMass of Na2CO3.H2O (g) = 2.12g (g) Mass of the CaCl2.2H2O (g) = 1.98g Mass of the top funnel + filter paper (g) = 15.85g Mass of top funnel + filter paper + CaCO3 collected (g) = 17.81g CaCl2 + Na2CO3 ==== CaCo3 + 2NaCl Theoretical yield in moles and grams? Moles of reagent in excess left unreacted? Mass of precipitate? Experimental yield? Percent yield?
- For the reaction C2H4 + 3O2 ---> 2CO2 + 2H2O, does this mean that ten (10) grams of CO2 produced reuired 0.345 mol O2?In the common process for the manufacture of nitric acid, sodium nitrate is treated with aq. sulphuric acid containing 95% H2SO4. In order that the resulting "niter cake" may be fluid; it is desirable to use sufficient acid so that there will be 34% H2SO4 by wt in the final cake. This excess H2SO4 will actually be in combination with the Na2SO4 in the cake, forming NaHSO4, although for purposes of computation it may be assumed to be free acid. The cake will contain 1.5% water and the reaction will go to completion, but 2% of the HNO3 formed will remain in the cake. Assume that the NaNO3 used is dry and pure. Calculate per 100 kg of NaNO3 charged: (a) wt and % composition of the niter cake (b) wt of aqueous acid to be used (c) wt of water vapor and nitric acid distilled from the niter cake.Assume that 1.00 mL (1.02 g) of crude product mixture is obtained from the reactionbefore the washing steps, and the distribution constant of the product mixture in brine isK = (Cmixture/Cbrine) = 50.0. Assuming that after mixing the product mixture volume isstill 1.00 mL (i.e., the volume lost is small), and the volume of the first brine wash layeris 2.00 mL. What mass (grams) of product mixture is lost (dissolves) in the first brinewash? (See Technique 13.2, p 53.) Show work.
- 43. In the preparation of Rochelle salt (MW = 282.83 g/mol), 7.2 grams of monohydrated Sodium carbonate (MW = 124.01 g/mol) dissolved in 80 mL water was made to react with 20g of Potassium bitartrate (MW = 188.10 g/mol). What is the amount of Rochelle salt obtained from Monohydrated Sodium carbonate? Rochelle's Salt:2 KHC4H4O6 + Na2CO3.H2O + 6 H2O -> 2 KNaC4H4O6.4H2O + CO2 ↑ a 38.77 g b 28.74 g c 36.48 g d 32.84 gWhen Na3PO4 and Ca(NO3)2 are combined , the following reactions occurs:2PO4 3- (aq) + 3 Ca2+ (aq) ------ Ca3PO4)2How many grams of Ca3(PO4)2 (MM = 310.18 g/mol) are obtained from 15.00 ml of 0.1386 M Na3PO4 are mixed with 20.00 ml of 0.2118 M Ca(NO3)2 ?Is it conceivable to have both a limiting and an excess reactant in the presence of a perfect one to one ratio?