Oxalic acid can remove rust (fe2o3) caused by bathtub rings according to the reaction fe2o3(s) + 6h2c2o4(aq) → 2fe(c2o4)33−(aq) + 3h2o(l) + 6h+(aq) calculate the number of grams of rust that can be removed by 7.00 × 102 ml of a 0.100 m solution of oxalic acid.

1.87 grams Looking at the balanced equation, it indicates that for every mole of rust as a reactant, you need 6 moles of oxalic acid. So let's see how many moles of oxalic acid we have by multiplying the molarity of the solution by the quantity. 7.00x10^2 ml / 1000 ml/l * 0.100 M = 7.00x10^-2 mol So the number of moles of rules that can be converted is 7.00x10^-2 mol / 6 = 1.17x10^-2 mol Now determine the molar mass of Fe2O3. Atomic weight iron = 55.845 Atomic weight oxygen = 15.999 Molar mass Fe2O3 = 2 * 55.845 + 3 * 15.999 = 159.687 g/mol Mass Fe2O3 = 159.687 g/mol * 1.17x10^-2 mol = 1.87 g So the amount of rust that can be removed is 1.87 grams.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

Perimeter? wheres the answers