What is the pH of this buffer? The Ka of lactic acid, HC3H5O3, is 1.410?4. (a) Suppose buffer #1 is prepared using 40.0 mL 0.1 M HC3H5O3 and 60.0 mL 0.1 M C3H5O3- to give a final volume of 100.0 mL. What is the pH of this buffer? (b) Suppose a buffer #2 is prepared using 60.0 mL 0.1 M HC3H5O3 and 40.0 mL 0.1 M C3H5O3- to give a final volume of 100.0 mL. What is the pH of this buffer? (c) Calculate the pH of each buffer if 0.001 moles of OH- are added to each

Machine that has a single register and six instructions : Machine that has a single register and six instructions |

What is the index of refraction of the unknown liquid : A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. What is the index of refraction of the unknown liquid |

What is the difference between syntax and semantics : Explain the distinction between an ambiguity in a proposed algorithm and an ambiguity in the representation of an algorithm. |

What is the tension in the cables : A 20 Kg loudspeaker is suspended 2.0 m below the ceilling by two cables that are each 30' from vertical . What is the tension in the cables |

Describe the ka of lactic acid hc3h5o3 : The Ka of lactic acid, HC3H5O3, is 1.410?4. (a) Suppose buffer #1 is prepared using 40.0 mL 0.1 M HC3H5O3 and 60.0 mL 0.1 M C3H5O3- to give a final volume of 100.0 mL. What is the pH of this buffer |

Calculate average flow rate and hydraulic gradient : The cylinder has a length of 120 cm and a diameter of 12 cm. The field sample with a porosity of 0.24 is tested under a constant head difference of 160 cm with water at 10 degree Celcius. |

Where do othe researchers drop ff the ewaste : Where do othe researchers drop ff the ewaste and where does it end up? |

Calculate linear momentum of football player : Use the following scenario for questions 8-10. The mass of Football Player A is 117 kg, and his linear velocity is 6.12 m/s. Calculate linear momentum of Football Player A |

Calculate temp increase which would induce max compression : Calculate the temperature increase which would induce maximum compression in the wall of the vessel equal to the maximum tension. young's modulus for steel can be taken as 200Gpa and the coefficient of thermal expansion as 12*10^-6mm(mm Celsius). |

## What is the molarity of the solution formedwhat is the molarity of the solution formed by mixing 0.20 mol of sodium hydroxide with enough water to make 150 ml of solution |

## Compute the heat (in j) transferred to the surroundingsAssuming the mixture has the same specific heat (4.184J/goC) and density (1.00 g/cm3) as water, calculate the heat (in J) transferred to the surroundings, qsurr. |

## Comopute the number of oxygen molecules per liter of airCalculate the number of oxygen molecules per liter of air if the temperature and pressure were 25°C and 1.00 atm, respectively. |

## Describe the large disparity in the numerical results pfExplain the large disparity in the numerical results pf Part (a). Discuss the advantages and disadvantages of the three energy sources. |

## A separation conditions fit for size-exclusion requirementsOn size-exclusion chromatogram you have three peaks (2.9, 3.5, and 4.8 min). Column dead volume is 12 mL, and flow rate 4 ml/min. Are your separation conditions fit for size-exclusion requirements? Explain why. |

## Amount of solid deposited at the bottom of the flaskThe surface area of 100 g of glucose > than that of 1 g. give explanation why the solubility does not increase with the amount of solid deposited at the bottom of the flask? |

## Explain how many grams of h2so4 are requiredIf 20.g of NaCl are used, how many grams of H2SO4 are required for complete reaction? Using the balance equation 2NaCl(s)+ 1H2SO4(aq)= 2HCl(aq)+ 1Na2SO4 |

## State a balance chemical equation for the combustionwrite a balance chemical equation for the combustion of 1 mol glycerin, and calculate delta H for this reaction at 298K if burning 1.24g of glycerin has a delta E of -54.6 kj |

## Explain barium acetate as the titrant is carried outA titration of sulfates in a 5.00 mL sample of drinking water with 10.0 mM (millimolar) of barium acetate as the titrant is carried out. A microflow pump was used instead of a buret |

## Calculate the volume occupied by n2 using the van der waalsCalculate the volume occupied by 1.00 mol N2 using the van der Waals equation in the form of a virial expansion at (a) its critical temperature, (b) its Boyle temperature, and (c) its inversion temperature |

## What is the percent by mass of sodium hydroxideIf a solution is made by adding 83 grams of sodium hyroxide to 750 ml of water what is the percent by mass of sodium hydroxide in this solutions ? |

## Explain the temperature of the calorimeter increasedThe temperature of the calorimeter increased from 25.4 to 40.2 degrees C. The specific heat is 4.184J/gC and the calorimeter constant is 289 J/C. Determine the specific heat of the glass beads. |

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