PLEASE HELP Aluminum carbonate decomposes to produce aluminum oxide and carbon dioxide.
Al2(CO3)3 ---> Al2O3 + 3CO2
How many grams of aluminum carbonate is needed to give 4.5 g of carbon dioxide by this reaction?

Iknow #2 is d. i just need to know why

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?

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these