### Define the freezing point is lowered

Assignment Help Chemistry
##### Reference no: EM13125785

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 &#916;Hmfus of A

### Write a Review

#### What weight of sulfuric acid will be needed

What 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 molecule

A 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 tank

Imagine 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 change

A 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 year

One 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 sample

An 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 environment

You 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 vaporize

A 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 form

Bismuth oxide reacts with carbon to form bismuth metal: Bi2O3(s) + 3C(s) --> 2Bi(s) + 3CO(g)

#### What is the initial concentration of the chlorine

Find what is the initial concentration of the chlorine before dilution - unknown concentrated chlorine

#### What is the molar mass of the compound

A 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 gas

Hydrogen 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.