How do you define the system so that the energy changes are all transformations internal to an isolated system

In an effort to address concerns about global warming, a power plant in portland,oregon is designed to take all of its exhaust gases from its boilers and recycle the co2 using the solvay process to make sodium hydrogen carbonate. the reaction is shown below. nh3(g) + h2o(l) + co2(g) + nacl(aq) → nahco3(aq) + nh4cl(aq) how many liters each of nh3 and co2 (both at stp) would be consumed to produce 3.00 kg of sodium bicarbonate? the volume of both nh3 and co2 would be

Find the mass in grams of 1.37x1020 particles of h3po4

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?