A 12.9 g sample of an aqueous solution of perchloric acid contains an unknown amount of the acid. If 10.7 mL of 0.338 M barium hydroxide are required to neutralize the perchloric acid, what is the percent by mass of perchloric acid in the mixture

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced