The combustion of 4.000g of a compound that contains only C, H, N and Br yields 3.826g of CO2 and 2.087g of H2O. Another sample of the compound with a mass of 3. 111g is found to contain 1.803 grams of Br. What is the empirical formula of the compound?

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

Why are pipes bursting in the in extremely cold weather?

When a septic tank backs up a goes in to clean it out