The production of concrete accounts for about 7% of the global emissions of CO 2, and about half of that total comes from the first step. strongly heating calcium carbonate (limestone) to drive off CO 2 as follows: CaCO3(s) Cao(s) + CO2(g) If a lab trial of the process were started with 24.6 g of calcium carbonate, run at 500C and CO2 was 'captured in a 5.50 L flask at 850 Torr and 55C, what is the efficiency of CO2 capture? (2 marks) O a. 86.5% O b. 82.7% O c. 94.3% O d. 39.4% The Ford Coyote 5.0 L V-8 engine has a bore (diameter) and stroke of 92.2 and 92.7 mm, respectively, and a compression ratio of 12.0. If the mixture of gases (air + octane) in a cylinder (area = nr 2) before compression is at 1.5 atm and 300 K, what would be the pressure (assume ideal gas behaviour) at 400 K after compression (.e.-just before ignition)? (2 marks) O a. 30 atm O b. 18 atm 01. 24 atm 0 d. 28 atm Infra-red radiation is less energetic than visible-blue radiation True O False