An office building with constant-volume system has a filter located
before the outdoor air intake vent with efficiency of 75% for
environmental tobacco smoke (ets). there are 10 occupants, 2 of
whom are smokers. data indicates that smoking one cigarette per
hour produces between 5 and 10 µg/s of particulate matter pm10.
taking the average, a production rate of particulate matter pm10
at 2×7.5 = 15 µg/s can be assumed. the outdoor airflow rate is 20
cfm per person, the supply airflow rate 50 cfm per person, and the
return airflow rate 40 cfm per person. the ventilation
effectiveness is 0.9. assume that there is no ets outdoors.
evaluate the iaq based on air quality standards set by u. s. epa?

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.

If a solution had a ph of 7 what is the solution