Calculate the mass of oxygen required to react with iron to produce 240 g of iron (III) oxide. 4Fe + 3O2 —--> 2Fe2O3

Perform the following mathematical operations and report the answer to the appropriate number of significant figures 5.87998 + 3.100

What provides structure to the human body?

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?