### Evaluate the molar mass of the unknown compound

Assignment Help Chemistry
##### Reference no: EM13544929

When a 41.7g sample of an unknown compound is dissolved in 500g of benzene, the freezing point of the resulting solution is 3.77oC. The freezing point of pure benzene is 5.48oC, and Kf for benzene is 5.12oC/m. Calculate the molar mass of the unknown compound.

#### Questions Cloud

 What is the maximum external price : What is the maximum external price, what will be total net income and what is the contribution margin ratio - how many units must be sold to earn net income of \$300,000? Find the direction of the photon : An electron going east with speed ve = 0.4c collides with a proton going north with speed vp = 0.3c. Find the direction of the photon Find what is his speed at the bottom of the swing : Tarzan swings on a 31.0 m long vine initially inclined at an angle of 34.0° with the vertical. What is his speed at the bottom of the swing Compute the wavelength of the incident photon : In a Compton scattering experiment, an x-ray photon scatters through an angle of 17.4° from a free electron that is initially at rest. Calculate the wavelength of the incident photon Evaluate the molar mass of the unknown compound : When a 41.7g sample of an unknown compound is dissolved in 500g of benzene, the freezing point of the resulting solution is 3.77oC. The freezing point of pure benzene is 5.48oC, and Kf for benzene is 5.12oC/m. Calculate the molar mass of the unkno.. Obtain the final equilibrium temperature of lead and water : A 234.0 g piece of lead is heated to 86.0oC and then dropped into a calorimeter containing 611.0 g of water that initally is at 24.0oC. find the final equilibrium temperature (in oC) of the lead and water Define how many moles of urea must be dissolved : How many moles of urea (60g/mol) must be dissolved in 71.6g of water to give a 2.4m solution Compute what is the force on each hinge : A 10 kg door that is 1.0m wide and 2.5m tall is supported by two hinges,each of which is 10 cm from the top(or bottom)of the door. what is the force on each hinge Find how high must the person climb : A 73.6 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 514 (food) Calories. How high must the person climb

### Write a Review

#### State oxide decomposes on heating to elemental mercury

In 1774, Joseph Priestley discovered that mercury(II) oxide decomposes on heating to elemental mercury and a gas, later called oxygen. If 56.0 g of mercury(II) oxide is heated and 26.0 % of it decomposes,

#### What is the molarity of the hno3 solution

A 35.00 mL sample of HNO3 solution is neutralized by exactly 42.63 mL of 0.4153 M KOH. What is the molarity of the HNO3 solution?

#### What is the equivalent weight of this metal

A .117 gram sample of a metal reacts with hydrpchloric acid to produce 36.3mL od dry hydrogen gas. what is the equivalent weight of this metal.

#### Explain the seeded dilution water

A mixture consisting of 30ml of waste and 270ml of seeded dilution water has an initial DO of 8.55mg/l; after 5 day, it has a final DO of 2.40 mg/l. Another bottle containing just the seeded dilution water has an initial DO of 8.75 mg/l

#### Explain at what temperature does gas have a volume

A gas has a volume of 2.84 L at 1.00 atm and 0oC. At what temperature does it have a volume of 7.50 L at 520 mmHg

#### How many moles of naoh would be required

How many moles of NaOH would be required to completely neutralize 37.22 mL of 0.25M HCl?

#### Explain the formal charge for the central atom nitrogen

Lewis Structure for a Nitrate Ion (NO3-1). Assign the formal charge for the central atom, Nitrogen. What is that formal charge

#### Find [h+], [oh-], and ph

A solution is .855% HNO3 by mass. Density of the solution is 1.01 g/mL. Find [H+], [OH-], and pH.

#### How to evaluate the ph of the resulting solution

Calculate the pH of the resulting solution if 22.0 mL of 0.220 M HCl(aq) is added to (a) 32.0 mL of 0.220 M NaOH(aq). (b) 12.0 mL of 0.320 M NaOH(aq).

#### If a raindrop weighs 60 mg on average and 51 105 raindrops

if a raindrop weighs 60. mg on average and 5.1 105 raindrops fall on a lawn every minute what mass in kg of rain falls

#### Commercial vinegar was tritrated with naoh solution to

commercial vinegar was tritrated with naoh solution to determine the content of acetic acid hc2h3o2. for 20.0

#### How much heat energy in calories is needed

how much heat energy in calories is needed to raise the temperture 10.0g of water 6.0C