What is the oxidation number of cl in naclo3

Plz me get these answer dubble cheak ur answer plz ppl i need it right

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Will mark as brainliest ! how many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (ii) nitrate solution react with excess aluminum metal? show all work needed to solve this problem!