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- 1. Balance the following equations:a) ____ Na2SO4(aq) + ____ Pb(C2H3O2)2(aq) → ____ NaC2H3O2(aq) + ____ PbSO4(s) i. How many moles of Pb(C2H3O2)2 are required to react with 1.67 moles Na2SO4? Use dimensional analysis.8. The data in the table below was obtained for the reaction: A + B → P7. Given that the kf of water in a car radiator filled with liquid in the ratio of 62 g of ethylene glycol (HOCH₂ CH₂OH) in 500 g of water is.... (A) -0.93 °C (B) -1.86 C (C) -3.73 C (D) -7.64 °C (E) -5.58 C
- 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.If the empirical formula of a compound is found to be CH2, which of the following value is a plausible molecular mass for the compound? The answer is 70.15. How did you get that?A sample of an industrial waste water is analyzed and found to contain 16.5ppb Fe2+. How many grams of iron could be recovered from 1.81×103 kg of this waste water? Answer:_______ grams Fe
- Farmers use ammonium sulfate as a fertilizer. In the soil, ni-trifying bacteria oxidize NH4+to NO3-, a groundwater contam-inant that causes methemoglobinemia (“blue baby” syndrome).The World Health Organization standard for maximum [NO3-]in groundwater is 45 mg/L. A farmer adds 210. kg of (NH4)2SO4 to a field and 37% is oxidized to NO3-. What is the groundwa-ter [NO3-] (in mg/L) if 1000. m3of the water is contaminated?Aqueous solutions of ammonia (NH3) and bleach (activeingredient NaOCl) are sold as cleaning fluids, but bottlesof both of them warn: “Never mix ammonia and bleach, astoxic gases may be produced.” One of the toxic gases thatcan be produced is chloroamine, NH2Cl. (a) What is theoxidation number of chlorine in bleach? (b) What is theoxidation number of chlorine in chloramine? (c) Is Cl oxidized,reduced, or neither, upon the conversion of bleachto chloramine? (d) Another toxic gas that can be producedis nitrogen trichloride, NCl3. What is the oxidation numberof N in nitrogen trichloride? (e) Is N oxidized, reduced, or neither, upon the conversion of ammonia to nitrogentrichloride?what is the coefficient in front of the O2 when the equation is balanced (using only whole numbers abs the lowest whole number ratio) C2H6O(g)+O2(g)>CO2(g)+H2O(g)
- For the following reaction: 5Ca + V2O5 --> 5CaO + 2V In one process 5 moñ of V2O5 react with 3 mol of acá. Calculate the theoretical yield of V in the unit of mol.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.For the following table fill in the missing values and calculate the theoretical yield. A + 2B à C moles 0.00242 0.00242 ?_________ MW ?_________ 98.06 164.16 g ?_________ ?__0.00002467_______ ?_________ mL 0.20 d(g/mL) 0.80