When 189.4 g of ethylene (C2H4) burns in excess oxygen to give carbon dioxide and water, how many grams of CO2 are formed

One of the reactions in a blast furnace used to reduce iron is shown above. how many grams of fe2o3 are required to produce 15.5 g of fe if the reaction occurs in the presence of excess co? a.11.1 g b.22.1 g c.30.0 g d.44.2 g

Omg imgonnafailnfiedkla use complete sentences to explain how the mass of hydrogen is conserved during cellular respiration.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )