A 2,000-foot, one-way, two-lane rectangular tunnel filled with cars is blocked by an accident at the exit. The longitudinal ventilation system involves large exhaust fans drawing ambient air into one end of the tunnel and blowing it out the other end Assume that the tunnel fills with cars, all with engines idling. One car occupies 18 linear feet of space in one lane in the tunnel and emits 2.6 grams of CO per minute with the engine idling. The tunnel is 30 feet wide and 15 feet tall. The fans blow 270,000 ft^3 /min of ambient air into the tunnel entrance. Derive an equation to predict the steady-state concentration of CO as a function of position in the tunnel. The CO concentration at 971 ft away from the entrance is 38mg/m^3. Required:
What is the concentration of CO in ambient air?

the atomic mass is the bottom number on the element.

-steel jelly

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.