Consider the equations below. (1) Fe2O3(s) - 2Fe(s) + CO2(g) 2 ) (2) Fe2O3(s) + 3CO(g) - 2Fe(s)+3CO2(g) Which equation must be added to equation (1) to produce equation (2)? CO(g) + O2(g) = C020) 3CO2(g) → 300[g)+302(0) g (+ 3CO( 300(g)+202/9) >3002(0) 3 of 8 w A RL

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water

8. how much enthalpy/heat is transferred when 0.5113gof ammonia (nh3) reacts with excess oxygen according| to the following equation: 4nh3 +502 - 4n0+ 6h20ah = -905.4j