I give brainiest if u help
Need help with 1 and 2a

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

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?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: