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- Gravimetric analysis of Fe3O4 (MW = 232 g/mole) may be undertaken with the following reactions: Fe3O4 → Fe2O3 → Fe (OH)3. Weight of sample containing 8.00% Fe3O4 that must be taken to obtain a precipitate of Fe(OH)3 (MW = 107 g/mole) that weighs 150 mg is . a. 0.108 g b. 0.325 g c. 1.355 g d. 4.065 g Amount of Fe2O3 (MW = 160 g/mole) from which 150 mg of Fe(OH)3 (MW = 107 g/mole) may be obtained is . a. 0.112 g b. 0.224 g c. 0.448 g d. none of the other choicesA sample of processed meat scrap weighing 4.000 g is digested with concentrated H.SO. and Hg(catalyst) unti the Npresent has been converted to NHHSO.. This is treated with excess NaOH, and the liberated NHs is caught in a 100-ml of H.SO. ( Iml = 0.01860 g Na:OJ. The excess acid requires 57.60 ml of NaOH ( Iml = 0.12660 g potassium acid phthalate, KHCaH.O.j. Calculate the percentage protein in the meat scrap30jud to 28AM basu mw 5. Sodium carbonate is a reagent that may be used to standardize acids in the same way that you have used KHP in this experiment. In such a standardization it was found that a 0.498-g sample of sodium carbon- ate required 23.5 mL of a sulfuric acid solution to reach the end point for the reaction.
- iew oard F2 History 25 Bookmarks Aktiv Che X O8 https://app.101edu.co # 3 FEB 22 Tools ******* 20 F3 o Mail - Thom P Parchment 4 Window Write the balanced COMPLETE ionic equation for the reaction when AgNO3 and KCI are mixed in aqueous solution. If no reaction occurs, simply write only NR. Be sure to include the proper phases for all species within the reaction. 1 + 04- 2 NO O Reset 999 000 F4 Help 0₂ 000 % 5 TW6D2PHI.pdf Unofficial Transi 3 4 5 F5 Question 9 of 40 03 04 05 N NR ^ 0 6 F6 6 : 6 MacBook Air 0 = (s) 7 06 07 & 7 2+ K UAFS Regist Graduation Appl CIO li i N F7 3+ 8 9 0 08 09 口。 x H₂O (1) (g) (aq) * CO 4+ 8 e FB CI (IC) IC My.UAFS - S Ag Delete tv w Ⓒ ( 9 F9 ☎ с M Inbox (2) - 0 ☆ F10B. DETERMINATION Molarity of nitric acid, M Volume of nitric acid, mL Molarity of sodium hydroxide, M Volume of sodium hydroxide, mL Initial Temperature (°C) Temperature of mixture (°C) 30 10 30 60 90 120 150 180 210 29 28 27 26 25 Time (sec) 1.00 5.00 26.7 Temperature of mixture (°C) vs. Time (sec) 0 29.0 29.0 OF THE ENTHALPY OF REACTION OF NITRIC ACID AND SODIUM HYDROXIDE 1.00 10.00 Temperature of mixture (°C) 26.7 27.8 29.0 29.0 29.0 29.0 50 Final Temperature (°C) AT (°C) AH (J/mol) AH (kJ/mol) 100 Time (sec) 150 200The solubility of KNO; (in gr KNO; per 100 gr water) is 155 gr KNO; at 75 °C and 38 gr KNO3 at 25 °C. What mass of KNO; (in grams) will crystallize out of solution if exactly 100 gr of its saturated solution at 75 °C are cooled to 25 °C? О а. 75.4 gr оь. 45.9 gr 110 gr O d. 30.7 gr
- 3 Bal, (aq)+ 2 Nag POq Caq) 7 BalPO42 + l6 Nal laq • Consider the reaction of 30.0mL of 0.270M Balz with 20.0 mL of 0.3ISM Naz PO4. Lwhat quantity in meles of Balz are preset in the solution? are produced /What quantitg in moles of precipitate E ali Bal were consumed based on the balanced chomical equation? 6) What auantity in males of Na3 Pla aro present in soluction? d) What quantity in moles of precipitate are paduced if all the Naz PO, were cansumed based on the balanced chemi.cal equation? e) which reactant is limisting f What mass (in g) of precipitate is firemed when the limiting reactant is considered?O e) % KBr = % 66.2 , % KCI = % 33.8 %3D The solubility product (Ksp) for 4 points Pb(OH)2 (s) is 2.5 x 10-16. What would be the quantity of solubility by g/L of Pb(OH)2 which has Mwt =241.2 g/mole)? O 9.947 x 10-4 O 5.975 x 10-4 O 7.596 x 10-5 O 9.575 x 10-4 O 9.723 x 10-4 Calculate [H+], PH and POH 4 points100 90 80 NANO 70 60 CaCl 50 Pb(NO)2 40 KCI NaCi 30 20 KCIO 10 Ce,(SO.) 10 20 30 40 50 60 70 80 90 100 Temperature ('C) • If 25 g KNO.is dissolved in 100 g water at 10°C and the solution s cooled to 5°C, how much of the salt crystallizes out of the solution? Solubility (g of salt in 100 g H,O) KNO3 K,Cr,O,
- . In C.AJ = - kt.tln [A.o]. t¹/₂ = 0.693 K In = KE •1• [A]o⋅=⋅· 100 ·/. [A] + = left . CAJO. CAJE In. [100] [s] t =.kt K= 0.693 t¼½₂ CAJO t = |n² Ch t = ln [AG] ·K CAJO K= In [At]. t Formulas Problem: Na-24 has a half life of 15 hours. How much of a 20.09. ·Sample would remain after decaying for 60 hours? Plz explain step by step. using the formulas..3.A core sample is saturated with an oil (po = 35°API), gas and water. The initial weight of the sample is 224.14 g. After the gas is displaced by water (pw = 1 g/cm'), the weight is increased to 225.90 g. The sample is the placed in a Soxhlet distillation apparatus, and 4.4 cm' water is extracted. After drying the core sample, the weight is now 209.75 g. The sample bulk volume, 95 cm3 is measured in a mercury pycnometer. Find the porosity, water saturation, oil saturation, gas saturation and lithology of the core sample.Below you will find five reaction products (labeled product 1, product 2, etc.), but you will only find four reaction schemes. Your job is to match the reaction scheme with the correct product. Simply fill in the blank with the product number (i.e. 1,2,3,4, or 5). Then, state the regio-control that governs the reaction (i.e. Markovnikov or anti-Markovnikov). If the reaction does not have any regio-control then enter none. OH X Product 1 iocontrol: Product 2 1. Hg(OAc)2, H₂O 2. NaBH4 $ -OH do % Product 3 OH to 4- Product 4 OH OH Product 5 700 hp