1. Your site is contaminated with 158 kg gasoline (C7H16, MW = 100 g/mol) Calculate the...

1. Your site is contaminated with 158 kg gasoline (C₇H₁₆, MW = 100 g/mol) Calculate the amount of O₂, N, and P needed.

Expert Solution

Amanda K answered 2 years ago

A 0.7257 g mixture of KCN (MW = 65.116 g/mol) and NaCN (MW = 49.005 g/mol)...

A 0.7257 g mixture of KCN (MW = 65.116 g/mol) and NaCN (MW = 49.005 g/mol) was dissolved in water. AgNO3 was added to the solution, precipitating all the CN– in solution as AgCN (MW = 133.886 g/mol). The dried precipitate weighed 1.650 g. Calculate the weight percent of KCN and NaCN in the original sample.

MW (g/mol) / MP ( oC) / Solubility in cold H2O (g / 100 mL) /...

MW (g/mol) / MP ( oC) / Solubility in cold H2O (g / 100 mL) / Solubility in boiling H2O (g / 100 mL) Acetanilide 135.2 / 114 / 0.54 / 5.0 Phenacetin 179.2 / 135 / 0.076 / 1.22 Using solubility data in the table of reagents, calculate the minimum amount water needed to recrystallize: i. 1.5 g of phenacetin. ii. 1.5 g of acetanilide. b. If the minimum amount of water needed is used, how many grams of...

Calculate the solidification point of a 30% solution of CH3OH (MW = 32 G / MOL)...

Calculate the solidification point of a 30% solution of CH3OH (MW = 32 G / MOL) in water (MW = 18 G / MOL) KC of water = 1.86 ºC / m

Determine the mass of chloride (MW = 35.45 g/mol ) in grams present in 100 mL...

Determine the mass of chloride (MW = 35.45 g/mol ) in grams present in 100 mL of a 0.187 M solution of aqueous FeCl3 (iron(III) chloride).

Calculate the freezing point of a solution of 40.0 g methyl salicylate, (MW: 152.15 g/mol), dissolved...

Calculate the freezing point of a solution of 40.0 g methyl salicylate, (MW: 152.15 g/mol), dissolved in 800. g of benzene, C6H6. Kf of benzene is 5.10 C/m and the freezing point is 5.50°C for benzene.

Calculate the vapor pressure of a 20 % by mass sucrose (MW= 342.30 g/mol) solution. The...

Calculate the vapor pressure of a 20 % by mass sucrose (MW= 342.30 g/mol) solution. The vapor pressure of pure water is 23.8 torr. A) 23.50 torr B) 1.40 torr C) 23.8 torr D) 0.987 torr E) 4.44 torr

3. Calculate the pH of a buffer solution made by adding 25.5 g of NaCH3CO2 (MW:82.034g/mol),...

3. Calculate the pH of a buffer solution made by adding 25.5 g of NaCH3CO2 (MW:82.034g/mol), and 0.550M HCH3CO2 (Ka=1.8x10-5) to make 500 mL of the buffer. a. Identify the acid and the base (write the formula and the ID next to it) b. Will Na+ affect the pH of the solution? Why? c. What is your prediction for the calculated pH compared to the pKa of the sample? Why? d. What is the pH of the solution? Was your...

A sample containing a mixture of SrCl2·6H2O (MW = 266.62 g/mol) and CsCl (MW = 168.36...

A sample containing a mixture of SrCl2·6H2O (MW = 266.62 g/mol) and CsCl (MW = 168.36 g/mol) originally weighs 1.7215 g. Upon heating the sample to 320 °C, the waters of hydration are driven off SrCl2·6H2O, leaving the anhydrous SrCl2. After cooling the sample in a desiccator, it has a mass of 1.2521 g. Calculate the weight percent of Sr, Cs, and Cl in the original sample.

If you are given the following solids: Na3PO4 MW = 163.94 g/mol K3PO4 MW = 212.26

If you are given the following solids: Na3PO4 MW = 163.94 g/mol K3PO4 MW = 212.26 g/mol NaH2PO4 MW = 119.98 g/mol K2HPO4 MW = 174.17 g/mol Na2HPO4 MW = 141.96 g/mol KH2PO4 MW = 136.08 g/mol Which compounds would you use to prepare your stock solutions? Why? I picked KH2PO4 and K2HPO4 because potassium salts dissolve more readily in H2O which would make the lab go more smoothly. I would like to know if I'm missing any...

Calculate the freezing point of a solution containing 1.25 g of benzene (78 g/mol) in 100...

Calculate the freezing point of a solution containing 1.25 g of benzene (78 g/mol) in 100 g of chloroform. ∆T = Km Kfp chloroform = 4.68 oC/m Freezing point chloroform = -63.5 oC

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