Reference no: EM13661170

1. A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.35g of the compound in water to form 0.250L solution. The resulting solution has an osmotic pressure of 0.605 atm at 25 degrees C. Assuming that the organic compound is a nonelectrolyte, what is it's molar mass? 2.A "canned heat" product used to warm chafing dishes consists of a homogenous mixture of ethanol (C2H5OH) and paraffin that has an average formula of C24H50. What mass of C2H5OH should be added to 620kg of the paraffin in formulating the mixture if the vapor pressure is of ethanol at 35 degrees C over the mixture is to be 8 torr? The vapor pressure of pure ethanol is 35 degrees C is 100 torr. 3.Silicon has a face-centered cubic crystal structure with unit cell edge length of 5.43 Angstrom and four atoms per unit cell. a) How may silicon atoms are there in 1cm3 of material? b) Suppose you dope that 1-cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required?