4ESO Stoichiometry as a whole

1. When 200 g of NaHCO3 95% react with HCl 0.5M they produce Sodium chloride, water and a gas which provoques global warming  is released. a) Write the chemical equation  (balance it). b)Determine the volume of HCL 0.5M you need c)Determine the volume of gas measured at 20°C and 0.9 atm.
2. In a blast furnace, Iron is reduced from Fe2O3 to Fe (steel in fact) with graphite (C), which turns into CO2. Write the chemical equation. Determine the mass of graphite they need to get a kg of steel, and the volume of CO2 measured at 500°C and 2.5 atm.

Data: Pm Cl:35.5; Na 23; C 12; O 16; H 1 g/mol R=0.082 atm•l/Kmol