Molecular weight/Freezing point

When 1.00 g of urea (CO(NH2)2) is dissolved in 200g of solvent A, the freezing point is lowered by 0.250C. When 1.50 g of the nonelectrolyte Y is dissolved in 125 g of the same solvent A, the freezing point is lowered by 0.200C.(a) Find the molecular weight of Y. (b) The freezing point of A is 12C and its molecular weight is 200 g/mol. Find ΔHmfus of A

What presumptions can be made about the following : The third generally accepted standard of audit fieldwork requires that auditors obtain sufficient, competent audit evidence to afford a reasonable basis for an opinion regarding the financial statements under examination. |

Find probability for fewer the claims have been padded : Your office has just received 140 insurance claims to be processed in the next few days. Find the following probabilities. |

Groups-third sylow theorem : If you know the order of the normalizer N of can you find the generators for N? Give a solid math argument why this is correct and please keep the answer as simple as possible at the same time. |

What is "structural mobility" : What is "structural mobility" and how does this concept describe the decline of manufacturing jobs in the United States since the early 1970s? (Ch.7) |

Define the freezing point is lowered : When 1.00 g of urea (CO(NH2)2) is dissolved in 200g of solvent A, the freezing point is lowered by 0.250C. When 1.50 g of the nonelectrolyte Y is dissolved in 125 g of the same solvent |

Estimating groups and subgroups : Let G sub1 and G sub 2 be groups, with subgroups H sub 1 and H sub 2, respectivetly. Show that {(x sub 1, x sub 2) | H sub 1 is an element of H sub 1, x sub 2 is an element of H sub 2} is a subgroup |

Estimate the parameters in the model : Obtain standard errors of your estimates in part (a) using the Wild bootstrap with and using the bootstrap (with B = 9; 999) test H0 : 2 = 0 vs. H0 : 2 = 0 at the 5% level. |

Compute brad ending basis in his partnership interest : Brad has a basis of $15,000 in the partnership interest, including his shaer of partnership liabilities. The partnership expects to report substantial income in future years. Illustrate what rules are used to compute Brad's ending basis in his pa.. |

Probabillity that-sample undergraduate major in accounting : What is the probabillity that in a random sample of 1,200 undergraduate business students, 336 or more will major in accounting? |

## What weight of sulfuric acid will be neededWhat weight of sulfuric acid will be needed to react completely 35.5g of ammonia in the production of ammonium sulfate. |

## Calculate the diameter of an oil moleculeA drop of oil volume 0.05 cm3 is released from a medicine dropper on to a calm surface of a pond where it spreads out to cover an area of 40 cm2. Calculate the diameter of an oil molecule. |

## To what pressure should you fill the acetylene tankImagine that you have a 5.00L gas tank and a 4.50L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. |

## How much will the ph changeA beaker with 185 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.70 mL of a 0.440 M HCl solution to the beaker. |

## Calculate the amount of coal burned in a yearOne metric ton (1000 kg) of coal is required to produce 7.3 MW-hr of electrical energy. In 1993, the Thomas Hill power plant (a small, coal-fired plant supplying rural electric cooperatives) produced 7100000.0 MW-hr. |

## How many moles of carbon, c , were in the original sampleAn unknown compound contains only carbon, hydrogen, and oxygen (C_xH_yO_z). Combustion of 5.50 of this compound produced 8.07 of carbon dioxide and 3.30 of water. |

## Explain waste management plan for protecting environmentYou are the chief environmental officer of an industrial operation of your choosing. Describe your operation, its different components or stages, the materials used and the type of wastes generated. |

## How much of sunstance is in a sample requires to vaporizeA certain substance has a molar heat of vaporization of 31.6 kj/mol. How much of the sunstance is in a sample that requires 57 kj to vaporize. |

## How many moles of bismuth formBismuth oxide reacts with carbon to form bismuth metal: Bi2O3(s) + 3C(s) --> 2Bi(s) + 3CO(g) |

## What is the initial concentration of the chlorineFind what is the initial concentration of the chlorine before dilution - unknown concentrated chlorine |

## What is the molar mass of the compoundA 1.6 g sample of a molecular compound is dissolved in 104 g of tetrachloromethane (carbon tetrachloride). The normal boiling point of the solution is 61.51degreesC, the normal boiling point of CCl4 is 61.2degreesC. The boiling point constant for .. |

## What is the pressure of dry hydrogen gasHydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C. The barometric pressure at the time was 742.5 mm Hg. |

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