An open container was monitored and found to have toluene evaporation rate of 0.1 g/min. the ventilation rate is 2.84 m3/min, the temperature is 27 °c, and the pressure is 1 atm. estimate the concentration of toluene vapor in the enclosure and compare it to the tlv of 50 ppm. perform the calculation for a k of 0.1 and 0.5

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

What is a number added in front of a formula in order to balance the equation