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

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

The most common form of matter in the universe