Evaluate the molecular weight of the white solid

Assignment Help Chemistry

Reference no: EM13550652

While browsing around the lab one day, you find a white solid in a dusty bottle with a faded label. Upon closer inspection, you find that the label says "CxHyOz", from which you gather that the chemical contains carbon, hydrogen, and oxygen. The fragrant odor of the compound piques your curiosity, and you decide to figure out its chemical formula. You make the following observations (use 9.807 m s-2for the acceleration due to gravity):Dissolving 0.100 g of the solid into 200 mL of ethanol at 25.0 °C yields a solution with a density of 0.844 g· cm-3. On the osmotic pressure setup shown on p.362 of Atkins / Jones (refer to Toolbox 9.2), this same solution has a height, h, of 90.08 cm. Upon ideal combustion, 200 g of the white compound forms 471 g of CO2 and 128 g of H2O according to the unbalanced reaction:

CxHyOz+ O2(g) → CO2(g) + H2O(g)(3)

a) Calculate the molecular weight of the white solid.

b) Balance equation (3) for the general case of CxHyOz

c) Determine the chemical formula of this compound.

Reference no: EM13550652

Questions Cloud

Explain what is the maximum number of tablets : What is the maximum number of tablets you can take safely. Each of your generic tablets is 800 mg and contains 95% CaCO3 by mass. The 940 mL volume of your stomach is completely full of acid and water. You are too weak to split tablets so report yo..

Find the magnitude of the velocity of the alpha particle : Collisions between atomic and subatomic particles are usually perfectly elastic. Find the magnitude of the velocity of the alpha particle after the collision

Plane of the loop is parallel to a constant magnetic field : A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.23 m. The normal to the plane of the loop is parallel to a constant magnetic field ( = 0°) of magnitude 0.73 T.

Estimate its speed when it strikes the earth : An object is dropped from rest from a height of 3.74E+6 m above the surface of the earth. If there is no air resistance, what is its speed when it strikes the earth

Evaluate the molecular weight of the white solid : Calculate the molecular weight of the white solid. Balance equation (3) for the general case of CxHyOz

Find the separation between the lenses : A coin is located 22.0 cm to the left of a converging lens (f = 16.0 cm). A second, identical lens is placed to the right of the first lens, such that the image formed by the combination has the same size and orientation as the original coin. Find th..

Explain how many grams of water were there in the sample : A 45-g piece of ice at 0 degree C is added to a sample of water at 8 degrees C. All of the ice melts and the temperature of the water decreases to 0 degree C. How many grams of water were there in the sample

Calculate how fast was car going just before the collision : Two cars collide at an intersection. Car , with a mass of 2000 , is going from west to east, while car , of mass 1300 , is going from north to south at 12.0. How fast was car going just before the collision

What is the magnitude of the induced electric field : An infinitely long solenoid has n turns per length, a radius R, and carries a current I = Io( e^-?t )cos?t where ?, Io, and ? are constants. a. What is the magnitude of the induced electric field (as a function of t) at a distance R/2 from the cen..

User Account

All Pages