Auseful application of oxalic acid is the removal of rust (fe2o3) from, say, bathtub rings according to the reaction below. fe2o3(s) + 6 h2c2o4(aq) 2 fe(c2o4)33−(aq) + 3 h2o + 6 h+(aq) calculate the number of grams of rust that can be removed by 8.00 ✕ 102 ml of a 0.800 m solution of oxalic acid.

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

Draw the lewis dot structure for each of the following polyatomic ions

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.