Ethanol vapours were allowed to completely fill a Culligan jug with a volume of 18.9L.  The ethanol was burned yielding 9.6mL of LIQUID water in the bottom of the jug.  C2H5OH + 3 O2 --> 2 CO2 + 3 H20 If the room temperature was 23.5 oC and the pressure was 97.5KpA, calculate the percentage yield of the water gathered in the jug. (density of water = 1.00 g/mL) - 24% - 76% - 17% - not enough information

Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, through which oxygen diffuses into their bodies. The tracheae begin at the surface of the insect's body and penetrate into the interior. Suppose that a tracheae is 1.34 mm long with a cross-sectional area of 2.46 x 10-9m2. The concentration of oxygen in the air outside the insect is 0.794 kg/m3, and the diffusion constant is 1.26 x 10-5 m2/s. If the mass per second of oxygen is diffusing through a trachea is 1.66 x 10-12 kg/s, then find the oxygen concentration at the interior end of the tube.

1.If the partial pressure of N2 is 3.10 x 105 Pa and the partial pressure of Ne is 4.75 x 105 Pa in a given mixture, what is the mole fraction of Ne (XNe)?   What type(s) of intermolecular forces must be overcome when liquid dipropyl ether (CH3CH2CH2-O-CH2CH2CH3) vaporizes? (You may select more than one. Incorrect answers will be penalised.)   Question 2 options: a dipole-dipole forces b dispersion forces c hydrogen bonds d covalent bonds

A mixture consiting of 1.000 mol H2O(g) and 1.000 mol CO(g) is placed ina  reaction vessel of volume 10.00 L at 800. K. At equilibrium, 0.665 mol CO2(g) is present as a result of the reaction CO (g) + H2O (g)⇋ CO2(g)+H2(g). What are the value of KC at 800. K?